Alumni surveys are often used to gather information about graduates' post-college experiences. However, the study found that alumni who respond to surveys may not be representative of all graduates. Specifically, the study compared transcripts of psychology alumni who responded to a survey versus a random sample of graduates. It found that survey respondents had higher GPAs, better grades in specific classes, and participated in more intensive academic experiences than average graduates. While not typical, useful data can still be obtained from surveys, especially when related to undergraduate experiences and post-college outcomes.