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BTPS-EXP 53 Table 3 Pearson correlations between parent BTPS-exp and adolescent BTPS-exp total and subscale scores BTPS-exp scales N Pearson correlation Total barriers 663 0.25** Stressors and obstacles 662 0.16** Demands and issues 662 0.25** Perceived irrelevance 661 0.29** Problematic relationship with therapist 665 0.23** Note. BTPS-exp= Barriers to Treatment Participation Scale-Expectancies ** p < 0.01 Validity Expecting multiple barriers was significantly more likely in children with non-Dutch ethnicity, psychosocial problems, lower parental educational level, and living in other than a biological two-parent family (Table 4). For the adolescent BTPS-exp, expecting multiple barriers was only significantly associated with children’s psychosocial problems, both univariable and adjusted (Table 4). The association between children’s psychosocial problems and psychosocial care enrolment did not become less strong when controlling for the BTPS-exp and its interaction with psychosocial problems, for both the parents and adolescents (Table 5).