Global prosocial behavior or social competence measures are limited because prior researchers have shownthat there are different types of prosocial behaviors and that each of these types has different personal and situational correlates. Some researchers have presented evidence that there are differences between individuals who help others when they are asked to and those who do so spontaneously (Eisenberg et al., 1981). Other researchers have shownthat there are individual differences in children who exhibit prosocial behaviors in high vs. low emotionally evocative situations (Carlo et al., 1991a). Furthermore, some helping behaviors are motivated by internalized norms/principles and sympathy responding and other helping behaviors are motivated by extrinsic motivators (e.g., gaining the approval of others) (Eisenberg and Fabes, 1998). The use of global, rather than situation-specific, assessments of prosocial behaviors has been presented as one possible explanation for prior weak and inconsistent relations between sociocognitive and socioemotional variables and prosocial behaviors (Carlo et al., 1991b; Kurdek, 1978; Underwood and Moore, 1982). Thus, global measures of prosocial behavior might limit investigators’ ability to address specific conceptual questions regarding the correlates of prosocial behaviors. In contrast, situation-specific prosocial behavior measures are useful in addressing specific conceptual questions about the development and correlates of different types of prosocial behaviors. Furthermore, observational and behavioral assessments of these behaviors might be considered more ecologically valid than paper-and-pencil measures. However, there are potential limitations to the use of these measures. First, these measures are susceptible to observer and coding biases. Second, some of these measures require individual assessment; thus, these measures might be costly in time and often preclude the assessment of prosocial behaviors in applied settings and in longitudinal studies. And third, evidence of the psychometric qualities of these types of measures is often limited to the evidence presented in the particular study for which it was designed. Researchers have pointed out that standardization of measures is necessary to enable researchers to compare and integrate findings across studies. Furthermore, there is no existing paper-and-pencilmeasure of specific types of prosocial behaviors to use with late adolescents. Given the evidence for changes in prosocial behaviors and theoretically related personal and social contextual variables (e.g., moral reasoning, perspective taking, sympathy, parent and peer relationships) during adolescence (Carlo et al., 1999a; Fabes et al., 1999), an objective measure of prosocial behavior was constructed and designed to assess different types of prosocial behaviors in late adolescents.