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exp_FearGen_ForAll.m
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function [p]=exp_FearGen_ForAll(subject,Nseq,phase,csp,PainThreshold)
%[p]=exp_FearGen_ForAll(subject,phase,csp,PainThreshold)
%
%
% This code is based on the exp_FearAmy.m, adapted to run the initial FearGen
% experiment (Onat & Buechel, 2015).
%
% When the experiment starts as experimenter you will have to pass through
% few sanity checks (press (V)alidate to continue). Once these are
% passed, some text will be shown to the participant. You can also pass
% these stages by pressing V (normally the subject has to read them and
% press confirm key). These instructions for participants are shown using
% the ShowInstruction function, where you precise instructions by their
% id number. All instructions are stored in the GetText function by these
% ids. So if you would like to change instructions you will need to
% modify that function.
%
% The experiment starts with PHASE = 1. Here I set the shock intensity
% while the participant is in the scanner. The shock threshold is
% measured outside the scanner. This is here just to validate the shock
% intensity that will be used during the experiment, it is obtained by
% the PAINTHRESHOLD (given as input) times P.OUT.SHOCKFACTOR (defined
% below). PAINTHRESHOLD is only painful half of the time by definition,
% and we would like to give a shock which is more painful but still
% bearable by the participant. That is, I ask the participant to confirm
% the shock is PAINFUL and BEARABLE. If the shock is not bearable the
% program will propose a lower amplitude and the same question will be
% repeated until these two conditions are fulfilled. It is always good to
% stay in oral communication with the participant though. The phase = 1
% continues with a short presentation of faces, where I evaluate whether
% they 1/ follow the fixation cross as instructed and 2/ detect the
% oddball target. If they fail in any of these, phase 1 is repeated. This
% phase also helps people to familiarize with the faces if no other task
% has yet been carried out befo
%
% The phase 2 is baseline. All faces are shown, but non predicts the
% shock. Instead shocks are delivered after a shock symbol. This phase
% ends with ratings.
%
% Phase 3 is conditioning. Only CS+ and CS- are shown and CS+ is shocked
% at about 30% of the cases.
%
% Phase 4 is similar to baseline, all faces are shown, but shock follows
% the CS+ face to avoid extinction. Following this phase, there is the
% detection task.
%
%
% The current experiment can fully work with the Eyelink
% eye-tracker. This is however now disabled. If you intent to record
% eye-movements turn the EyelinkWanted flag to 1.
%
% The parallel communication currently relies on the cogent's OUTP
% function. It is used to deliver shocks and to send event pulses to the
% physio computer. If you intend to use a Windows systems you can install
% cogent and outp function, then you would be able to directly use this
% code. Or take the extra mile and code the outp equivalent in PTB (that
% would be nice).
%
% To do before you start:
% Set the baselocation for the experiment in SetParams around line 420:
% p.path.baselocation variable. this location will be used to save
% the experiment-related data for the current subject.
%
%
% Example usage:
% exp_FearGen_ForAll(12,3,4,1,8.43); runs the Conditioning paradigm (3) for
% participant 12, using the stimulus sequence 4 where the CS+ face is
% face number 1 for a participant who has a shock intensity of 8.43.
%
%
% Selim Onat
debug = 1;%debug mode => 1: transparent window enabling viewing the background.
EyelinkWanted = 0;%is Eyelink wanted?
%replace parallel port function with a dummy function
if ~IsWindows
%OUTP.m is used to communicate with the parallel port, mainly to send
%triggers to the physio-computer or Digitimer device (which is used to give
%shocks). OUTP is a cogent function, so it only works with Windows. In
%Unix the same functionality can also be obtained with PTB, but it is not
%coded in this program yet. So to communicate via the parallel port, there
%are two options: 1/install cogent + outp, or 2/ use equivalent of OUTP
%in PTB. This presentation will now replace the OUTP.m function with
%the following code, which simply does nothing but allows the program
%run.
%% outp = @(x,y) 1;
end
if nargin ~= 5
fprintf('Wrong number of inputs\n');
keyboard;
end
csn = mod( csp + 8/2-1, 8)+1;%obtain CS- from the CS+ faces
commandwindow;%focus on the command window, so that output is not written on the editor
%clear everything
clear mex global functions;%clear all before we start.
if IsWindows%clear cogent if we are in Windows and rely on Cogent for outp.
cgshut;
global cogent;
end
%%%%%%%%%%%load the GETSECS mex files so call them at least once
GetSecs;
WaitSecs(0.001);
%
el = [];%eye-tracker variable
p = [];%parameter structure that contains all info about the experiment.
s = [];
SetParams;%set parameters of the experiment
SetPTB;%set visualization parameters.
%
%init all the variables
t = [];
nTrial = 0;
%%
%Time Storage
TimeEndStim = [];
TimeStartShock = [];
TimeTrackerOff = [];
TimeCrossOn = [];
p.var.event_count = 0;
%%
InitEyeLink;
WaitSecs(2);
KbQueueStop(p.ptb.device);
KbQueueRelease(p.ptb.device);
%save again the parameter file
save(p.path.path_param,'p');
if phase == 1
%
p.mrt.dummy_scan = 0;%for the training we don't want any pulses
p.var.ExpPhase = phase;
%UCS check
ShowInstruction(4,1);
ConfirmIntensity;
%test
ShowInstruction(1,1);
ShowInstruction(2,1);
PresentStimuli;
elseif phase > 1%baseline, conditioning and test phases
%
if EyelinkWanted
CalibrateEL;
ShowInstruction(299,0,5);
end
%% Vormessung
p.var.ExpPhase = phase;%set this after the calibration;
k = 0;
while ~(k == p.keys.el_calib);
pause(0.1);
fprintf('Experimenter!! press V key when the vormessung is finished.\n');
[~, k] = KbStrokeWait(p.ptb.device);
k = find(k);
end
fprintf('Continuing...\n');
%%
for ninst = [3 301:306]
ShowInstruction(ninst,1);
end
PresentStimuli;
WaitSecs(2.5);
AskStimRating;%make sure that scanner doesnt stop prematurely asa the stim offset
if phase == 4
if EyelinkWanted
CalibrateEL;
AskDetection;
end
AskDetectionSelectable;
end
end
%get the eyelink file back to this computer
StopEyelink(p.path.edf);
%trim the log file and save
p.out.log = p.out.log(sum(isnan(p.out.log),2) ~= size(p.out.log,2),:);
%shift the time so that the first timestamp is equal to zero
p.out.log(:,1) = p.out.log(:,1) - p.out.log(1);
p.out.log = p.out.log;%copy it to the output variable.
