Difference btw Reaction Time and Timestamp. (case 18891)

[soohyun1110]

Hello

I got the fill-in-the blank data by 'writing RT' and using 'Timestamp (@)' between two questions.

When I read the Help documentation, "response times is the time the subject continues to the next item,
and in Timestamp.csv, it includes the subject id, the variable name, the time at which the item *started* (e.g., 12:23:22), the milliseconds elapsed from the beginning of the experiment and the milliseconds passed since the last timestamp".

I didn't get the difference btw RT and "the milliseconds passed since the last timestamp".

Numbers are slightly different. (e.g., RT=4490; milliseconds passed since the last timestamp=4880)

Can I get more information regarding Reaction Time and Timestamp?

Best Regards.