Individuals in larger groups are more successful on spatial discrimination tasks

Area of Science:

• Behavioral Ecology
• Cognitive Science
• Animal Behavior

Background:

• Individual cognitive abilities are crucial for understanding natural selection.
• Social environment significantly influences cognitive performance within and between species.
• Limited research exists on how group size affects individual cognitive variation.

Purpose of the Study:

• To investigate the impact of social environment, specifically group size, on individual learning performance.
• To determine if group size influences cognitive flexibility and problem-solving abilities.
• To highlight the importance of considering social context in cognitive assessments.

Main Methods:

• A within-subjects design was employed with adult female pheasants (Phasianus colchicus).
• Individuals were housed in groups of three and five, experiencing both conditions in a counterbalanced order.
• Two spatial discrimination tasks with distinct cue sets were administered to assess learning performance.

Main Results:

• Pheasants in larger groups (five individuals) demonstrated higher learning success rates compared to those in smaller groups (three individuals).
• Individuals showed improved performance on their second task, indicating a learning effect independent of group size.
• Cognitive performance was significantly influenced by the immediate social environment.

Conclusions:

• The social environment plays a critical role in modulating individual cognitive performance.
• Cognitive capacities are flexible and responsive to the immediate social context.
• Future research should explore the underlying mechanisms connecting social environment and cognitive expression.