Context-dependent preferences in starlings: linking ecology, foraging and choice

Area of Science:

• Behavioral Ecology
• Animal Cognition
• Decision Theory

Background:

• Foraging animals often face choices between multiple options, leading to debate on how preferences are formed.
• Ecological models emphasize option attributes, while decision theory focuses on relative comparisons during choice.
• Integrating these perspectives is crucial for understanding animal decision-making mechanisms.

Purpose of the Study:

• To test the Sequential Choice Model, which posits that value acquisition depends on learning context and absolute attributes, and choices are made independently.
• To investigate whether preferences are constructed through relative judgments at the time of choice or based on pre-existing values.
• To link ecological reasoning with decision models in European starlings (Sturnus vulgaris).

Main Methods:

• European starlings were trained to obtain food rewards associated with different stimuli in distinct learning contexts.
• Response latencies to individual options were measured as a proxy for option value.
• Simultaneous choice tests were conducted using options equated for absolute properties to assess preference formation.

Main Results:

• Option value was influenced by both delay to reward and the learning context, with response latencies ranking LA≈LC
• Starlings showed consistent preferences (A5 over C10, C10 over B10) in simultaneous choices.
• Preference magnitude correlated with latency differentials, and no deliberation time was detected.

Conclusions:

• Animal preferences reflect learned values influenced by context, not solely relative comparisons at the moment of choice.
• The Sequential Choice Model effectively predicts choice behavior, suggesting independent processing of options.
• Decision mechanisms adapted for sequential choices appear robust for predicting simultaneous choice outcomes.