||The present study compared the agreement between parents and peers on measures of college students' basic personality traits versus attachment styles. Because parents and peers view the students' behavior in two separate social contexts (home and school), higher agreement for traits versus attachment styles would support the hypothesis that attachment styles are behavior patterns that are contextualized within relationships. Students were asked to have a parent and same sex peer complete a basic trait measure (NEO-FFI) and an attachment style measure (ASQ) in exchange for course credit. Results indicated that the mean peer-parent agreement correlation was higher for the five NEO-FFI scores than for the five ASQ scores. Thus, the current study suggests that perceptions of attachment styles are more variable across observers than basic traits, and this finding supports the contextualization hypothesis. Recommendations for future research center on validating instruments of attachment styles.