Related Experiment Video
Updated: Aug 3, 2026
07:34
Perceptual and Category Processing of the Uncanny Valley Hypothesis' Dimension of Human Likeness: Some Methodological Issues
Published on: June 3, 2013
Dual-target cost in visual search for multiple unfamiliar faces
Natalie Mestry1, Tamaryn Menneer1, Kyle R Cave2
1Department of Psychology, University of Southampton.
Summary
Searching for two unfamiliar faces is slower and less accurate than searching for one. Performance is better for a "preferred" target face, but capacity for the "non-preferred" face can improve with practice.
Area of Science:
- Cognitive Psychology
- Visual Perception
- Human Factors
Background:
- Visual search efficiency is crucial for tasks involving target identification.
- Understanding limitations in dual-target search is key to optimizing search strategies.
- Face recognition involves complex cognitive processes that can be capacity and guidance limited.
Purpose of the Study:
- To investigate capacity and guidance limitations in dual-target visual search for unfamiliar faces.
- To determine how visual similarity affects face search performance.
- To explore potential improvements in dual-target face search through practice.
Main Methods:
- Manipulated visual similarity of distractor faces using morphing and multidimensional scaling.
- Compared search performance (speed and accuracy) in single-target versus dual-target conditions.
- Analyzed eye movement data to assess fixation guidance.
Main Results:
- A significant dual-target cost was observed, with slower and less accurate search.
- Performance varied between targets, with a 'preferred' and 'non-preferred' target identified.
- Reduced representational capacity was found for the non-preferred target, which improved after single-target practice.
- Eye movement analysis indicated weak guidance in single-target search and for the preferred target in dual-target search.
Conclusions:
- Dual-target face search is constrained by both capacity and guidance limitations.
- Search performance is superior for one target over the other in dual-target scenarios.
- Individual learning of target faces can enhance representational capacity for subsequent search tasks.
More Related Videos
Related Concept Videos
01:05Difference from Background: Limit of Detection
The limit of detection (LOD) is the smallest amount of analyte that can be distinguished from the background noise. The LOD value corresponds to the concentration at which the analyte signal is three times larger than the standard deviation of the blank signal. Below this value, the analyte signal cannot be differentiated from the background noise. It is calculated by dividing the calibration slope by 3 times the standard deviation of the blank signals.
The LOD indicates the presence or absence...
The LOD indicates the presence or absence...
01:21Association Areas of the Cortex
Association areas are regions of the cerebral cortex that do not have a specific sensory or motor function. Instead, they integrate and interpret information from various sources to enable higher cognitive processes such as memory, learning, and decision-making. Some key association areas include the following:
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,...
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,...
01:20Parallel Processing
The brain processes sensory information rapidly due to parallel processing, which involves sending data across multiple neural pathways at the same time. This method allows the brain to manage various sensory qualities, such as shapes, colors, movements, and locations, all concurrently. For instance, when observing a forest landscape, the brain simultaneously processes the movement of leaves, the shapes of trees, the depth between them, and the various shades of green. This enables a quick and...
01:24Prosopagnosia
Prosopagnosia, also known as face blindness, is the inability to recognize faces. In severe cases, individuals with prosopagnosia may not recognize close family members, including parents and spouses, by their faces. For instance, someone with prosopagnosia might walk past their child in a crowd, only realizing their mistake upon noticing their child's distinctive backpack or favorite jacket. Prosopagnosia specifically impairs facial recognition, while the recognition of other objects or...