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. Author manuscript; available in PMC: 2014 Oct 30.
Published in final edited form as: Soc Neurosci. 2009 Oct 7;5(2):201–220. doi: 10.1080/17470910903268931

Table 2.

Signal Detection Bias and Sensitivity Measures as a Function of Face Primes

Scores Face Primes
White Black Middle-Eastern (Western) Middle-Eastern (Traditional)
False Alarms (z) −1.87 −0.66 −1.13 −0.70
Hits (z) 0.32 0.43 0.11 0.75
Bias (c) 0.78 0.07 0.51 −0.02
Sensitivity (d′) 2.19 0.98 1.24 1.45

c = −.5(zH + zFA)

Using the SPSS computational formula, c = −.5*[PROBIT(Hits) + PROBIT(False Alarms)]

d′ = zH − zFA