Mason Lab

Exploring empathy and helping behaviour in rats


At the Mason Lab, we are currently interested in the presence of empathy and helping behaviour in rats.

empathy - /ˈempəTHē/

the feeling that you understand and share another person's experiences and emotions : the ability to share someone else's feelings

Rats will deliberately, intentionally, and rapidly free a trapped cage-mate.

In collaboration with Professor Jean Decety and graduate student Inbal Ben-Ami Bartal, we developed a paradigm in which rats show pro-social behavior (Ben-Ami Bartal, Decety, and Mason 2011). For 12 daily sessions of an hour each, a rat is placed in a restrainer while his cage-mate is free to roam in the arena. The restrainer has a door that can be opened only from the outside by the free rat. For a rat, the door is moderately difficult to open and the they cannot use vision alone to deduce how to open it. Instead, the free rat must discover how to open the door by trial and error.

Rats have to figure out their own way to open a restrainer. Here's a video showing the three most common tactics used by rats.

Empathy facilitates social cohesion. Empathy increases the inclusive fitness of organisms by enhancing survival in a variety of ways (e.g., providing increased defence against predators) and serves to bond individuals to one another, especially mothers to offspring. The most basic expression of empathy is emotional contagion, the transfer of an emotional state from one individual to another. This capability has been shown to exist in both humans and non-human animals.