Measurement of cognitive abilities in Senescent Animals

Abstract

The behavioral paradigms used in investigating for differences in the cognitive abilities of young and aged animals are critically reviewed with regard to their power to discriminate between young and aged animals' mental capacity. Irrespective of the kind of task, geronto-behavioral research especially is afflicted with difficulties in controlling motivational and emotional influences on cognitive processes. It is hypothesized-somewhat provocatively-that most of the findings indicating an age-related decline are better attributed to the altered motivational status and/or emotional reactiveness than to impaired cognitive processes of senescent animals. Of the common tasks used in this field, it is concluded that complex mazes and different delayed response tasks seem to represent appropriate paradigms in order to study changed capacities in short- and long-term memory (working- and reference-memory, respectively).

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