Research Group Description
We are investigating different psychometric theories that can be used to model how people respond to personality and attitude items. Each of the models is based on item response theory, which is a statistical framework used to better understand psychological test data.
The particular model that we are analyzing, the unfolding model, assumes that having too much of a personality trait may lead respondents to reject certain personality statements. For example, an extreme extravert may reject the item I enjoy going to parties some of the times because they enjoy going to parties all of the time.
These models have been used on personality inventories in the past, though very few items actually fit the unfolding model in a significant way. We have been analyzing data from several standard personality tests as well as experimentally manipulating items to try to induce different types of responding.