key press/release & RT

[Courtney Griffin]

basically I want it to go something like this:

at stimulus display, read the clock and get the time (will name this 
variable T1)
after key release, read the clock and get that time (will name this 
variable T2)
at key press (final response), read the clock and get that time (will name 
variable T3)

RT (reaction time) = T2-T1
MT (movement time) = T3-T1


On Tuesday, October 30, 2012 2:26:31 PM UTC-4, Courtney Griffin wrote:
>
> Hello all,
>
> I am programming my first experiment with E-Prime and have run into some 
> issues I was hoping that someone might be able to help with. For my 
> experiment I will be having subjects simultaneously hold down two keys (u 
> and o), a stimulus is presented and they are to respond to it by releasing 
> one of the two keys and making a movement to another to respond ({TAB} or 
> {END}). Additionally, I would also like to record movement time (time from 
> release of key to response) and reaction time (time of release of one of 
> the initial keys). So far I have already gone in and allowed both Key 
> Presses and Releases. My issue is actually how to get the program to 
> recognize the release of the key and start recording the time, so I decided 
> to use the Clock.Read function, but I'm not sure exactly how to implement 
> it. Any assistance with this would be TRULY appreciated. Here is a bit of 
> the code I have come up with, but I know that I am probably nowhere near 
> where I need to be:
>
> Dim kbState As Integer
>
> Do
>
> If Keyboard.GetKeyState("u") = ebStatePress And _
> Keyboard.GetKeyState("o") = ebStatePress Then 
>
> If kbState = Keyboard.GetKeyState ("{END}")= 0 Then
> Clock.Read
>
> ElseIf kbState = Keyboard.GetKeyState ("{TAB}") = 1 Then
> Clock.Read - Stimulus.OnsetTime
>

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