A search-by-clusters model of visual search: fits to data from younger and older adults.

ABSTRACT:

Objectives

This study aims to specify the processing operations underlying age-related differences in the speed and accuracy of visual search in a mathematical model.

Method

Eighteen older and 18 young adults searched for a predesignated target within 24-degree visual arrays containing distractors. Targets were systematically placed in regions that extended 2.5, 5.0, 7.5, and 10 degrees from center. Data were fitted to several versions of a mathematical model in which it was assumed that target search proceeds from the center fixation to peripheral areas in a succession of visual inspections of clusters until the target is located and that clusters can vary in size in response to search difficulty.

Results

Eccentricity effects on latencies and errors were larger for o

SUBMITTER: Hoyer WJ 

PROVIDER: S-EPMC3132265 | biostudies-literature | 2011 Jul

REPOSITORIES: biostudies-literature