||Self-concept differentiation (SCD) is the degree to which an individual's personality varies across discrepant social roles or contexts. Researchers have suggested that SCD is positively related to variables of psychological maladjustment such as anxiety and depression. However, previous studies have relied solely on self-ratings of personality, allowing only for the conclusion that self-perceived personality variation is associated with maladjustment. The current study intended to examine the relationship between psychological adjustment and observer reported personality variation, in addition to self-reported variation. The current study collected both self- and informant-ratings of personality across two distinct contexts. Sixty-six undergraduate students provided self-ratings using two NEO-FFI forms (Costa & McCrae, 1992) that contained contextualized items oriented for the home and school contexts, as well as the Personality Assessment Inventory (PAI; Morey, 1991). Additionally, one parent and one peer rated each target using a non-contextualized NEO-FFI, serving as informants for the home and school contexts, respectively. SCD and informant-contextual differentiation (ICD) were significantly positively correlated with a small effect size, suggesting a degree of independence between these two constructs. While both SCD and ICD were unable to predict levels of anxiety and depression, SCD was positively related to interpersonal passivity and identity problems whereas ICD was positively related to antisocial personality features. The results of the current study suggest that self-reported and informant-reported personality variation may be independent constructs that are related to unique variables of adjustment.