Dear Shane,I am writing a CPT Identical Pairs (CPT-IP) script in PEBL, and I was a bit confused after read your discussion on d' calculation:
http://sourceforge.net/p/pebl/discussion/281130/thread/d87c5c31/#59e9
I am using PEBL0.13 and d'/beta computations in your pcpt script version 0.6 12/2011 and I get, for instance, in the pcpt report:
Target Acc Rate 0.645 Foil Acc Rate 0.933 Sensitivity (d') -1.869 Bias (beta) 0.814 but then, if I use your on-line non-parametric Signal detection statistics: http://mueller-linux.bio.mtu.edu:3838/aprime/ I get: False Alarm rate: 0.067 (= 1-0.933) Hit rate: 0.645 Statistic Value 1 Hit rate 0.645000 2 False alarm rate 0.067000 3 Zhang & Mueller Sensitivity (A) 0.870715 4 Zhang & Mueller bias (b) 1.908517 5 d' sensitivity 1.870369 6 beta (bias) 2.868050What I am really computing in PEBLv0.13 SDTDPrime and SDTBeta functions? Are they correct or not?... or what is my mistake?
Thank you in advance and best regards, -- Giuseppe Cabras, PhD - Chemistry, Physics and Environment Dept. InterUniversity Center for Behavioral Neurosciences http://icbn.uniud.it University of Udine - via delle Scienze, 206 - 33100 UDINE Phone: +39-043255-8212 - Fax: +39-043255-8222 SMS: http://www.fisica.uniud.it/cabras/SMS.html URL: http://people.uniud.it/page/giuseppe.cabras
smime.p7s
Description: Firma crittografica S/MIME
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