Collective enumeration.

Area of Science:

• Cognitive Psychology
• Social Psychology
• Decision Science

Background:

• Joint decisions in daily life often rely on approximate enumeration.
• Understanding the psychological dynamics of collective counting is limited.

Purpose of the Study:

• To systematically investigate collective approximate enumeration.
• To explore factors influencing collaborative counting accuracy and sensitivity.

Main Methods:

• Pairs of participants performed individual and collective enumeration judgments in a 2-alternative forced-choice task.
• Disagreements were resolved through verbal negotiation, followed by accuracy feedback.

Main Results:

• Collective enumeration was superior to individual performance but fell short of predictions from models of collective sensory decision-making.
• Prior individual practice enhanced collective enumeration, indicating a need for substantial experience in social learning for enumeration.
• The collective context temporarily boosted individual enumeration sensitivity, possibly due to motivational factors.

Conclusions:

• Collective counting enhances performance but requires significant individual experience for effective social learning.
• Transient motivational factors, stemming from shared responsibility, may explain the temporary boost in enumeration sensitivity within a collective context.