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Monkey memory: same/different concept learning, serial probe acquisition, and probe delay effects.

A A Wright, H C Santiago, S F Sands

Journal of Experimental Psychology. Animal Behavior Processes

|October 1, 1984

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Rhesus monkeys improved memory performance with novel stimuli by changing training items daily. They learned a serial-probe-recognition task faster than pigeons, showing varied memory recall based on list position and delay.

Area of Science:

Cognitive Neuroscience
Primate Behavior
Comparative Psychology

Background:

Understanding memory mechanisms in non-human primates is crucial for comparative cognition research.
Rhesus monkeys offer a valuable model for studying complex cognitive processes like memory.
Previous studies have explored primate memory, but direct comparisons with other species like pigeons are less common.

Purpose of the Study:

To investigate the learning and memory capabilities of rhesus monkeys using same/different and serial-probe-recognition tasks.
To assess the impact of training stimuli variability on novel stimulus transfer performance.
To compare the acquisition speed and memory recall patterns of rhesus monkeys with those of pigeons.

Main Methods:

Monkeys were trained on a same/different task, with daily changes to training stimuli to assess transfer learning.

Related Experiment Videos

Monkeys were subsequently trained on a serial-probe-recognition (SPR) task with variable list lengths.

Memory recall was tested at various delays (0-30s) using a fixed list length, analyzing serial-position effects.

Main Results:

Initial transfer performance on novel stimuli was poor (55%) but improved significantly (85%) with daily training item changes.
Monkeys acquired the SPR task more rapidly than pigeons, demonstrating efficient list learning.
Serial-position functions in the SPR task showed recency effects at short delays and primacy effects at longer delays (30s).

Conclusions:

Rhesus monkeys demonstrate robust learning and memory flexibility, particularly with adaptive training strategies.
Comparative analysis suggests rhesus monkeys possess more rapid serial list learning capabilities than pigeons.
The observed serial-position effects provide insights into the temporal dynamics of memory recall in primates, aligning with established memory theories.