Blocking between landmarks during 2-D (touchscreen) and 3-D (ARENA) search tasks with pigeons

Area of Science:

• Cognitive Psychology
• Animal Behavior
• Neuroscience

Background:

• Cue competition is a fundamental concept in associative learning.
• The blocking effect, a specific instance of cue competition, has been extensively studied.
• Previous research has primarily focused on non-spatial learning paradigms.

Purpose of the Study:

• To investigate the blocking effect in pigeons within a spatial search task.
• To determine if spatial blocking occurs in a landmark-based navigation paradigm.
• To compare findings across different experimental apparatuses (touchscreen and 3D navigation).

Main Methods:

• Pigeons were trained on a landmark-based spatial search task using two experimental setups.
• Phase 1 involved training with two landmarks (A and Z) and reward contingencies.
• Phase 2 introduced blocking trials (AX compound) and control trials (BY compound), followed by individual landmark testing.

Main Results:

• Pigeons exhibited poor spatial control by the novel cue (X) compared to previously trained cues (A and Y).
• This indicates a spatial-blocking effect, where prior learning interferes with new spatial associations.
• Results were consistent across both touchscreen and automated remote environmental navigation apparatus.

Conclusions:

• The study provides the first evidence of a spatial-blocking effect in pigeons.
• Findings support the generalizability of associative learning principles, like blocking, to spatial tasks.
• This research bridges the gap between traditional associative learning and spatial cognition research.