save(p.path.path_param,'p');
%
%move the file to its final location.
movefile(p.path.subject,p.path.finalsubject);
%close everything down
cleanup;
function AskDetectionSelectable
%asks subjects to select the face that was associated with a shocks
positions = circshift(1:8,[1 Shuffle(1:8,1)]);%position of the marker
p.var.ExpPhase = 4;
ShowInstruction(8,1);
%%
increment([p.keys.increase p.keys.decrease]) = [1 -1];%key to increment mapping
%%
ok = 1;
while ok
DrawCircle;
Screen('FrameOval', p.ptb.w, [1 1 0], p.stim.circle_rect(positions(1),:), 2);%draw the marker circle somewhere random initially.
Screen('Flip',p.ptb.w);
[~, keyCode, ~] = KbStrokeWait(p.ptb.device);%observe key presses
keyCode = find(keyCode);
if length(keyCode) == 1%this loop avoids crashes to accidential presses of meta keys
if (keyCode == p.keys.increase) || (keyCode == p.keys.decrease)
positions = circshift(positions,[0 increment(keyCode)]);
elseif keyCode == p.keys.confirm
WaitSecs(0.1);
ok = 0;
end
end
end
%%
Screen('FillRect', p.ptb.w , p.stim.bg, p.ptb.imrect );
Screen('Flip',p.ptb.w);
ShowInstruction(14,0,10);
p.out.selectedface = p.stim.circle_order(positions(1));
end
function DrawCircle
for npos = 1:p.stim.tFace
Screen('DrawTexture', p.ptb.w, p.ptb.stim_sprites(p.stim.circle_file_id(npos)),[],p.stim.circle_rect(npos,:));
%Screen('DrawText', p.ptb.w, sprintf('%i_%i_%i',p.stim.circle_order(npos),p.stim.circle_file_id(npos),npos),mean(p.stim.circle_rect(npos,[1 3])) ,mean(p.stim.circle_rect(npos,[2 4])));
end
end
function [myrect]=angle2rect(A)
factor = 1.9;%factor resize the images
[x y] = pol2cart(A./180*pi,280);%randomly shift the circle
left = x+p.ptb.midpoint(1)-p.stim.width/2/factor;
top = y+p.ptb.midpoint(2)-p.stim.height/2/factor;
right = left+p.stim.width/factor;
bottom = top+p.stim.height/factor;
myrect = [left top right bottom];
end
function AskDetection
%
p.var.ExpPhase = 3;
ShowInstruction(801,1);
%% show a fixation cross
fix = [p.ptb.CrossPosition_x p.ptb.CrossPosition_y(1)];%show the fixation cross at the lip position to ease the subsequent drift correction.
FixCross = [fix(1)-1,fix(2)-p.ptb.fc_size,fix(1)+1,fix(2)+p.ptb.fc_size;fix(1)-p.ptb.fc_size,fix(2)-1,fix(1)+p.ptb.fc_size,fix(2)+1];
Screen('FillRect', p.ptb.w , p.stim.bg, p.ptb.imrect ); %always create a gray background
Screen('FillRect', p.ptb.w, [255,255,255], FixCross');%draw the prestimus cross atop
Screen('DrawingFinished',p.ptb.w,0);
Screen('Flip',p.ptb.w);
StartEyelinkRecording(1,0,p.var.ExpPhase,0,0,0,fix,0);
WaitSecs(1.5);
%%
DrawCircle;
%Stimulus onset
Screen('Flip',p.ptb.w);
if EyelinkWanted
Eyelink('Message', 'Stim Onset');
Eyelink('Message', 'SYNCTIME');
end
%%
WaitSecs(30);
Screen('Flip',p.ptb.w);
if EyelinkWanted
Eyelink('Message', 'Stim Offset');
Eyelink('Message', 'BLANK_SCREEN');
end
StopEyelinkRecording;
end
function ConfirmIntensity
%Compute the intensity we want to deliver to the subject.
p.var.ShockIntensity = p.out.PainThreshold*p.out.ShockFactor;
%
ShowInstruction(9,1);
%
fprintf([repmat('=',1,50) '\n']);
fprintf('TEST SHOCK:\n');
fprintf('!!! ADJUST THE SHOCK INTENSITY ON THE DIGITIMER !!!\n');
fprintf(' The intensity is now: %g mA\n',p.var.ShockIntensity);
fprintf(' Experimenter: Press any key to deliver a shock.\n');
fprintf([repmat('=',1,50) '\n']);
%
[secs, keyCode, deltaSecs] = KbStrokeWait(p.ptb.device);
ShowInstruction(10,0,1+rand(1));%shock is coming message...
t = GetSecs + p.duration.shock;
while GetSecs < t;
Buzz;
end
%
message = 'Bewege den "Zeiger" mit der rechten und linken Pfeiltaste\n und best�tige deine Einsch�tzung mit der mit der oberen Pfeiltaste.';
rect = [p.ptb.width*0.2 p.ptb.midpoint(2) p.ptb.width*0.6 100];
response = RatingSlider(rect,2,1,p.keys.increase,p.keys.decrease,p.keys.confirm,{ 'nicht\nertr�glich' 'ertr�glich'},message,0);
if response == 2
fprintf('All is fine :)\n');
fprintf('Subject confirmed the shock intensity inside the scanner...\n');
fprintf('INTENSITY TO BE USED FOR THE MAIN EXPERIMENT: %g mA\n',p.var.ShockIntensity);
p.out.ShockIntensity = p.var.ShockIntensity;
return;
elseif response == 1
fprintf('Shit... :(, %g is too much for the subject\n',p.var.ShockIntensity);
fprintf('We will try a little milder intensity.\n');
p.out.ShockFactor = p.out.ShockFactor - 0.05;
ConfirmIntensity;
end
end
function PresentStimuli
%Enter the presentation loop and wait for the first pulse to
%arrive.
