Self-Confirmatory Effects of Delay on Perceived Contribution to a Joint Activity

In the present experiment, groups of self-perceived extroverts and introverts engaged in getting acquainted conversations. Either immediately afterward or one week later, participants judged their own contribution to the conversation (percentage of time they had done the talking). The results revealed that controlling for actual amount of participation, extroverts' self-perceived participation tended to increase over time, whereas introverts' self-judged contributions decreased with time. Possible determinants of the observed self-confirmatory pattern of judgments are considered, and implications for work on egocentric biases are discussed.