How can I define a time for a button to be pressed?

Hi!

I'm writting a code where I want a button (key or mouse) to be pressed when an image appears. I have used waitforbuttonpress but it stops the image until a button is pressed. I want to have the possibility of any button to be pressed when an imagem appears, but only for a limited time. My code is:

imshow(im_b);
      w=waitforbuttonpress;
      reaction=toc(tstart);
      imshow(im_preto);

However I want a waiting of 10 to 15seconds.

If anyone could help me I would appreciate. Thanks!

Answer 1

[Walter Roberson]

https://www.mathworks.com/matlabcentral/fileexchange/8297-getkeywait

... though it sounds to me as if you should be considering using PsychToolbox