Trying to get onset time of first keypress using a sliding scale in Psychtoolbox
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I have a slider which you can move left and right and I am trying to get the onset time of the first keypress. However, right now I only get the time for how long the rating scale is on the screen. Any suggestions?
Thanks in advance!
% Loop for scale loop
t0 = GetSecs;
answer = 0;
moved = 0;
firsttouch = 0;
while answer == 0
% Parse user input for x location
if strcmp(device, 'mouse')
[x,~,buttons,~,~,~] = GetMouse(screenPointer, 1);
elseif strcmp(device, 'keyboard')
[~, secsrating, keyCode, ~] = KbCheck;
if keyCode(responseKeys(2)) == 1 && firsttouch == 0
x = x - stepSize; % Goes stepSize pixel to the left
onset_rating = secsrating-t0;
firsttouch = 1;
elseif keyCode(responseKeys(2)) == 1 && firsttouch == 1
x = x - stepSize; % Goes stepSize pixel to the left
onset_rating=0;
elseif keyCode(responseKeys(3)) == 1 && firsttouch == 0
x = x + stepSize; % Goes stepSize pixel to the right
onset_rating = secsrating-t0;
firsttouch = 1;
elseif keyCode(responseKeys(3)) == 1 && firsttouch == 1
x = x + stepSize; % Goes stepSize pixel to the right
onset_rating=0;
end
else
error('Unknown device');
end
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