%wait for the dummy scans
[secs] = WaitPulse(p.keys.pulse,p.mrt.dummy_scan);%will log it
KbQueueStop(p.ptb.device);
WaitSecs(.05);
KbQueueCreate(p.ptb.device);
KbQueueStart(p.ptb.device);%this means that from now on we are going to log pulses.
%If the scanner by mistake had been started prior to this point
%those pulses would have been not logged.
%log the pulse timings.
mblock_jumps = logical([1 diff(p.presentation.mblock)]);
TimeEndStim = secs(end)- p.ptb.slack;%take the first valid pulse as the end of the last stimulus.
for nTrial = 1:p.presentation.tTrial;
%Get the variables that Trial function needs.
stim_id = p.presentation.stim_id(nTrial);
fix_y = p.presentation.cross_position(nTrial);
ISI = (p.presentation.isi(nTrial)+1)*2;
ucs = p.presentation.ucs(nTrial);
oddball = p.presentation.oddball(nTrial);
prestimdur = p.duration.prestim+rand(1)*.25;
dist = p.presentation.dist(nTrial);
mblock_jump = mblock_jumps(nTrial);
block_id = p.presentation.mblock(nTrial);
%prestimdur = p_presentation_prestim_dur(nTrial);
%
OnsetTime = TimeEndStim + ISI-p.duration.stim - p.ptb.slack;
fprintf('%03d of %03d, S: %d, ISI: %d, UCS: %d, ODD: %d, OnsetTime: %f secs, ',nTrial,p.presentation.tTrial,stim_id,ISI,ucs,oddball, OnsetTime);
%Start with the trial, here is time-wise sensitive must be
%optimal
[TimeEndStim] = Trial(nTrial,OnsetTime, prestimdur, stim_id , ucs , fix_y, oddball,dist,mblock_jump,block_id);
%(nTrial,TimeStimOnset , prestimdur, stim_id , ucs , fix_i, oddball, dist )
fprintf('OffsetTime: %f secs, Difference of %f secs\n',TimeEndStim,TimeEndStim-OnsetTime-p.duration.stim);
%
%dump it
[keycode, secs] = KbQueueDump;%this contains both the pulses and keypresses.
%log everything but "pulse keys" as pulses, not as keypresses.
pulses = (keycode == p.keys.pulse);
if any(~pulses);%log keys presses if only there is one
Log(secs(~pulses),7,keycode(~pulses));
end
if any(pulses);%log pulses if only there is one
Log(secs(pulses),0,keycode(pulses));
end
%now we have to detect if the subject has pressed the CONFIRM
%key while the ODDBALL stimulus was on the screen.
if any((keycode == p.keys.confirm) & (secs > OnsetTime) & (secs <= TimeEndStim))
p.out.response(nTrial) = 1;
fprintf('Subject Pressed the Hit Key!!\n');
end
end
%wait 6 seconds for the BOLD signal to come back to the baseline...
KbQueueStop(p.ptb.device);
KbQueueRelease(p.ptb.device);
if p.var.ExpPhase > 0
WaitPulse(p.keys.pulse,p.mrt.dummy_scan);%
fprintf('OK!! Stop the Scanner\n');
end
%dump the final events
[keycode, secs] = KbQueueDump;%this contains both the pulses and keypresses.
%log everything but "pulse keys" as pulses, not as keypresses.
pulses = (keycode == p.keys.pulse);
if any(~pulses);%log keys presses if only there is one
Log(secs(~pulses),7,keycode(~pulses));
end
if any(pulses);%log pulses if only there is one
Log(secs(pulses),0,keycode(pulses));
end
%stop the queue
KbQueueStop(p.ptb.device);
KbQueueRelease(p.ptb.device);
WaitSecs(10);
end
function [TimeEndStim]=Trial(nTrial,TimeStimOnset , prestimdur, stim_id , ucs , fix_i, oddball, dist,microblock_jump,mblock_id)
%get all the times
TimeCrossOnset = TimeStimOnset - prestimdur;
TimeCrossJump = TimeStimOnset + p.duration.stim/2;
TimeEndStim = TimeStimOnset + p.duration.stim- p.ptb.slack;
TimeStartShock = TimeStimOnset + p.duration.onset2shock;
TimeTrackerOff = TimeStimOnset + p.duration.keep_recording;
%% Fixation Onset
fix = [p.ptb.CrossPosition_x p.ptb.CrossPosition_y(fix_i)];
FixCross = [fix(1)-1,fix(2)-p.ptb.fc_size,fix(1)+1,fix(2)+p.ptb.fc_size;fix(1)-p.ptb.fc_size,fix(2)-1,fix(1)+p.ptb.fc_size,fix(2)+1];
Screen('FillRect', p.ptb.w , p.stim.bg, p.ptb.imrect ); %always create a gray background
Screen('FillRect', p.ptb.w, [255,255,255], FixCross');%draw the prestimus cross atop
Screen('DrawingFinished',p.ptb.w,0);
TimeCrossOn = Screen('Flip',p.ptb.w,TimeCrossOnset,0);
Log(TimeCrossOn,1,fix_i);%cross onset.
