Date of Graduation

Summer 7-1-2025

Document Type

Thesis

Degree Name

Master of Science (MS)

Department

Psychology

Thesis Chair

Dawn R. Weatherford

Abstract

This study investigated a possible bias in face-matching and ID-screening decision making- color incongruity (i.e., one face image presented in color and one in grayscale). Expanding on previous research, the 2x2 mixed methods experiment incorporated eye tracking measures (i.e., fixations). Participants N= 25 were randomly assigned to compare color or grayscale IDs (between groups comparison) to a 10 s color video of a person moving their head side to side. The task consisted of 2 practice and 48 face-matching trials with medium prevalence (MP, 24 match, 24 mismatch) presented as one of four pseudo-random and counterbalanced orders. Signal detection indices (discriminability (d′) and response bias (c)) calculated by participant showed no significant difference between groups. However, ANOVAs for fixation count and duration indicated a significant interaction of congruence and area of interest (AOI). These findings suggested that color IDs and face area AOIs increase fixation count and duration.

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