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key_prac_scan.m
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key_prac_scan.m
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function [resp_sofar,errors,terminated]=key_prac_scan(project_dir,pathdata,SSID,addtrig,PTBwindow,hand,trial)
%present 1-5 to familiarize the subjects with key
%mapping. Keep presenting until get 45 (a full run) correct in a row, order
%randomly sampled using datasampe(data,n). If participants make a wrong
%response, they will be shown a picture of the correct key for 2
%secondes(may need to adjust codes for screens with different resolutions).
output=cell(500,10);%maximum record 500 trials
output(:,7)={'key_prac'};% fill the "task" column
%create a cell structure for all the options
stim={'1','2','3','4','5'};%,'animate','inanimate'};
KbName('UnifyKeyNames');
endofprac='practice ends';
%setting up control keys
scan_trig=KbName('5%');
ins_done=KbName('2@');
experimenter_pass=KbName('e');
pausekey=KbName('p');
termkey=KbName('t');
%define key list to only accept response keys (in hand struct)
%and pause key in the KbQueue
klist=zeros(1,256);
klist([pausekey, hand.r1, hand.r2, hand.r3, hand.r4, hand.r5])=1;
%load images
img_folder=strcat(project_dir,'/button_box/');
if strcmp(hand.ver,'L5animate')
handv=imread(strcat(img_folder,'left_5.JPG'));
h5=imread(strcat(img_folder,'left_ring.JPG'));
h4=imread(strcat(img_folder,'left_middle.JPG'));
h3=imread(strcat(img_folder,'left_index.JPG'));
h2=imread(strcat(img_folder,'right_index.JPG'));
h1=imread(strcat(img_folder,'right_middle.JPG'));
else
handv=imread(strcat(img_folder,'right_5.JPG'));
h1=imread(strcat(img_folder,'left_middle.JPG'));
h2=imread(strcat(img_folder,'left_index.JPG'));
h3=imread(strcat(img_folder,'right_index.JPG'));
h4=imread(strcat(img_folder,'right_middle.JPG'));
h5=imread(strcat(img_folder,'right_ring.JPG'));
end
%flow control
errors='none';%for debugging, return errors in this function
terminated='none';%for situations where a scanning run has to be terminated and restarted (i.e. change of exp_start and wait for trigger).
%% version 1
try
%% initialize instructions
%make image matrices into OpenGL textures, not drawing them
%yet!
h1_tex = Screen('MakeTexture', PTBwindow, h1);
h2_tex= Screen('MakeTexture', PTBwindow, h2);
h3_tex= Screen('MakeTexture', PTBwindow, h3);
h4_tex= Screen('MakeTexture', PTBwindow, h4);
h5_tex= Screen('MakeTexture', PTBwindow, h5);
vtex=Screen('MakeTexture',PTBwindow,handv);
%load instruction
ins=load_instruction('key_prac',1,hand.ver);
Screen('TextSize',PTBwindow, 60);
%display instruction
[nx, ny, bbox] = DrawFormattedText(PTBwindow, ins{1},'center','center');
Screen('Flip',PTBwindow);
waittrig=1;
while waittrig
[keyIsDown, instime, keyCodes] = KbCheck;
if keyCodes(ins_done)==1
waittrig=0;
end
end
%display hand figure for 5 sec
Screen('DrawTexture', PTBwindow, vtex);
Screen('Flip',PTBwindow);
WaitSecs(5);
info = 'The experiment is going to start in a few seconds';
DrawFormattedText(PTBwindow, info, 'center', 'center');
Screen(PTBwindow, 'Flip');
%wait for dummy scan
dummy_t=cell(addtrig,1);
keyCodes(1:256)=0;
for trig=1:addtrig
waittrig=1;
while waittrig
[keyIsDown, dummy_start, keyCodes] = KbCheck;
if keyCodes(scan_trig)==1
waittrig=0;
end
end
%need to have these two lines to wait for the key release
while KbCheck
end
