This study analyzes the effects of congruence and incongruence in paternal and maternal involvement on adolescents’ internal locus of control. A sample of 680 adolescents was assessed using the Parental Involvement Behavior Questionnaire and the Internal Locus of Control Scale, and response surface analyses were conducted. Results revealed that: (1) Under conditions of parental involvement congruence, adolescents exhibited significantly higher levels of internal locus of control in low paternal–