Overall, the nine-item scale demonstrated good internal consistency in adults (α = .819) and acceptable in adolescents (α = .72) for nine items and α = .75 without item 8.

Test-restest scores in adults (Manos et al, 2011) were mixed. BADS-SF total scores from Time 1 and Time 2 were significantly correlated (r = .451, p = .035), as were the activation (r = .608, p<.01) but not avoidance (r = .068, p = .762) scores.

The original development work in adults (Manos et al, 2011) identified a two-factor structure. The two factor structure was supported in adolescents (Duarte Peñalosa & Bianchi 2026)- excluding Item 8.

Construct Validity: The BADS-SF negatively correlated with measures of experiential avoidance, negative automatic thoughts, anxiety, behavioral inhibition, cognitive and behavioral avoidance, and behavioral disengagement. The BADS-SF positively correlated with quality of life and satisfaction (Manos et al, 2011).

Predictive Validity: Higher BADS-SF total scores and activation scored were positively and significantly associated with more time spent in high-reward activities BADS-SF avoidance scores were not associated with time spent in high-reward activities. (Manos et al., 2011). In adolescents validity analyses supported behavioural activation theory using depression and suicidal risk measures e.g., significant correlations were found between the total score on the BADS-SFA and its dimensions and the Centre for Epidemiologic Studies Depression Scale (CES-D) and PLUTCHIK Suicide Risk Scale. Medium to large negative correlations were found between Activation and CES-D and PLUTCHIK scores and large positive correlations were found between Avoidance and CES-D and PLUTCHIK scores (Duarte Peñalosa & Bianchi 2026).

Configural, metric, scalar and strict invaraince was found for gender in adolescents (two factor model excluding item 8) (Duarte Peñalosa & Bianchi 2026).