Psychological studies with children have difficulty recruiting participants and samples are more often selective. Given parental consent for children’s participation, this study examined parents’ perceived barriers and benefits of participating in studies and associated parental personality and psychopathological characteristics. Since there are hardly any instruments available so far, the study also aimed to develop questionnaires for the systematic and standardized assessment of barriers and benefits. One hundred and nine parents with children < 18 years completed questionnaires on willingness to participate, perceived barriers (Parents‘ Barriers for Participating in Research Questionnaire, P-BARQ) and benefits (Parents‘ Benefits for Participating in Research Questionnaire, P-BERQ), personality traits, trait anxiety, and psychopathological characteristics. The P-BARQ and P-BERQ showed overall acceptable model fits (TLI/CFI = .90–.94; RMSEA = .08/.14) and internal consistencies (α = .68–.86). Parents’ willingness to own participation in psychological studies and their support for children’s participation correlated negatively with perceived barriers to participation (r≥ ǀ-.32ǀ,p< .001). Parental personality traits (such as agreeableness/openness) showed positive associations with one’s own participation (r≥ .19,p< .005) and negative correlations with perceived barriers to participation (r≥ ǀ-.24ǀ,p< .001), while parental psychopathological characteristics are more closely related to consent to children’s participation (r= .24,p< .05). Parental trait anxiety showed both a positive correlation with perceived barriers (uncertainty) and benefits (diagnostics/help) (r≥ .20,p< .05). For the willingness to participate in studies, barriers seem to play a more crucial role than the benefits of participation. If more information is given about psychological studies, uncertainties and prejudices can be reduced.