optimal length of movie to evoke phsyiological response

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optimal length of movie to evoke phsyiological response

Postby Liza » 12 Feb 2014, 17:39

If you want to evoke different physiological responses (such as RSA, PEP and skin conductance) what length of time should a movie be in order to measure any physiological response?

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Joined: 20 Jan 2012, 21:03

Re: optimal length of movie to evoke phsyiological response

Postby jcndegeus » 19 Feb 2014, 18:24

That is a very general question...
A very general answer is that you are served best by conditions that last at least 1 minute for PEP (60-sec ensemble averages are an engrained habit).
For tonic SCL levels one minute seems OK too, but stimulus locked SCRs take only 5 seconds
For RSA based on the peak-valy method you need about 10 breaths (45 sec) but for HF power the DAMS software requires at lest 4 minutes.

Eco

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