Cognition and ageing
Motivational shifts and social selectivity
Similar to humans, aging monkeys show physical losses and reductions in social activity. To disentangle a general resource loss and the awareness of decreasing lifetime, we combined field experiments with behavioral observations in a large age-heterogeneous population of Barbary macaques (Macaca sylvanus) at La Forêt des Singes.
Differential ageing trajectories in cognitive tasks
Across the lifespan, the performance in problem-solving tasks varies strongly, owing to age-related variation in cognitive abilities as well as the motivation to engage in a task. To test age-related variation in inhibitory control, cognitive flexibility and persistence, we presented Barbary macaques (Macaca sylvanus), living at La Forêt des Singes in Rocamadour (France), with three problem-solving tasks.
Rathke E-M, Fischer J (2020)
Differential aging trajectories in motivation, inhibitory control and cognitive flexibility in Barbary macaques (Macaca sylvanus)
Philosophical Transactions of the Royal Society B: Biological Sciences 375(1811): 20190617 - DOI -
Almeling L, Sennhenn-Reulen H, Hammerschmidt K, Freund AM, Fischer J (2017)
Social interactions and activity patterns of old Barbary macaques: further insights into the foundations of social selectivity
American Journal of Primatology 79 (11): e22711 - open access -
Almeling L, Hammerschmidt K, Sennhenn-Reulen H, Freund A M, Fischer J (2016)
Motivational shifts in aging monkeys and the origins of social selectivity
Current Biology 26: 1744-1749 - DOI -