Millisecond Forums

Hi guys!

I want my participants to read instruction carefully and then a few consecutive pages with a story. It's crucial for me to know how long people spend on reading those information. I'd really appreciate if you could help me with getting the information how long a participant spend on reading instructions and other survey pages? 

I've already checked the forum (also this thread http://www.millisecond.com/forums/Topic15376.aspx?Keywords=survey with clock option but I don't know how to apply this without clock being visible for the participants). 

I'd like to avoid putting a random item/question to every page to get information about reaction times.

Thanks,
Gabriela