dprime.ABX | R Documentation |
Calulate d'
for ABX paradigm either
assuming a differencing strategy or independent observations
dprime.ABX(Hits, FA, zdiff, Pc.unb, method = "diff")
Hits |
numeric in [0, 1] corresponding to Hit rate |
FA |
numeric in [0, 1] corresponding to False alarm rate |
zdiff |
numeric. Difference of z-scores for Hit and False Alarm rates |
Pc.unb |
numeric in [0, 1]. Proportion correct for an unbiased observer,
|
method |
character. Specifies the model to describe the observer's criterion for dividing up the decision space, must be either "diff" for a differencing strategy (the default) or "IO" for independent observations. |
Two different strategies have been described for how the
observer partitions the decision space in the ABX
paradigm, either based on Independent Observations of
each stimulus or on a differencing strategy. The differecing
strategy is the default. d'
can be calculated
either from the H
and FA
rates, from the difference of
z-scores or from the probability correct of an unbiased observer.
Returns the value of d'
Kenneth Knoblauch
MacMillan, N. A. and Creeman, C. D. (1991) Detection Theory: A User's Guide Cambridge University Press
Green, D. M. and Swets, J. A. (1966) Signal Detection Theory and Psychophysics Robert E. Krieger Publishing Company
dprime.mAFC
, dprime.SD
,
dprime.oddity
dprime.ABX(H = 0.75, F = 0.3)
dprime.ABX(H = 0.75, F = 0.3, method = "IO")
dprime.ABX(zdiff = qnorm(0.75) - qnorm(0.3))
dprime.ABX(Pc.unb = pnorm( (qnorm(0.75) - qnorm(0.3))/2 ))
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