Abstract
One experiment explored the impacts of familiarity between female rats on the pro-social behavior. We trained pairs of Wistar rats in the Pro-social Choice Task. All pairs of rats had an actor and a partner rat that were placed within a double T-maze. Throughout the sessions, actors decided between two options only differing in the food delivered to the partner. In the selfish option only the actor received food, while the prosocial option produced additional food for a partner rat or an inanimate toy. Half of the actors lived in the same cage with their partner rats during the experiment (Familiar Group), whereas the other half only had contact in the double T maze (Stranger Group). We found that actor rats in the Familiar Group performed higher rates of the pro-social choice in the condition of the partner rats with respect to the toy; while the actor rats in the Stranger Group showed a similar levels of pro-social choices regardless of whether the partner was a rat or a toy.
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