Reversing the signaled magnitude effect in delayed matching to sample: delay-specific remembering

Area of Science:

• Cognitive psychology
• Animal behavior

Background:

• Memory performance can be influenced by external cues.
• Understanding factors affecting memory recall is crucial in cognitive research.

Purpose of the Study:

• To investigate how reinforcer magnitude signaled during the retention interval affects memory accuracy in pigeons.
• To explore the relationship between memory performance, time delay, and attentional factors.

Main Methods:

• Pigeons were trained on a delayed matching-to-sample task.
• Reinforcer size (large or small) was signaled during the retention interval.
• Accuracy was measured under different cue conditions and cue switches.

Main Results:

• Memory accuracy was higher for large reinforcers than for small ones (signaled magnitude effect).
• Accuracy shifted in accordance with changes in the signaled reinforcer magnitude during the retention interval.
• This suggests memory performance is sensitive to cues presented after the initial learning phase.

Conclusions:

• Memory performance is not solely dependent on the passage of time but can be modulated by concurrent cues.
• Attentional mechanisms, influenced by external events like reinforcer cues, play a significant role in memory recall.
• Remembering may be delay-specific, influenced by the specific conditions during the retention interval.