dummy_t{trig}=dummy_start;%resolution shows in second, but are actually finer (hint:take the difference)
end
%the last dummy trigger received marks the beginning
%of the experiment for the current run
exp_start=dummy_t{end};
Screen('TextSize',PTBwindow,80);%use font size 80 for stimuli
%draw first focuing cross for 3 seconds
DrawFormattedText(PTBwindow, '+', 'center', 'center');
Screen(PTBwindow, 'Flip');
WaitSecs(3);
%% practice procedure loop
%threshold for consecutive correct responses=45
success=0;
%initialize counter for interrupted prac run, if
%it is the first time running this session i
%should be 1
i=trial;
KbQueueCreate([],klist);%use default keyboard and only accept the 5 resp keys and p as input keys in the queue
KbQueueStart;
while success < 45
curWord=datasample(stim,1);%randomly sample from the 7 options
curWord=curWord{1};
DrawFormattedText(PTBwindow,curWord, 'center', 'center' );
onset=Screen('Flip',PTBwindow);
KbQueueFlush;
WaitSecs('UntilTime',onset+1.5);%present the number for 1.5 seconds
jitter=truncexp_jitter_sample(1,4,0.5,1);%randomly sample the truncated exponential distribution for ISI, mean~1.5s
%draw fixation
DrawFormattedText(PTBwindow, '+', 'center', 'center');
Screen('Flip',PTBwindow);
WaitSecs(jitter);
%record resp
output{i,8}=onset;
output{i,2}=i;
output{i,4}=curWord;%record the stimulus
output{i,3}=exp_start;%record ExpStartTime for each trial since we dont know when the run is going to restart
%check response after presentation
[pressed, firstPress]=KbQueueCheck;
%% get response
if pressed%if key was pressed do the following
firstPress(find(firstPress==0))=NaN; %little trick to get rid of 0s
[endtime Index]=sort(firstPress); % sort the RT of the first key-presses and their ID (the index are with respect to the firstPress)
%if the first key press is "animate" or if the first key press is experimenter pause and the second key press is "animate"
if Index(1)==hand.r5
resp='5';
output{i,10}=endtime(1)-onset;%RT
elseif Index(1)==pausekey&&Index(2)==hand.r5
resp='5';
output{i,10}=endtime(2)-onset;%RT
elseif Index(1)==hand.r4
resp='4';
output{i,10}=endtime(1)-onset;%RT
elseif Index(1)==pausekey&&Index(2)==hand.r4
resp='4';
output{i,10}=endtime(2)-onset;%RT
elseif Index(1)==hand.r3
resp='3';
output{i,10}=endtime(1)-onset;%RT
elseif Index(1)==pausekey&&Index(2)==hand.r3
resp='3';
output{i,10}=endtime(2)-onset;%RT
elseif Index(1)==hand.r2
resp='2';
output{i,10}=endtime(1)-onset;%RT
elseif Index(1)==pausekey&&Index(2)==hand.r2
resp='2';
output{i,10}=endtime(2)-onset;%RT
elseif Index(1)==hand.r1
resp='1';
output{i,10}=endtime(1)-onset;%RT
elseif Index(1)==pausekey&&Index(2)==hand.r1
resp='1';
output{i,10}=endtime(2)-onset;%RT
else
resp=[];%pressing any key other than pause key before valid response keys results in noresp
output{i,10}=NaN;%pressing any other key also results in no RT
end
output{i,9}=resp; %record responses before pause
%if the resp match the stimulus,proceed to next trial
%directly
if strcmp(curWord,'1')&&strcmp(resp,'1')
success=success+1;
elseif strcmp(curWord,'2')&&strcmp(resp,'2')
success=success+1;
elseif strcmp(curWord,'3')&&strcmp(resp,'3')
success=success+1;
elseif strcmp(curWord,'4')&&strcmp(resp,'4')
success=success+1;
elseif strcmp(curWord,'5')&&strcmp(resp,'5')
success=success+1;
%if the resp doesn't match the stimulus, display the
%correct key, then proceed to next trial
