222015-04-14 15:29:31PeterWatson212013-03-08 10:17:25localhostconverted to 1.6 markup202007-07-10 12:53:24PeterWatson192007-07-10 12:53:09PeterWatson182007-07-10 12:52:43PeterWatson172007-07-10 12:50:29PeterWatson162007-07-10 12:50:20PeterWatson152007-07-10 11:20:29PeterWatson142007-07-10 11:20:05PeterWatson132007-07-05 12:27:53PeterWatson122007-07-05 12:27:43PeterWatson112007-01-25 16:06:35PeterWatson102006-07-27 11:20:30pc0082.mrc-cbu.cam.ac.uk92006-07-26 15:32:44pc0102.mrc-cbu.cam.ac.uk82006-07-26 15:29:33pc0102.mrc-cbu.cam.ac.uk72006-07-26 11:24:16pc0082.mrc-cbu.cam.ac.uk62006-07-26 11:18:53pc0082.mrc-cbu.cam.ac.uk52006-07-26 11:15:15pc0082.mrc-cbu.cam.ac.uk42006-07-26 11:12:23pc0082.mrc-cbu.cam.ac.uk32006-07-26 11:11:36pc0082.mrc-cbu.cam.ac.uk22006-07-26 11:07:28pc0082.mrc-cbu.cam.ac.uk12006-07-26 11:03:18pc0082.mrc-cbu.cam.ac.uk

Dprimes and Betas may be computed in SPSS using the probit function. The UCLA statistics department give further details. They suggest values upto 2 are typical dprime values. A table showing dprime values for true positives and false alarm combinations is available. Also available by typing sigdet at a UNIX prompt Excel syntax available here. [CUT AND PASTE SPSS SYNTAX BELOW INTO A SYNTAX WINDOW AMENDING DATA AS REQUIRED] * Multiple invocations of the macro in the same interactive session will produce the following note: >The macro name specified on the DEFINE command duplicates the name of a previously defined macro. This instance will take precedence. This warning does not indicate a problem and may be ignored.