Re: [R] Re action Time and Time Series Analysis

From: Ingmar Visser <i.visser_at_uva.nl>
Date: Fri, 07 Mar 2008 09:52:03 +0100

Nathanael,

On 7 Mar 2008, at 09:40, nathan3073 wrote:

>
> Dear,
> I need to analyse reaction time.
>
> The general idea might be described as this: There are 8x8 circles. My
> program light a circle at one time. The subject then click the lighted
> circled as fast as possible. After the correct circle is clicked,
> then the
> next circle will be lighted for the subject to click on, and so on.
>
> My questions are:
> 1. May I use Time Series Analysis? I read that Time Series may be
> used only
> for data with regular measurement interval. Can my experiment be
> considered
> as regularly measured?

Is the precise timing of new responses expected to influence the RTs? If so, the answer
is probably no.

> Let's assume there are 30 subjects. Each has 330 measured reaction
> time. I
> then plot the response time as time series.
> 2. I need to know if the plots can be classified to groups with
> different
> characteristic.

This sounds like you need some kind of cluster or mixture analysis, however ....

> That is, I want to check whether there is model (or models)
> my plots follow. I've read about ARIMA or somekind of model fitting
> but have
> no idea about the general concept. Would someone give me some
> insight?? How
> to do that with R-Language?

... whether you can do this depends on your specific hypotheses.

Possibly a simple linear model answers most of your questions.

Best, Ingmar

> Just for additional request, might I know some paper that use time
> series
> for analyzing reaction time? I've searched with Google for nearly 2
> hours
> but most of the paper I'm looking for are not free. I would
> appreciate if I
> could get real case study.
>
> Thank you for the help.
>
> regards,
> Nathanael Gratias
> indonesia
> --
> View this message in context: http://www.nabble.com/Reaction-Time-
> and-Time-Series-Analysis-tp15891094p15891094.html
> Sent from the R help mailing list archive at Nabble.com.
>
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Ingmar Visser
Department of Psychology, University of Amsterdam Roetersstraat 15
1018 WB Amsterdam
The Netherlands
t: +31-20-5256723

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