%turn the eye tracker on
StartEyelinkRecording(nTrial,stim_id,p.var.ExpPhase,dist,oddball,ucs,fix,mblock_id);%I would be cautious here, the first trial is never recorded in the EDF file, reason yet unknown.
%% Draw the stimulus to the buffer
if ~stim_id==0
Screen('DrawTexture', p.ptb.w, p.ptb.stim_sprites(stim_id));
end
%draw also the fixation cross
Screen('FillRect', p.ptb.w, [255,255,255], FixCross');
%add freckles to the face if oddball
if oddball
x = randn(1,100)*35;
y = randn(1,100)*10;
s = rand(1,100);%[0 1]
Screen('DrawDots',p.ptb.w,[x;y],1+s.*1.5,[180 0 0 160],p.ptb.midpoint,1);
end
Screen('DrawingFinished',p.ptb.w,0);
%% STIMULUS ONSET
TimeStimOnset = Screen('Flip',p.ptb.w,TimeStimOnset,0);%asap and dont clear
%send eyelink and ced a marker asap
if EyelinkWanted
Eyelink('Message', 'Stim Onset');
Eyelink('Message', 'SYNCTIME');
end
MarkCED( p.com.lpt.address, p.com.lpt.StimOnset );%this actually didn't really work nicely.
%the first stim onset pulse is always missing. This could be due to
%the fact that the state of the port was already 1 and thus CED
%didn't realize this command.
if oddball
MarkCED( p.com.lpt.address, p.com.lpt.oddball );
end
if ucs
MarkCED(p.com.lpt.address, p.com.lpt.ucs);
end
if microblock_jump
MarkCED( p.com.lpt.address, p.com.lpt.mBlock );
Log(TimeStimOnset,9,mblock_id)
end
Log(TimeStimOnset,3,dist);%log the stimulus onset
%% CROSS JUMPS (same as before but with a different fix position)
if ~stim_id==0
Screen('DrawTexture', p.ptb.w, p.ptb.stim_sprites(stim_id));
end
if oddball
Screen('DrawDots',p.ptb.w,[x;y],1+s.*1.5,[180 0 0 160],p.ptb.midpoint,1);
end
fix = [p.ptb.CrossPosition_x p.ptb.CrossPosition_y(setdiff(1:2,fix_i))];%take the other position
%draw also the fixation cross
FixCross = [fix(1)-1,fix(2)-p.ptb.fc_size,fix(1)+1,fix(2)+p.ptb.fc_size;fix(1)-p.ptb.fc_size,fix(2)-1,fix(1)+p.ptb.fc_size,fix(2)+1];
Screen('FillRect', p.ptb.w, [255,255,255], FixCross');
Screen('DrawingFinished',p.ptb.w,0);
TimeCrossJump = Screen('Flip',p.ptb.w,TimeCrossJump,0);%asap and dont clear
Log(TimeCrossJump,4,0);%log the stimulus onset
%%
if ucs == 1
%%%%%%%%%%%%%%%%%%%%%%%
%Deliver shock and stim off immediately
TimeStartShock = WaitSecs('UntilTime',TimeStartShock);
if EyelinkWanted
Eyelink('Message', 'UCS Onset');
end
while GetSecs < TimeEndStim;
Buzz;%this is anyway sent to CED.
end
end
%% STIM OFF immediately
TimeEndStim = Screen('Flip',p.ptb.w,TimeEndStim,0);
%send eyelink and ced a marker
Log(TimeEndStim,6,stim_id);%log the stimulus offset
%
%% record some more eye data after stimulus offset.
WaitSecs('UntilTime',TimeTrackerOff);
if EyelinkWanted
Eyelink('Message', 'Stim Offset');
Eyelink('Message', 'BLANK_SCREEN');
end
TimeTrackerOff = StopEyelinkRecording;
if oddball == 1
fprintf('This was an oddball trial!');
end
if ucs == 1
fprintf('This was a UCS trial!');
Log(TimeStartShock,5,NaN);%UCS delivery...This is done here to not waste time there
end
end
function SetParams
%mrt business
p.mrt.dummy_scan = 0;%this will wait until the 6th image is acquired.
p.mrt.LastScans = 0;%number of scans after the offset of the last stimulus
p.mrt.tr = 2;%in seconds.
%will count the number of events to be logged
p.var.event_count = 0;
%%%%%%%%%%%%%%%%%%%%%%%%%%%
%% relative path to stim and experiments
%Path Business.
[~, hostname] = system('hostname');
p.hostname = deblank(hostname);
p.path.baselocation = 'C:\Users\...\Documents\Experiments\FearGen';
%create the base folder if not yet there.
if exist(p.path.baselocation) == 0
mkdir(p.path.baselocation);
end
p.path.experiment = [p.path.baselocation filesep];
p.path.stim = [fileparts(which('exp_FearGen_ForAll.m')) filesep 'bin' filesep 'FearGen_Stimuli' filesep];
p.path.stim24 = [p.path.stim '24bit' filesep];%location of 24bit stimuli, useful only to send it to the eyelink system
p.path.stim_cut = [p.path.stim 'cut' filesep];%stimuli without borders, necessary for the facecircle
%
p.subID = sprintf('s%02d',subject);%subject id
timestamp = datestr(now,30);%the time_stamp of the current experiment.
p.path.subject = [p.path.experiment 'tmp' filesep p.subID '_' timestamp filesep ];%subject folder, first we save it to the temp folder.
p.path.finalsubject = [p.path.experiment p.subID '_' timestamp filesep ];%final location of the subject folder
p.path.path_edf = [p.path.subject 'eye' filesep];%location of the edf file in the eyelink computer
p.path.edf = sprintf([p.subID 'p%02d.edf' ],phase);%EDF file in the stimulus computer
p.path.path_param = [p.path.subject 'stimulation' filesep 'data.mat'];%location of the paradigm file.
