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Re: identification task...negative d' values.
- To: AUDITORY@xxxxxxxxxxxxxxx
- Subject: Re: identification task...negative d' values.
- From: Daniel Oberfeld <oberfeld@xxxxxxxxxxxx>
- Date: Wed, 3 May 2006 09:41:05 +0200
- Delivery-date: Wed May 3 03:45:08 2006
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- Reply-to: Daniel Oberfeld <oberfeld@xxxxxxxxxxxx>
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Note that you could test if an *individual* d' value (that is, d'
observed for a given observer in a given condition) significantly
differs from 0 using a test described by
Gourevitch, V., & Galanter, E. (1967). A significance test for one
parameter isosensitivity functions. Psychometrika, 32, 25-33.
(cf. also Marascuilo, L. A. (1970). Extensions of the significance test
for one-parameter signal detection hypotheses. Psychometrika, 35, 237–243.)
The test is not very powerful however, so that interpretation of the
results should be taken with caution unless you have more than, say, 300
observations per data point.
Daniel
---------------------------
Dr. Daniel Oberfeld-Twistel
Universität Mainz
Institute of Psychology
Experimental Psychology
Staudingerweg 9
55128 Mainz
Germany
Phone ++49 (0) 6131 39 22423
Fax ++49 (0) 6131 39 22480
http://www.staff.uni-mainz.de/oberfeld/