Capture reaction time to specific button press

Question

LG 2022-3-17

0
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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1674229-capture-reaction-time-to-specific-button-press

回答： LG 2022-3-18

I would like to measure how long it takes a user to press key 1 after display of an instruction key. I've tried using tic toc but from manually checking elapsed time, I know that the variable 'reaction' is not capturing the data correctly. Are there any other ways I could do this other than tic toc? Thanks

one=KbName('1!');
Screen('DrawText',win,'Please press 1',100,100)
Screen('Flip',win)
tic;
while KbEventAvail;
    [evt,n]=KbEventGet();
    if evt.Keycode==one & evt.Pressed==1;
        reaction=toc;
    end
end

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Answer 1

LG 2022-3-18

0
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1674229-capture-reaction-time-to-specific-button-press#answer_921249

在 MATLAB Online 中打开

I've found a solution through the following. Hope this helps others :)

one=KbName('1!');
Screen('DrawText',win,'Please press 1',100,100)
Screen('Flip', win)
onsetTime=GetSecs;
while KbEventAvail;
    [evt,n]=KbEventGet();
    if evt.Keycode==one & evt.Pressed==1;
        reaction=evt.Time - onsetTime;
    end
end