%create folder hierarchy for this subject
mkdir(p.path.subject);
mkdir([p.path.subject 'scr']);%location for the SCR data
mkdir([p.path.subject 'eye']);%location for the edf file and eye-movement related data.
mkdir([p.path.subject 'stimulation']);%location of the stimulus presentation paradigm
mkdir([p.path.subject 'midlevel']);%other data.
%% %%%%%%%%%%%%%%%%%%%%%%%%%
%get stim files
[p.stim.files p.stim.label] = FileMatrix([p.path.stim '*.bmp']);%read in the stimlus
p.stim.tFile = size(p.stim.files,1);%number of different files (including the UCS symbol)
p.stim.tFace = 8;%number of faces.
%
display([mat2str(p.stim.tFile) ' found in the destination.']);
%set the background gray according to the background of the stimuli
for i = 1:p.stim.tFace;
im = imread(p.stim.files(i,:));
bg(i) = im(1,1,1);
end
%is all the captured bg values the same?
if sum(diff(bg))==0;
%if so take it as the bg color
p.stim.bg = double([bg(1) bg(1) bg(1)]);
else
fprintf('background luminance was not successfully detected...\n')
keyboard;
end
%bg of the rating screen.
p.stim.bg_rating = p.stim.bg;
p.stim.white = [255 255 255];
%% font size and background gray level
p.text.fontname = 'Times New Roman';
p.text.fontsize = 18;%30;
p.text.fixsize = 60;
%rating business, how many ticks
p.rating.division = 10;%number of divisions for the rating slider
p.rating.repetition = 2;%how many times a given face has to be repeated...
%% get the actual stim size (assumes all the same)
info = imfinfo(p.stim.files(1,:));
p.stim.width = info.Width;
p.stim.height = info.Height;
%% keys to be used during the experiment:
%This part is highly specific for your system and recording setup,
%please enter the correct key identifiers. You can get this information calling the
%KbName function and replacing the code below for the key below.
%1, 6 ==> Right
%2, 7 ==> Left
%3, 8 ==> Down
%4, 9 ==> Up (confirm)
%5 ==> Pulse from the scanner
KbName('UnifyKeyNames');
p.keys.confirm = KbName('4$');%
p.keys.increase = KbName('1!');
p.keys.decrease = KbName('3#');
p.keys.pulse = KbName('5%');
p.keys.el_calib = KbName('v');
p.keys.el_valid = KbName('c');
p.keys.escape = KbName('esc');
p.keys.enter = KbName('return');
%% %%%%%%%%%%%%%%%%%%%%%%%%%
%Communication business
%parallel port
p.com.lpt.address = 888;%parallel port of the computer.
%codes for different events that are sent for logging in the
%physiological computer.
p.com.lpt.digitimer = 12;%8
p.com.lpt.mBlock = 128;
p.com.lpt.StimOnset = 64;
p.com.lpt.oddball = 32;
p.com.lpt.ucs = 16;
%
%% %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%timing business
%these are the intervals of importance
%time2fixationcross->cross2onset->onset2shock->shock2offset
%these (duration.BLA) are average duration values:
p.duration.stim = 1.5;%2;%s
p.duration.shock = 0.1;%s;x
p.duration.shockpulse = 0.005;%ms; duration of each individual pulses
p.duration.intershockpulse = 0.01;%ms; and the time between each pulse
p.duration.onset2shock = p.duration.stim - p.duration.shock;
p.duration.crossmoves = p.duration.stim./2;
p.duration.keep_recording = 0.25;%this is the time we will keep recording (eye data) after stim offset.
p.duration.prestim = .85;
%% %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%stimulus sequence: Explanation of the fields:
s = load([fileparts(which('exp_FearGen_ForAll.m')) filesep 'bin' filesep 'feargen_seq.mat']);
s = s.s;
%Explanation of the fields:
%.cond_id => Condition id, this is the face to be loaded. 1-8: face id, 9 => oddball, 10 => UCS.
%.UCS => 1 if it is UCS trial, otherwise 0
%.oddball => 1 if it is an oddball trial
%.stim_id => same as cond_id, except for UCS stimuli, where the stim_id is the CS+. This is basically the index of the file that is gonna be read.
%.dist => The angular distance to CS+ face, this is the most important field for analysis
%.cross_position => the position of the cross to be shown, could start from mouth and jump to eyes or vice versa. The exact position is computed in SetPTB.
%.mblcok => irrelevant for this experiment.
%this will deal all the presentation sequence related information
p.presentation = s(Nseq,csp).phase(phase).presentation;
p.presentation.tTrial = length(p.presentation.cond_id);%Total Trials
p.presentation.mblock = ones(1,p.presentation.tTrial);%irrelevant for the FearGen experiment but keeping it.
p.presentation.dist = MinimumAngle((p.presentation.stim_id-1)*45,(csp-1)*45);%infer distances to CS+
%distances are only defined for the face conditions, for example
%UCS, oddball and null trials do not have that.
p.presentation.dist(p.presentation.cond_id == 9) = 1001;
p.presentation.dist(p.presentation.cond_id == 10) = 1002;
clear s;
%% create the randomized design
p.stim.cs_plus = csp;%index of cs stimulus, this is the one paired to shock
p.stim.cs_neg = csn;
%Record which Phase are we going to run in this run.
p.stim.phase = phase;
p.out.rating = [];%will contain explicite ratings of UCS likelihood
p.out.log = zeros(1000000,4).*NaN;%Experimental LOG.
p.out.response = zeros(p.presentation.tTrial,1);%
p.out.PainThreshold = PainThreshold;%the pain threshold (i.e. pain intensity where p(painful) = .5 for the subject, it is an input argument, must be computed before the experiment.
p.out.ShockFactor = 2;%factor to multiply the PainThreshold with, will use this factor to propose the experimenter the final shock intensity to be used during the FearGen Experiment.
%%
p.var.current_bg = p.stim.bg;%current background to be used.
