Effects of changeover delay on response allocation during probe tests.

Area of Science:

• Behavioral Psychology
• Animal Cognition
• Operant Conditioning

Background:

• Studies on choice behavior often focus on reinforcement rates.
• The role of secondary factors, such as dwell time, in decision-making is less understood.
• Pigeons are a well-established model for studying choice behavior.

Purpose of the Study:

• To investigate if pigeons' choice patterns generalize to novel situations.
• To determine if stimuli associated with longer dwell times are preferred.
• To assess the influence of changeover delay (COD) on choice preference.

Main Methods:

• Pigeons were trained on a two-component multiple schedule with concurrent variable-interval (VI) schedules.
• Two different changeover delays (COD: 1s and 10s) were used in different components.
• Probe tests with novel combinations of alternatives were presented.

Main Results:

• Pigeons consistently showed longer dwell times with the longer COD (10s) during training.
• In probe tests, pigeons preferred alternatives trained with the longer COD, even when reinforcement rates were identical.
• Preference was observed for a VI 40-s alternative trained with a long COD over a VI 80-s alternative trained with a short COD.

Conclusions:

• Stimuli associated with longer changeover delays (COD) and dwell times are preferred by pigeons.
• Choice preference is influenced by factors beyond the rate of primary reinforcement.
• Findings suggest that dwell time plays a significant role in choice behavior.