Set the timing to record RT?

[David McFarlane]

Martin,

What if you set the End Sound Action of your SoundOut object to 
Terminate?  Wouldn't that end the SoundOut as soon as your sound file 
ended (before the 1500 ms Duration of the SoundOut object) and then 
go on to collect your RT from there?

-- David McFarlane, Professional Faultfinder


>Dear all,
>
>I'm still a rookie in E-Prime and designing an ABX discrimination
>task. I got a question about the timing to record RT. Does anyone know
>how to set the timing to record RT in E-Studio 2.0? I looked up the
>user's guide and it says that RT is always recorded from the onset of
>the response logging event. However, this is not the way I want. I
>need to record RT right AFTER subject has heard the audio stimuli. I
>tried two different methods, but none of them gave me accurate RTs.
>
>The first thing I tried was making the sound object itself as the
>response logging event, but in that case, RT would be measured from
>the onset of the event, which was BEFORE the whole sound file has been
>played to the subject and the RT would include the duration of the
>sound "file", which was way longer than subject's actual response.
>
>The second thing I tried was adding a "Wait" object which records RT
>AFTER the sound object. The duration of the sound object was set to
>1500ms, but given that the length of sound files were all different,
>the wait object didn't immediately start right after the sound "file"
>was played. Rather, the wait object started after the whole 1500ms of
>sound object had elapsed. Now the problem is that subject may already
>start responding before the whole 1500ms has elapsed, so some parts of
>RT will be missing since subject starts responding before the wait
>object which records RT starts. So, does anyone have any idea to
>record RT right after the sound "file" has been played to the
>subject?
>
>Thank you in advance for your great help!!
>
>-Martin


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