%Save the stuff
save(p.path.path_param,'p');
%
function [FM labels] = FileMatrix(path)
%Takes a path with file extension associated to regexp (e.g.
%C:\blabl\bla\*.bmp) returns the file matrix
dummy = dir(path);
FM = [repmat([fileparts(path) filesep],length(dummy),1) vertcat(dummy(:).name)];
labels = {dummy(:).name};
end
end
function AskStimRating
p.var.ExpPhase = 5;
p.var.current_bg = p.stim.bg_rating;
%% create the order of presentation and balance the position of fixation cross
nseq = 0;
rating_seq = [];
pos1_seq = [];
idx = [];
face_order = 1:p.stim.tFace;
while nseq < p.rating.repetition
nseq = nseq + 1;
[dummy idx] = Shuffle( face_order );
rating_seq = [rating_seq dummy];
%this balances both directions
pos1_seq = [pos1_seq ones(1,p.stim.tFace)];%+1 to make [0 1] --> [1 2]
end
rating_seq = rating_seq(:);
pos1_seq = pos1_seq(:);
%%
message = GetText(11);
SliderTextL = GetText(13);
SliderTextR = GetText(12);
% set the background to different color
Screen('FillRect', p.ptb.w , p.var.current_bg );
Screen('Flip',p.ptb.w);
WaitSecs(2);
%
ShowInstruction(7,1);
rect = [p.ptb.width*0.2 p.ptb.midpoint(2) p.ptb.width*0.6 100];%for the rating slider
tRatend = length(rating_seq);
%save the rating sequence just for security
p.out.rating_seq = rating_seq;
p.out.pos1_seq = pos1_seq;
%run over all the pictures to be rated.
for nRatend = 1:tRatend;
%
%the variable that are used by Trial function
stim_id = rating_seq(nRatend);
fix_y = pos1_seq(nRatend);
%
next_stim_id = [];%this is a trick, otherwise a fixation cross appears right before the rating :(
next_pos1 = [];
%
%to send know the distance here, little dummy setup:
dummy = -135:45:180;
dist = dummy(stim_id);
% show the picture
%Trial(nTrial ,TimeStimOnset , prestimdur, stim_id , ucs , fix_i, oddball, dist,microblock_jump,mblock_id)
Trial(1000+nRatend,GetSecs+1,p.duration.prestim,stim_id,0,fix_y,0,dist,0,0);
% show the slider
rate(nRatend,1) = RatingSlider(rect, p.rating.division, Shuffle(1:p.rating.division,1), p.keys.increase, p.keys.decrease, p.keys.confirm, {SliderTextL{1} SliderTextR{1}},message,1);
%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%Verbose the rating of the subject
fprintf('============\nRating Results %d (%d/%d):\n', stim_id, nRatend, tRatend);
dummy = rating_seq(1:nRatend);%trials shown so far
for iii = 1:p.stim.tFace
r = round(mean(rate(dummy == iii)));
if isnan(r)
r = 0;
end
if iii == p.stim.cs_plus
fprintf('Stimulus %02d: * %s \n',iii,repmat('+',1,1+r));
else
fprintf('Stimulus %02d: %s \n',iii,repmat('+',1,1+r));
end
end
end
%sort the stim_ids and then sort the same the rates and make a
%matrix out of that to store
[~, i] = sort(rating_seq);
rate = reshape(rate(i),p.rating.repetition,p.stim.tFace)';
p.out.rating = rate;
save(p.path.path_param,'p');
Screen('FillRect',p.ptb.w,p.var.current_bg);
%
save(p.path.path_param,'p');
end
function [rating] = RatingSlider(rect,tSection,position,up,down,confirm,labels,message,numbersOn)
%
%Detect the bounding boxes of the labels.
for nlab = 1:2
[~ , ~, bb(nlab,:)]=DrawFormattedText(p.ptb.w,labels{nlab}, 'center', 'center', p.stim.white,[],[],[],2);
Screen('FillRect',p.ptb.w,p.var.current_bg);
end
bb = max(bb);
bb_size = bb(3)-bb(1);%vertical size of the bb.
%
DrawSkala;
ok = 1;
while ok == 1
[secs, keyCode, ~] = KbStrokeWait(p.ptb.device);
keyCode = find(keyCode);
Log(secs,7,keyCode);
if length(keyCode) == 1%this loop avoids crashes to accidential presses of meta keys
if (keyCode == up) || (keyCode == down)
next = position + increment(keyCode);
if next < (tSection+1) && next > 0
position = position + increment(keyCode);
end
DrawSkala;
elseif keyCode == confirm
WaitSecs(0.1);
ok = 0;
Screen('FillRect',p.ptb.w,p.var.current_bg);
t=Screen('Flip',p.ptb.w);
end
end
end
function DrawSkala
%rating = tSection - position + 1;
rating = position ;
increment([up down]) = [1 -1];%delta
tick_x = linspace(rect(1),rect(1)+rect(3),tSection+1);%tick positions
tick_size = rect(3)./tSection;
ss = tick_size/5*0.9;%slider size.
%
for tick = 1:length(tick_x)%draw ticks
Screen('DrawLine', p.ptb.w, [255 0 0], tick_x(tick), rect(2), tick_x(tick), rect(2)+rect(4) , 3);
if tick <= tSection && numbersOn
Screen('TextSize', p.ptb.w,p.text.fontsize);
DrawFormattedText(p.ptb.w, mat2str(tick) , tick_x(tick)+ss/2, rect(2)+rect(4), p.stim.white);
Screen('TextSize', p.ptb.w,p.text.fontsize);
end
if tick == 1
DrawFormattedText(p.ptb.w, labels{1},tick_x(tick)-bb_size*1.4,rect(2), p.stim.white);
elseif tick == tSection+1
DrawFormattedText(p.ptb.w, labels{2},tick_x(tick)+bb_size*0.4,rect(2), p.stim.white);
end
end
%slider coordinates
slider = [ tick_x(position)+tick_size*0.1 rect(2) tick_x(position)+tick_size*0.9 rect(2)+rect(4)];
%draw the slider
Screen('FillRect',p.ptb.w, p.stim.white, round(slider));
Screen('TextSize', p.ptb.w,p.text.fontsize);
DrawFormattedText(p.ptb.w,message, 'center', p.ptb.midpoint(2)*0.2, p.stim.white,[],[],[],2);
Screen('TextSize', p.ptb.w,p.text.fontsize);
t = Screen('Flip',p.ptb.w);
Log(t,-2,NaN);
end
end
function ShowInstruction(nInstruct,waitforkeypress,varargin)
%ShowInstruction(nInstruct,waitforkeypress)
%if waitforkeypress is 1, ==> subject presses a button to proceed
%if waitforkeypress is 0, ==> text is shown for VARARGIN seconds.
