Blocking continue button

Hallo,

I would like to block continue button for a single questionnaire within an experiment file so that subjects cannot click it.

I've already tried a timed item by using the parameter duration but all that happens is a timer to be seen on screen counting down the time. (What I don't want because subjects must not know how much time remains). and the continue button still remains active.

Please help! Thanks!

Sounds like you might be using a negative duration value (e.g., d-300)? If so, try using a positive one like (d300). If that doesn't work, let me know.

I have already tried out both but it does not work! :-(((

Can you attache your exp and que files? I'll take a look.