I am trying to measure the number of images and perhaps the duration that images are viewed for using medialab v2006.

so what I want to achieve.
There will be a set of 20 images which particiopants are given the option to view as many or few as they like.
How can I allow them to stop viewing the images ie choose to only see 4 images and then press a button to end this part of the experiment?

An alternative would be to time how long they veiw the images ie 'spend as much or as little time viewing the images as you choose'.

I would appreciate any advice on this.

Thank you

Naomi