[text]= GetText(nInstruct);
ShowText(text);
if waitforkeypress %and blank the screen as soon as the key is pressed
KbStrokeWait(p.ptb.device);
else
WaitSecs(varargin{1});
end
Screen('FillRect',p.ptb.w,p.var.current_bg);
t = Screen('Flip',p.ptb.w);
function ShowText(text)
Screen('FillRect',p.ptb.w,p.var.current_bg);
DrawFormattedText(p.ptb.w, text, 'center', 'center',p.stim.white,[],[],[],2,[]);
t=Screen('Flip',p.ptb.w);
Log(t,-1,nInstruct);
%show the messages at the experimenter screen
fprintf('=========================================================\n');
fprintf('Text shown to the subject:\n');
fprintf(text);
fprintf('=========================================================\n');
end
end
function [text]=GetText(nInstruct)
if nInstruct == 0%Eyetracking calibration
text = ['Wir kalibrieren jetzt den Eye-Tracker.\n\n' ...
'Bitte fixieren Sie die nun folgenden wei�en Kreise und \n' ...
'bleiben so lange darauf, wie sie zu sehen sind.\n\n' ...
'Nach der Kalibrierung d�rfen Sie Ihren Kopf nicht mehr bewegen.\n'...
'Sollten Sie Ihre Position noch ver�ndern m�ssen, tun Sie dies jetzt.\n'...
'Die beste Position ist meist die bequemste.\n\n'...
'Bitte dr�cken Sie jetzt den oberen Knopf, \n' ...
'um mit der Kalibrierung weiterzumachen.\n' ...
];
elseif nInstruct == 1%first Instr. of the training phase.
text = ['Wir werden nun als erstes einen �bungsdurchgang machen,\n' ...
'damit Sie sich an Ihre Aufgabe gew�hnen k�nnen.\n' ...
'In diesem Durchgang k�nnen Sie sich vollkommen sicher f�hlen,\n' ...
'es werden keine elektrischen Reize verabreicht.\n' ...
'Eine wichtige grunds�tzliche Regel ist, dass Sie das Fixationskreuz (das +)\n' ...
'wenn es zu sehen ist, mit Ihren Augen fixieren. \n' ...
'\n'...
'Dr�cken Sie die obere Taste um fortzufahren.\n' ...
];
elseif nInstruct == 2%second Instr. of the training phase.
text = ['Ein paar Bemerkungen zu den Zielreizen: \n' ...
'Zur Erinnerung: Zielreize sind die verschwommenen Gesichter.\n' ...
'Sobald ein solcher Zielreiz erscheint, \n' ...
'sollen Sie schnellstm�glich die obere Taste dr�cken, \n' ...
'und zwar bevor der Zielreiz wieder verschwunden ist \n' ...
'(Sie m�ssen also sehr schnell und aufmerksam sein).\n\n' ...
'Dr�cken Sie die obere Taste um fortzufahren.\n' ...
];
elseif nInstruct == 299%short instruction before localizer
text = ['Die Kalibrierung war erfolgreich.\n'...
'Es startet nun eine kurze Vormessung (~2 min), w�hrend der Sie nichts tun m�ssen.\n\n'...
];
elseif nInstruct == 3%third Instr. of the training phase.
text = ['Wir sind jetzt kurz vor Beginn des Experiments.\n'...
'Wir m�chten Sie nun noch einmal an die wichtigsten Punkte erinnern.\n\n'...
'Dr�cken Sie jeweils die obere Taste um fortzufahren.\n' ...
];
elseif nInstruct == 301%third Instr. of the training phase.
text = ['1/ Folgen Sie immer streng den Fixationskreuzen.\n'...
];
elseif nInstruct == 302%third Instr. of the training phase.
text = ['2/ Dr�cken Sie die Taste, sobald Sie den Zielreiz entdecken.\n'...
];
elseif nInstruct == 303%third Instr. of the training phase.
text = ['3/ Bewegen Sie sich nicht.\n'...
];
elseif nInstruct == 304%third Instr. of the training phase.
text = ['4/ Lassen Sie sich vom Scannergeschehen nicht st�ren.\n'...
];
elseif nInstruct == 305%third Instr. of the training phase.
text = ['5/ Nur eines der Gesichter wird mit elektrischen Reizen gepaart.\n'...
];
elseif nInstruct == 306%third Instr. of the training phase.
text = ['Dr�cken Sie jetzt die obere Taste, das Experiment startet dann in wenigen Sekunden.\n' ...
];
elseif nInstruct == 4%third Instr. of the training phase.
text = ['Vor dem Experiment legen wir nun \n' ...
'die Schockintensit�t f�r den Rest des Experiments fest. \n' ...
'Dr�cken Sie die obere Taste um fortzufahren.\n' ...
];
elseif nInstruct == 7;%rating
text = ['In dieser Phase h�tten wir gerne, dass Sie die Gesichter\n'...
'im Hinblick auf folgende Frage bewerten:\n'...
'"Wie wahrscheinlich ist es, bei dem gerade gesehenen Gesicht \n'...
