Can not adjust reaction time?

it appears the reaction time cannot be adjusted, as each reaction following vehicle 2, is in the half second range, despite any change entered for t.

[Fu-Kwun Hwang]

You need to hit ENTER after you enter new value into the textfield (to tell computer that you have finish enter new value)

Please visit  Reaction time measurement   and try it again. It should work if you hit ENTER key!

[faizan123]

this is good post