elseif strcmp(curWord,'1')
Screen('DrawTexture', PTBwindow, h1_tex);
Screen('Flip',PTBwindow);
WaitSecs(2);
success=0;
DrawFormattedText(PTBwindow, '+', 'center', 'center');
Screen('Flip',PTBwindow);
WaitSecs(2);
elseif strcmp(curWord,'2')
Screen('DrawTexture', PTBwindow, h2_tex);
Screen('Flip',PTBwindow);
WaitSecs(2);
success=0;
DrawFormattedText(PTBwindow, '+', 'center', 'center');
Screen('Flip',PTBwindow);
WaitSecs(2);
elseif strcmp(curWord,'3')
Screen('DrawTexture', PTBwindow, h3_tex);
Screen('Flip',PTBwindow);
WaitSecs(2);
success=0;
DrawFormattedText(PTBwindow, '+', 'center', 'center');
Screen('Flip',PTBwindow);
WaitSecs(2);
elseif strcmp(curWord,'4')
Screen('DrawTexture', PTBwindow, h4_tex);
Screen('Flip',PTBwindow);
WaitSecs(2);
success=0;
DrawFormattedText(PTBwindow, '+', 'center', 'center');
Screen('Flip',PTBwindow);
WaitSecs(2);
elseif strcmp(curWord,'5')
Screen('DrawTexture', PTBwindow, h5_tex);
Screen('Flip',PTBwindow);
WaitSecs(2);
success=0;
DrawFormattedText(PTBwindow, '+', 'center', 'center');
Screen('Flip',PTBwindow);
WaitSecs(2);
end
%put the pause and termination check
%after we record the response of the
%current trial
if ~isnan(firstPress(pausekey))
waitcont=1;
DrawFormattedText(PTBwindow,'experiment paused, please wait', 'center', 'center' );
Screen(PTBwindow, 'Flip');
%save partial data
save(strcat(pathdata,'/',SSID,'/',SSID,'_keyPrac_trial-',num2str(i),'_data.mat'),'output');
while waitcont%check if the pause key has been pressed
[~, ~, keyCodes] = KbCheck;
if keyCodes(experimenter_pass)%if continue key has been pressed
waitcont=0;
DrawFormattedText(PTBwindow, '+', 'center', 'center');
Screen('Flip',PTBwindow);
WaitSecs(2);
elseif keyCodes(termkey)
terminated='yes';
resp_sofar=output;
return
end
end
%need to have these two lines to wait for the key release
while KbCheck
end
end
else
resp=[];%not pressing any key results in noresp
output{i,10}=NaN;
output{i,9}=resp; %record responses as empty if no response
if strcmp(curWord,'1')
Screen('DrawTexture', PTBwindow, h1_tex);
Screen('Flip',PTBwindow);
WaitSecs(2);
success=0;
DrawFormattedText(PTBwindow, '+', 'center', 'center');
Screen('Flip',PTBwindow);
WaitSecs(2);
elseif strcmp(curWord,'2')
Screen('DrawTexture', PTBwindow, h2_tex);
Screen('Flip',PTBwindow);
WaitSecs(2);
success=0;
DrawFormattedText(PTBwindow, '+', 'center', 'center');
Screen('Flip',PTBwindow);
WaitSecs(2);
elseif strcmp(curWord,'3')
Screen('DrawTexture', PTBwindow, h3_tex);
Screen('Flip',PTBwindow);
WaitSecs(2);
success=0;
DrawFormattedText(PTBwindow, '+', 'center', 'center');
Screen('Flip',PTBwindow);
WaitSecs(2);
elseif strcmp(curWord,'4')
Screen('DrawTexture', PTBwindow, h4_tex);
Screen('Flip',PTBwindow);
WaitSecs(2);
success=0;
DrawFormattedText(PTBwindow, '+', 'center', 'center');
Screen('Flip',PTBwindow);
WaitSecs(2);
elseif strcmp(curWord,'5')
Screen('DrawTexture', PTBwindow, h5_tex);
Screen('Flip',PTBwindow);
WaitSecs(2);
success=0;
DrawFormattedText(PTBwindow, '+', 'center', 'center');
Screen('Flip',PTBwindow);
WaitSecs(2);
end
end
i=i+1;
end
resp_sofar=output;
DrawFormattedText(PTBwindow,endofprac, 'center', 'center' );
Screen('Flip',PTBwindow);
WaitSecs(3);
catch ME
%need to copy it here as well otherwise if error occurred in loops these variables
%won't get returned
% lastrun=i;
% lasttrial=j;
resp_sofar=output;
Screen('CloseAll');
errors=ME;
terminated='none';
end
end