auditory secondary task

[Michiel Spape]

Hi Antonello,
How new are you to E-Prime? If the answer is "very new", I will predict you'll have quite some difficulty getting this to work - indeed, how you seem to suggest you would like to do this suggests this may well be the case. That is, E-Prime slightly forces you to do things in a time-locked (to use an ERP term) manner: read single word, detect response to task1, detect respond to task 2, is quite easy, but 'go on reading while detecting single responses continuously'... not so much. That said, if you'd have a single slide with, say, a page of text and a sound stimulus on it, you can collect multiple responses (in advanced properties of responses/timing tab). Then, you'd have to code stuff so that the response times of these responses are all recorded.
It occurs to me, however, you might be able to do it in a less complex way (even if it will look a bit ugly):
Make a list for your trials (say TrialList). Code at least ALL text you want your subject to read (might well be a page? Use \n for new lines) as an attribute (say myStory) such that each trial has something else to read. Let the procedure within that TrialList refer to another list (say SubTrialList) with at least one attribute, say mySoundfile. Record both empty and non-empty soundfiles (for timing purposes), say "empty.wav" and "beep.wav" and fill your SubTrialList with these two. Now, if you want a single trial to have, say, 20 beeps and 80 silences, each of 1 second long (or 10 ms beep and 990 ms silence), just have [mySoundfile] refer to 20 beeps and 80 silences. For each SubTrialList level, use the same procedure, with, in it, at least one (or two, if you want to record whether subjects press a button BEFORE the onset of the stimulus) slide. The slide then has text [myStory] and sound [mySoundfile]. As said, it's probably best to have another, but similar slide before this slide, such that you can collect responses that precede the sound (anticipatory responses). This has, as a benefit, that you can thereby randomise the duration of the intervals between beeps. 

Oh, and try to be a bit more specific in your question: where did you get stuck? Unless you prefer someone actually to make your experiment - might be a bit more expensive though.
Best,
Mich


Michiel Spapé
Research Fellow
Perception & Action group
University of Nottingham
School of Psychology

-----Original Message-----
From: e-prime at googlegroups.com [mailto:e-prime at googlegroups.com] On Behalf Of Antonello
Sent: 20 April 2010 08:39
To: E-Prime
Subject: auditory secondary task

Hi, I'm new in using E-prime. I want to create that:

While the participants read a narrative text, they are involved in
detecting pure tone (presented in a random time manner) in a secondary
task. How can I do that? I am interested in record either reaction
times about the secondary task either in record reading duration time.

Thanks in advance

Antonello

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