aprime¶

Download [hi-res] [pdf]

class sdt_metrics.aprime(methodname, add_prob_method=False)¶

A’: Non-parametric measure of sensitivity

Devised by Pollack and Norman [1] but was reformalated and popularized by Grier [2]. Smith [3] provides a nice historical overview, literature review, and analysis of A’.

See also

amzs()

[1]	Pollack, I., Norman, D. A. (1964). A non-parametric analysis of recognition experiemnts. Psychonomic Sicence 1, 125-126.

[2]	Grier, J. B. (1971). Nonparametric indexes for sensitivity and bias: Computing formulas. Psychological Bulletin, 75, 424-429.

[3]	Smith, W. D. (1995). Clarification of Sensitivity Measure A’. Journal of Mathematical Psychology 39, 82-89.

classmethod direct(*args)¶

Calculates metric based on hit, miss, correct rejection, and false alarm counts

static prob(*args)¶

Calculates metric based on hit rate and false alarm rate

classmethod __call__(*args)¶

based on the number of args and the availability of .prob routes call to appropriate method.