Prosocial tendencies measure validation for Portuguese late adolescents

The Prosocial Tendencies Measure (PTM; Carlo & Randall, 2002) is widely used for assessing prosocial tendencies. Assuming that there are differences in prosocial behavior between adolescents and adults, the current study aimed to further validate the Portuguese version of the PTM for adolescents. This instrument assesses six different types of prosocial tendencies – altruism, anonymous, dire, emotional, compliant and public. Designed to confirm this structure with Portuguese adolescents, this study collected a total of 1313 high school students’ prosocial behaviors perceptions. Confirmatory factor analysis corroborated the six-factor structure of the original validation. Furthermore, considering the students’ school year and gender, invariance analysis was executed and attested the PTM’s configural, metric (partially for gender) and scalar (partially for school year and gender) invariance. These findings further demonstrate that the Portuguese version of the PTM is reliable, enhancing the utility of this instrument to assess prosocial behaviors in adolescence.