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ShopTask_Practice.m
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function [trialpicker, manualclose] = ShopTask_Practice(window, c, block, trial, ppnr, mainstart, reminder, condition_SA, fid, SCANNER)
%% Scarcity Project: Shop Task
% Inge Huijsmans
%
% Start writing 2014-10-20
% Last update 2014-10-28
%
% Experiment Design:
% In this Shop task, participants will be able buy two categories of
% products, either hedonic of utalitarian products. They will be offered
% 75% of the retailprice and get to accept of reject the offer.
% At the end of the experiment, one of these trials is selected as bonus
% for the participants (the food + remaining money)
%
% Participants will complete this task in a 2 (condition:
% scarcity/abundance) x 2 (product category: utalitarian/hedonic) within
% subjects design.
%
% Last update: changed bidding task to shoptask
%% Set seed to date+time %%
rng shuffle
% setup bitsi stuff for button responses & HR trigger
setup_bits;
ShopTaskHRlogs;
condition_SA = 1;
%-------------------------------------------------------------------------%
%------------------ Experiment Settings, screen parameters --------------%
%-------------------------------------------------------------------------%
% Get screen number. Default = 0
screens = Screen('Screens');
% Set colors
white = WhiteIndex(screens);
red = [255 0 0];
yellow = [255 255 0];
%Hide cursor
HideCursor;
% Screen size
[screenXpixels, screenYpixels] = Screen('WindowSize', window);
midXpix = screenXpixels/2;
midYpix = screenYpixels/2;
% Textstuff
Screen('TextFont', window, 'Calibri');
Screen('TextSize', window, 42);
Screen('TextStyle', window, 0);
textRect_Y = Screen('TextBounds', window ,' Yes ');
textRect_N = Screen('TextBounds', window ,' No ');
KbName('UnifyKeyNames');
% Parameters for bidding task
discount = 0.5;
image_rect = [0, 0, (screenYpixels*0.4), (screenYpixels*0.4)];
if isunix
textRect_Y(4) = textRect_Y(4) +(textRect_Y(4)/2);
textRect_N(4) = textRect_N(4) +(textRect_N(4)/2);
%textRect(4) = textRect(4)*2;
end
textRect_YES = Screen('TextBounds', window, 'Yes');
textRect_NO = Screen('TextBounds', window, 'No');
image_loc = CenterRectOnPointd(image_rect, midXpix, midYpix-textRect_Y(4));
size_reminder = size(reminder);
xleftbutton = screenXpixels/3;
xrightbutton = (screenXpixels/3)*2;
ybutton = (screenYpixels/5)*4;
price_loc = (screenYpixels/3)*2;
% Presentation times
tooslow = 2;
timeout = 4;
% Parameters different under pc/linux
if ispc
euro = '€';
reminder_loc = [screenXpixels-(((size_reminder(2)/4)*3)+100),100,screenXpixels-100,((size_reminder(1)/4)*3)+100];
else
euro = '€';
reminder_loc = [screenXpixels-round((size_reminder(2)/8)*5),round((size_reminder(1)/8)),screenXpixels-round(size_reminder(2)/8),round((size_reminder(1)/8)*5)];
end
%% Make images textures %%
for image = 1:length(c.trial(:,:,block))
c.trial{1,image,block} = Screen('MakeTexture', window, c.trial{1,image,block});
end
%Reminder
reminder = Screen('MakeTexture', window, reminder);
%% Prepare random trial picker %%
trialpicker = cell(length(c.trial(1,:,1)), 6);
%% Experiment loop %%
%Counters & trackers
quit = 0;
enter = 1;
%Change when closed manually
manualclose = 0;
try
while enter
if quit == 1
break
end
%% Set Trial constants %%
%Start experiment loop for each image
run = 1;
%Start with first screen
screenId = 1;
%yes - no, left - right. yesno(1) = left, yesno(2) = right.
%yesno = c.yesno_LR(:,trial,condition_SA,block);
yesno = c.yesno_LR(:,trial);
%Image texture
image = c.trial{1,trial};
%Image & trial info
%Set price numeric
n_price = str2double(c.trial{2,trial}{5});
discountprice = n_price*discount;
%Condition
condition = char(c.trial{2,trial}{1});
%Saving info
brand = char(c.trial{2,trial}{2});
product = char(c.trial{2,trial}{3});
filename = char(c.trial{2,trial}{6});
%Reset responses for each trial
RT = 0;
gotproduct = 1;
while run
if quit == 1
break
end
%% Flip through Screens %%
switch screenId
case 1
%% Screen 1 %%
% Fixation Cross %
%Fixation Cross
Screen('DrawText', window, '+', screenXpixels/2, screenYpixels/2, white);
%Presentation time
presenttime = rand+1;
%Set HR trigger
HR = c.HR_fixcross{condition_SA};
%Next Screen
screenId = 2;
case 2
%% Screen 2 %%
% Present Product %
%Image
Screen('DrawTexture', window, image, [], image_loc, 0);
%Presentation time
presenttime = rand+3;
%Set HR trigger
HR = c.HR_image{condition_SA};
%Next Screen
screenId = 3;
case 3
%% Screen 3 %%
