Personality variation is eroded by simple social behaviours in collective foragers

Area of Science:

• Behavioral Ecology
• Social Dynamics
• Theoretical Biology

Background:

• Individual behavior and group movement are influenced by 'leader' individuals.
• Behavioral consistency, or 'personality', affects group position and leadership tendencies.
• Social environments can alter or suppress individual personality expression due to conformity.

Purpose of the Study:

• To develop a theoretical framework explaining personality suppression in social contexts.
• To investigate how aggregation behavior rules influence group movement and inter-individual differences.
• To identify conditions under which personality traits are repressed within a group.

Main Methods:

• Developed a simple individual-based model of group movement.
• Simulated a small group with varying tendencies for risky behavior (traveling from a safe site to a foraging site).
• Compared group behaviors under different rules of aggregation, focusing on attention paid to fellow group members.

Main Results:

• Increased attention to group members led to longer stays at the safe site.
• Following aggregation rules resulted in faster travel towards the foraging site once initiated.
• Demonstrated that social behaviors can repress consistent inter-individual differences.

Conclusions:

• Social attention and aggregation behaviors are key mechanisms for personality suppression in groups.
• Theoretical framework provides insights into the conditions favoring personality suppression.
• This study offers the first theoretical consideration of social mechanisms driving personality suppression.