title: Effect of decision weights and internal noise on the growth of d' with N.
abstract: A general finding of psychoacoustic studies is that detectability d' of a noisy signal grows less than optimally with the number N of independent observations of the signal. Competing accounts implicate internal noise common to all observations or nonoptimal decision weights given to observations. A discriminant analysis of listeners' trial-by-trial responses in a multitone level-discrimination task favored the latter account.
authors.affiliation: Auditory Behavioral Research Lab, Department of Communicative Disorders, University of Wisconsin, Madison, Wisconsin 53706, USA. ralutfi@wisc.edu
authors.forename: Robert A
authors.initials: RA
authors.lastname: Lutfi
authors.forename: Lynn
authors.initials: L
authors.lastname: Gilbertson
mesh_terms: D000161:Acoustic Stimulation; D000293:Adolescent; D000328:Adult; D001299:Audiometry; D001307:Auditory Perception; D016002:Discriminant Analysis; D005260:Female; D006801:Humans; D016015:Logistic Models; D008297:Male; D008962:Models, Theoretical; D009622:Noise / Q000009:adverse effects*; D010470:Perceptual Masking; D011571:Psychoacoustics; D021641:Recognition, Psychology; D017603:Signal Detection, Psychological; D055815:Young Adult
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