Accession Number : ADA135905

Title :   Pattern-Directed Attention in Uncertain Frequency Detection.

Descriptive Note : Technical rept.,

Corporate Author : CATHOLIC UNIV OF AMERICA WASHINGTON D C HUMAN PERFORMANCE LAB

Personal Author(s) : Howard,J H , Jr ; O'Toole,A J ; Parasuraman,R ; Bennett,K B

PDF Url : ADA135905

Report Date : 14 Oct 1983

Pagination or Media Count : 41

Abstract : The role of early pattern components as cues in uncertain frequency detection was investigated in four probe-signal experiments. Listeners heard consecutive presentations of a 12-tone pattern in a noise background. One presentation of the pattern was complete whereas the other was missing the eleventh(primary) tone. Listeners were required to indicate which presentation was complete. On 20% of the test trails, the eleventh component of the complete pattern was replaced with one of four probe tones. The results indicated that listeners were more sensitive to the primary tone than to probe tones but this selective sensitivity changed on a trail-by-trail basis as a function of the attentional cues provided by early pattern components. The data suggested two cue functions: (1) an 'informational' function in providing information regarding which primary tone is likely to occur on a given trail, and (2) a 'frequency' function that 'automatically' directs listening to an appropriate frequency range and narrows or 'fine tunes' the listening band.

Descriptors :   *Auditory perception, *Performance(Human), *Detection, Patterns, Frequency, Theory

Subject Categories : Psychology

Distribution Statement : APPROVED FOR PUBLIC RELEASE