Social Exclusion and The Sense of Agency

Abstract

This thesis explored the effects of social exclusion on the sense of control. We indexed the sense of control using the sense of agency. The sense of agency refers to the feeling of control over our actions and the outcomes of those actions. We experience the sense of agency at an implicit, pre-reflective level. In other words, we routinely make movements that impact some sort of change in the environment, and simply just know that our actions cause an effect. Experimentally, we can measure the sense of agency using the intentional binding effect. Intentional binding is a temporal illusion in which we perceive the time between our voluntary action and the outcome of that action to be shorted compared to when the same effect is caused by an involuntary action. We conducted three experiments. In experiment one, we used an episodic memory recall task to prime participants to feel socially excluded or socially included. In experiment two, we used a different manipulation of social exclusion and social inclusion called Cyberball. We found that in both experiments, intentional binding was significantly reduced following social exclusion compared to social inclusion and baseline. In experiment three, we investigated the pre-reflective sense of agency in eating disorders. Eating disorders are highly associated with chronic social exclusion experiences and an altered sense of control in life. We found that individuals with higher eating disorder symptomatology experience a lower sense of agency, compared to healthy individuals. Overall, this thesis is the first to demonstrate that social exclusion has observable effects on the sense of agency. We were able to triangulate these findings using another social exclusion manipulation as well, strengthening our original findings. Lastly, we showed that a disorder characterized, in part, by social exclusion, reduces the sense of agency