## 2pPP5. Information integration of signal frequency.

### Session: Tuesday Afternoon, May 14

### Time: 2:00

**Author: Robert D. Irwin**

**Author: Daniel L. Weber**

**Location: Dept. of Psych., Wright State Univ., Dayton, OH 45435**

**Abstract:**

A listener's ability to integrate information can be evaluated by
presenting multiple samples in the distribution discrimination procedure. To
examine frequency discrimination with a 2IFC form of this procedure, each
interval contains samples drawn from one of two distributions of signal
frequency. The listener indicates which interval contained the sample(s) drawn
from the distribution with the higher mean. This experiment evaluated the
integration of frequency information in terms of improvement in frequency
discrimination for an increasing number of samples (n=1,2,3,4,5,6,8,12,16).
Seven listeners discriminated a ``standard'' distribution (means of 400, 565,
and 1000 Hz) from each of four ``comparison'' distributions (means of 401, 403,
406, and 414 Hz for the 400-Hz standard; 566.5, 569.5, 572, and 584 Hz for the
565-Hz standard; and 1002, 1005, 1010, and 1020 Hz for the 1000-Hz standard).
All samples were 100-ms sinusoids. All conditions were alike to an ideal
observer in that the distributions were normal with a standard deviation equal
to the difference between the means. The results indicate that integration of
frequency information appears constant across different frequencies when initial
performance is equated. [Work supported by AFOSR through WPAFB AL/CFBA.]

from ASA 131st Meeting, Indianapolis, May 1996