Related Experiment Video
Updated: May 15, 2026

Holistic Facial Composite Creation and Subsequent Video Line-up Eyewitness Identification Paradigm
Published on: December 24, 2015
Two Out of Three Ain't Bad: Aggregating Multiple Identification Decisions from the Same Observer Improves Unfamiliar
Daniel Carragher1, Peter J Hancock2
1School of Psychology, College of Education, Behavioural and Social Sciences, Adelaide University, SA, Australia.
Combining multiple facial identification decisions from one person improves accuracy, similar to the "wisdom of the crowd" effect. However, crowds of different individuals still yield greater performance gains in face matching tasks.
Area of Science:
- Cognitive Psychology
- Forensic Science
- Human Perception
Background:
- Unfamiliar face matching accuracy varies significantly among individuals (60-90%).
- The
- wisdom of the crowd
- effect enhances group performance by aggregating diverse judgments.
- Previous research focused on combining decisions from multiple individuals.
Purpose of the Study:
- To investigate if aggregating multiple decisions from a single individual (
- wisdom of the crowd within
- ) improves unfamiliar face matching accuracy.
- To compare the performance gains from
- wisdom of the crowd within
- with the traditional
- wisdom of the crowd
- effect.
- To examine the impact of time delay on
- wisdom of the crowd within
- performance.
Main Methods:
- Participants repeatedly completed an unfamiliar face matching task.
- Experiment 1: Task completion within a single session.
- Experiment 2: Task completion over three weeks, with a time delay between sessions.
Main Results:
- A significant
- wisdom of the crowd within
- effect was observed, with accuracy increasing after two and three decisions.
- The time delay between sessions did not enhance performance.
- Groups of different individuals (
- wisdom of the crowd
- ) demonstrated larger performance improvements than individual aggregation (
- wisdom of the crowd within
- ).
Conclusions:
- Aggregating multiple self-decisions can improve individual performance on unfamiliar face matching.
- While
- wisdom of the crowd within
- offers benefits, combining judgments from diverse individuals remains more effective.
- Findings contribute to understanding decision-making processes in facial identification.
More Related Videos
07:34Perceptual and Category Processing of the Uncanny Valley Hypothesis' Dimension of Human Likeness: Some Methodological Issues
Published on: June 3, 2013
09:09Foreign Accent and Forensic Speaker Identification in Voice Lineups: The Influence of Acoustic Features Based on Prosody
Published on: September 27, 2024
Related Concept Videos
Causes of Similarity-Dissimilarity Effect
Factors Influencing Attraction III: Similarity
Facial Feedback Hypothesis
Association Areas of the Cortex
Prefrontal Association Area: This area is located in the frontal lobe and is involved in planning, decision-making, and moderating social behavior. It connects with primary motor areas,...
Self-Evaluation: Self-Enhancement and Self-Verification
Sign Test for Matched Pairs
To conduct the sign test, we first calculate the differences in value between...