This dissertation shows that the subjective experience of surprise and curiosity depends on where people are in their process of making sense. Part 1 focusses on surprise. It shows that to study... Show moreThis dissertation shows that the subjective experience of surprise and curiosity depends on where people are in their process of making sense. Part 1 focusses on surprise. It shows that to study surprise it is key to take the temporal dynamics of sense-making into account and to distinguish surprise (i.e., the response to the unexpectedness of an event) from the state that follows it after sense-making (i.e., the response to the valence of the event). Part 2 focusses on curiosity. It shows that anticipation is a key factor for how it feels to be curious. The closer people are to the resolution, the more they anticipate discovering new information, the more negative feelings of deprivation are reduced. Moreover, the more people anticipate that they can deal with complex novel things, the more curious they will become. Taken together, the findings in this dissertation show that people first need to master a situation of "not knowing" before they can appreciate it. Show less
We investigated the role of cortisol (an important stress-hormone) in the regulation of social fear and avoidance behavior in socially anxious individuals, which are characterized by extreme fear... Show moreWe investigated the role of cortisol (an important stress-hormone) in the regulation of social fear and avoidance behavior in socially anxious individuals, which are characterized by extreme fear and avoidance of social situations. Previous studies in animals and children showed a relation between increased fearfulness and avoidance and elevated cortisol levels, but the causal role of cortisol in these processes is not known. We found that, only in high socially anxious participants, cortisol administration or stress induction increased avoidance of social threat on an affect-evaluation computer task. Concurrent event-related potentials (brain activity measured with electrodes on the scalp) showed an associated increase in early processing of social threat. Another experiment indicated that the effects of cortisol on early threat processing are task dependent. We conclude that cortisol increases avoidance and facilitates or inhibits early processing of social threat in an adaptive manner, in line with the task goal. This effect is strongest in high anxious individuals, which are particularly sensitive to these threat signals. This knowledge can be relevant for the treatment of SAD, as cortisol levels may increase during exposure therapy, and also because cortisol administration has recently been proposed as a treatment for this disorder. Show less