% Present Product + Price %
%Image
Screen('DrawTexture', window, image, [], image_loc, 0);
% Draw price
DrawFormattedText(window, sprintf('%s%.2f', euro, discountprice), 'center', price_loc, white);
%Next screen
screenId = 4;
%%Set HR trigger
HR = c.HR_price{condition_SA};
%Presentation time
presenttime = rand +3;
case 4
% ------------------- Screen 4 --------------------- %%
% Choice %
%Image
Screen('DrawTexture', window, image, [], image_loc, 0);
% Draw price
DrawFormattedText(window, sprintf('%s%.2f', euro, discountprice), 'center', price_loc, white);
if response
% Nextscreen
screenId = 1;
%Presentation time
presenttime = 4 - RT;
%Go to next trial
trial = trial + 1;
run = 0;
%Color of buttons
switch response
case ButtonA
color = {yellow, white};
if strcmp(c.yesno{yesno(1)}, c.yesno{1})
gotproduct = 2;
end
case ButtonB
color = {white, yellow};
if strcmp(c.yesno{yesno(2)}, c.yesno{1})
gotproduct = 2;
end
end
%Set HR trigger
HR = c.HR_gotnot{condition_SA}(gotproduct);
else
%Color of buttons & presentation time
color = {white, white};
presenttime=0;
%%Set HR trigger
HR = c.HR_yesno{condition_SA};
end
%Layout unix vs pc
if isunix
wierdnomovement = 3;
yplacement = textRect_Y(4)/3;
else
wierdnomovement = 12;
yplacement = textRect_Y(4)/2;
end
%Layout yes vs bi
if yesno(2) == 2
xplacement_LEFT = (textRect_YES(3)/2);
xplacement_RIGHT = (textRect_NO(3)/2)+wierdnomovement;
textRect_L = CenterRectOnPointd(textRect_Y, xleftbutton, ybutton);
textRect_R = CenterRectOnPointd(textRect_N, xrightbutton, ybutton);
else
xplacement_LEFT = (textRect_NO(3)/2)+wierdnomovement;
xplacement_RIGHT = textRect_YES(3)/2;
textRect_L = CenterRectOnPointd(textRect_N, xleftbutton, ybutton);
textRect_R = CenterRectOnPointd(textRect_Y, xrightbutton, ybutton);
end
%Draw Yes-NO
Screen('DrawText', window, sprintf('%s', c.yesno{yesno(1)}), xleftbutton-xplacement_LEFT, ybutton - yplacement, color{1});
Screen('DrawText', window, sprintf('%s', c.yesno{yesno(2)}), xrightbutton-xplacement_RIGHT, ybutton - yplacement, color{2});
%Draw Button rects
Screen('FrameRect', window, white, textRect_L,3);
Screen('FrameRect', window, white, textRect_R,3);
case 5
% ------------------- Screen 5 --------------------- %%
% Too slow %
DrawFormattedText(window, 'Too slow!', 'center', 'center', red);
%Present screen
presenttime=tooslow;
%Set HR trigger
HR = c.HR_wrong{condition_SA};
%Make them redo the trial
screenId = 1;
case 6
% ------------------- Screen 6 --------------------- %%
% Wrong button %
DrawFormattedText(window, 'Wrong button!', 'center', 'center', red);
%Present screen
presenttime=tooslow;
%Set HR trigger
HR = c.HR_slow{condition_SA};
%Make them redo the trial
screenId = 1;
end
%% Flip it all %%
Screen('DrawTexture', window, reminder, [], reminder_loc, 0);
[VBLTimestamp, lastFlipTimestamp, FlipTimestamp, MissedFlip] = Screen('Flip', window);
flip_stamp = toc(mainstart);
%Send trigger to HR signal for each event
bitsiHR.sendTrigger(HR); % SEND HR TRIGGER
response = 0;
if presenttime == 0
while (response == 0 || response == 15) && ((GetSecs - lastFlipTimestamp )<= timeout)
[response, keyDownTimestamp] = bitsiboxButtons.getResponse(0.001, true);
end
RT=(keyDownTimestamp-lastFlipTimestamp);
if response == 0 %No answer: Too slow
screenId = 5;
elseif response == ButtonA || response == ButtonB %Answer
screenId = 4;
elseif response == ButtonF %Quit
quit = 1;
enter = 0;
manualclose = 1;
display(sprintf('Shop Task\tppnr: %i\t blocknr: %i\t trialnumber:%i', ppnr, block, trial));
bitsiHR.sendTrigger(c.HR_quit{condition_SA});
break
elseif ButtonE %Back to SG
enter = 0;
quit = 0;
break
else %Wrong button
screenId = 6;
end
end
%Hold it on screen
WaitSecs(presenttime);
%% Write data per Screen %%
%Save data of each screen
fprintf(fid, '%i\t%i\t%i\t%i\t%i\t%i\t%.6f\t%.6f\t%.6f\t%.6f\t%.6f\t%.6f\t%i\t%i\t%.6f\t%i\t%s\t%s\t%s\t%s\t%s\t%s\t%.2f\t%.2f\n', ppnr, block, condition_SA, ((block-1)*24)+trial, trial, screenId, presenttime, VBLTimestamp, lastFlipTimestamp, FlipTimestamp, MissedFlip, flip_stamp, HR, gotproduct, RT, response, c.yesno{yesno(1)}, c.yesno{yesno(2)}, condition, brand, product, filename, n_price, discountprice);
%Experiment finished
if length(c.trial(:,:,1)) < trial
run = 0;
enter = 0;
end
end
%Save info for random trial picker
trialpicker((trial-1),:) = {((block-1)*length(c.trial(:,:,1)))+(trial-1), gotproduct, n_price, discountprice, brand, product};
end
%Close bitsi's
close_bitsi;
catch me
me.message
me.stack.line
Screen('CloseAll');
close_bitsi
end
end