Caregiver knowledge of early child development (ECD) may shape the developmental opportunities available to young children, yet few measures assess this knowledge during the preschool years, particularly in low- and middle-income countries (LMICs). This study developed and psychometrically evaluated the Caregiver Knowledge of Early Child Development Inventory (CKECDI) and examined associations between its domains and preschool children’s executive and motor functions in Nigeria. In Phase one, 517 caregivers completed the CKECDI. Exploratory factor analysis (n = 259) and confirmatory factor analysis (n = 258) supported a 35-item, four-factor structure comprising cognitive development, socioemotional caregiving, school readiness, and health, nutrition, and safety. The four-factor model demonstrated good fit (CFI = .994, TLI = .994, RMSEA = .013, SRMR = .078), with acceptable internal consistency across domains (KR-20 = .74–.90; ω = .74–.89). Known-groups validity was supported by significant differences in domain scores across caregiver educational attainment. In Phase two, the CKECDI was administered to an independent sample of 286 caregiver-child dyads. Adjusted path analyses showed distinct associations between CKECDI domains and children’s inhibitory control, working memory, cognitive flexibility, and motor function. The CKECDI provides a multidimensional assessment of caregivers’ knowledge of preschool child development in LMICs and may support developmental assessment and research in culturally and contextually diverse settings.

Depressive symptomatology (DS) is the presence of depressive symptoms in individuals whose presentation has not met diagnostic criteria for any depression but is associated with many unfavourable socioeconomicconsequences. This study investigated the effects of Rational Emotive Behaviour Therapy (REBT) and Client-Centred Therapy (CCT) on DS among adolescents in IDP camps in Borno State. The moderating effects of gender and health self-efficacy (HSE) were also examined. The study adopted a quasi-experimental design with a 3×2×3 factorial matrix. Ninety adolescents participated in the study. The Mood and Feelings Questionnaire, the Quick Inventory of Depressive Symptomatology for Adolescents and the HSE Scale were used. The data were analysed via ANCOVA. The results were considered significant at the p < 0.05 level. The participants’ average age was 14.04 ± 4.46 years; 51% were female, and 49% were male. There were significant main effects of treatments (REBT and CCT) on the reduction in DS. REBT was found to be more effective than CCT. The moderating effects of gender and the HSE were significant. It was concluded that REBT and CCT were effective in reducing DS. Counselling psychologists should incorporate both therapies in the treatment of DSs among adolescents in IDPs’ camps with due consideration to sex and the HSE, given priority to REBT.