# Comparing Visual Search Efficiency Across Different Facial Characteristics

## TL;DR

This study compares how quickly people can detect differences in facial identity, expression, ethnicity, and gender during visual search tasks.

## Contribution

The study provides new insights into how different facial characteristics are processed during visual search.

## Key findings

- Search times were significantly longer for identity differences compared to ethnicity differences.
- Performance in all tests did not follow a serial-search-terminating model.
- Results suggest shared early processing of facial characteristics with later differentiation into independent mechanisms.

## Abstract

Face recognition is an important skill that helps people make social judgments by identifying both who a person is and other characteristics such as their expression, age, and ethnicity. Previous models of face processing, such as those proposed by Bruce and Young and by Haxby and colleagues, suggest that identity and other facial features are processed through partly independent systems. This study aimed to compare the efficiency with which different facial characteristics are processed in a visual search task. Participants viewed arrays of two, four, or six faces and judged whether one face differed from the others. Four tasks were created, focusing separately on identity, expression, ethnicity, and gender. We found that search times were significantly longer when looking for identity and shorter when looking for ethnicity. Significant correlations were found among almost all tests in all outcome variables. Comparison of target-present and target-absent trials suggested that performance in none of the tests seems to follow a serial-search-terminating model. These results suggest that different facial characteristics share early processing but differentiate into independent recognition mechanisms at a later stage.