title: A disjunctive analysis of neonatal approach stimulus prepotence.
abstract: Preliminary results of a disjunctive procedure developed to ascertain the relative attractiveness for domestic chicks of auditory and visual stimuli are promising. A detailed account of the procedure and initial results is presented. Seventy-two Canadian Athens random bred chicks were tested at 24 or 36 h posthatch. A repetitive tone (4 per sec, 50 msec duration, 500 Hz) served as the auditory stimulus, and a flickering light (3.5 flashes per sec, 0.8 foot candle) served as the visual stimulus. An age-dependent change in the attractiveness of auditory and visual stimuli obtained with the disjunctive procedure. No change in stimulus preference obtained when the stimuli were presented individually.
authors.affiliation: Department of Psychology, Virginia Polytechnic Institute and State University, Blacksburg, Va., U.S.A.
authors.forename: S E
authors.initials: SE
authors.lastname: Sigman
authors.forename: A H
authors.initials: AH
authors.lastname: Schulman