'einen elektrischen Schock zu erhalten?"\n'...
'Bewegen Sie den Zeiger mit der rechten und linken Taste\n'...
'und best�tigen Sie Ihre Einsch�tzung mit der oberen Taste.\n'...
];
elseif nInstruct == 8;%AskDetectionSelectable
text = ['Sie sehen nun noch einmal eine �bersicht der verschiedenen Gesichter.\n'...
'Bitte geben Sie an, welches der Gesichter Ihrer Meinung nach\n mit dem Schock gepaart wurde.\n\n'...
'Nutzen Sie die linke und rechte Taste, um die Markierung\n zum richtigen Gesicht zu navigieren,\n'...
'und dr�cken Sie die obere Taste zum Best�tigen.\n\n'...
'Bitte zum Starten die obere Taste dr�cken.\n'...
];
elseif nInstruct == 801;%AskDetectionSelectable
text = ['Sie sehen nun eine �bersicht der verschiedenen Gesichter.\n'...
'Bitte schauen Sie sich die Gesichter aufmerksam an.\n'...
'Bitte dr�cken Sie zum Start die obere Taste und\n' ...
'fixieren Sie das anschlie�end erscheinende Fixationskreuz.\n'...
];
elseif nInstruct == 9%
%=================================================================================================================%
text = ['Bitte geben Sie an, ob die Reizst�rke des folgenden Schocks\n f�r Sie ertr�glich ist.\n'...
'\n'...
'Dr�cken Sie bitte die obere Taste um den Reiz zu bekommen.\n'...
];
elseif nInstruct == 10%just before the shock
text = ['Reiz kommt...\n'];
elseif nInstruct == 11%this is the rating question
text = ['Wie wahrscheinlich ist es, bei dem gerade gesehenen Gesicht \n'...
'einen elektrischen Schock zu erhalten?\n' ...
'Bewegen Sie den "Zeiger" mit der rechten und linken Taste\n' ...
'und best�tigen Sie Ihre Einsch�tzung mit der mit der oberen Taste'...
];
elseif nInstruct == 12 %These two below are the possible responses to the question in 11
text = {'Sehr\nwahrscheinlich'};
elseif nInstruct == 13
text = {'�berhaupt\nnicht\nwahrscheinlich'};
elseif nInstruct == 14
text = ['Danke. Den aktiven Teil des Experiment haben Sie nun geschafft.\n'...
'Es folgt nun noch eine strukturelle Messung, die ca. 7 Minuten dauert.\n'...
'Sie k�nnen dabei ruhig die Augen schlie�en und sich entspannen.\n'];
else
text = {''};
end
end
function SetPTB
%Sets the parameters related to the PTB toolbox. Including
%fontsizes, font names.
%Default parameters
Screen('Preference', 'SkipSyncTests', 1);
Screen('Preference', 'DefaultFontSize', p.text.fontsize);
Screen('Preference', 'DefaultFontName', p.text.fontname);
Screen('Preference', 'TextAntiAliasing',2);%enable textantialiasing high quality
Screen('Preference', 'VisualDebuglevel', 0);
Screen('Preference', 'SkipSyncTests', 1);
Screen('Preference', 'SuppressAllWarnings', 1);
%%Find the number of the screen to be opened
screens = Screen('Screens');
p.ptb.screenNumber = max(screens);%the maximum is the second monitor
%Make everything transparent for debugging purposes.
if debug
commandwindow;
PsychDebugWindowConfiguration;
end
%set the resolution correctly
res = Screen('resolution',p.ptb.screenNumber);
HideCursor(p.ptb.screenNumber);%make sure that the mouse is not shown at the participant's monitor
%spit out the resolution,
fprintf('Resolution of the screen is %dx%d...\n',res.width,res.height);
%Open a graphics window using PTB
[p.ptb.w p.ptb.rect] = Screen('OpenWindow', p.ptb.screenNumber, p.var.current_bg);
%Screen('BlendFunction', p.ptb.w, GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
Screen('Flip',p.ptb.w);%make the bg
p.ptb.slack = Screen('GetFlipInterval',p.ptb.w)./2;
[p.ptb.width, p.ptb.height] = Screen('WindowSize', p.ptb.screenNumber);
%find the mid position on the screen.
p.ptb.midpoint = [ p.ptb.width./2 p.ptb.height./2];
%NOTE about RECT:
%RectLeft=1, RectTop=2, RectRight=3, RectBottom=4.
p.ptb.imrect = [ p.ptb.midpoint(1)-p.stim.width/2 p.ptb.midpoint(2)-p.stim.height/2 p.ptb.midpoint(1)-p.stim.width/2+p.stim.width p.ptb.midpoint(2)-p.stim.height/2+p.stim.height];
p.ptb.cross_shift = [180 -120]./2.5;%incremental upper and lower cross positions
p.ptb.CrossPosition_x = p.ptb.midpoint(1);%bb(1);%always the same
p.ptb.CrossPosition_y = p.ptb.midpoint(2)+p.ptb.cross_shift;%bb(1);%always the same
%cross position for the eyetracker screen.
p.ptb.CrossPositionET_x = [p.ptb.midpoint(1) p.ptb.midpoint(1)];
p.ptb.CrossPositionET_y = [p.ptb.midpoint(2)-p.ptb.cross_shift(2) p.ptb.midpoint(2)+p.ptb.cross_shift(2)];
p.ptb.fc_size = 10;
%
%%
%priorityLevel=MaxPriority(['GetSecs'],['KbCheck'],['KbWait'],['GetClicks']);
Priority(MaxPriority(p.ptb.w));
%this is necessary for the Eyelink calibration
%InitializePsychSound(0)
%sound('Open')
% Beeper(1000)
if IsWindows
LoadPsychHID;
end
%%%%%%%%%%%%%%%%%%%%%%%%%%%Prepare the keypress queue listening.
p.ptb.device = [];
%get all the required keys in a vector