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Influence of personality and experience on emotional decision-making in Mongolian gerbils (Meriones unguiculatus)
Einfluss von Persönlichkeit und Erfahrung auf emotionale Entscheidungsfindungen in Mongolischen Rennmäusen (Meriones unguiculatus)
Project Investigators: Dr. Marina Scheumann
Duration: January 2025 until December 2027
Project Details:
The monitoring and evaluation of emotions in animals is of increasing interest due to the public awareness on anima, welfare but also because laboratory animals serve as model species for the development of psychological drugs. The reliable evaluation of emotions is still a scientific challenge, as emotions are not only the result of automatic physiological reactions, but also underline cognitive evaluation processes (Kalat & Shiota, 2007). Thus, the emotional perception of a situation can depend on individual personality or experience. In order to be able to assess animal welfare, it is important to develop reliable methods for recording the emotional state of an animal. Although it is possible to determine an animal's condition using physiological measurements (e.g. blood sampling, implants to measure the heart rate), these measures are invasive and do not provide any information about the emotional valence of the condition (an increased heart rate occurs with both negative and positive emotions). An alternative is offered by behavioural tests that can be used to test the personality of animals as well as the emotional cognitive evaluation of a situation. One way of testing cognitive judgement is the ?Judgement Bias Task?. The animal learns to distinguish between a positive and a less positive stimulus and to react accordingly. They are then presented with an unknown ambivalent stimulus. Their reaction makes it possible to assess whether an animal is ?optimistic? (selects as with a positive stimulus) or ?pessimistic? (selects as with a positive stimulus). These findings will allow a better assessment of emotions in animals and can later be used to investigate the impact of different housing conditions, environmental enrichment or pharmacological effects on an animal's emotions.
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