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Impact of Developmental Milestone Education on Recognition of Developmental Delays among Parents of Under-Five Children in Nigeria

Abstract

Early childhood is a critical period of physical, cognitive, language, social, and emotional development, during which developmental delays may affect children's learning, communication, behaviour, independence, and overall wellbeing. Parents and caregivers play an important role in observing children's developmental progress and identifying concerns that may require professional assessment. However, parents of under-five children in Nigeria may have limited knowledge of age-appropriate developmental milestones and may not recognize early signs of developmental delay. Limited awareness, cultural expectations, comparison with other children, misconceptions about child development, stigma, and limited access to developmental screening services may contribute to delayed identification and intervention. Developmental milestone education provides an opportunity to improve parents' understanding of expected developmental achievements and early warning signs requiring professional assessment. Against this background, this study investigates the impact of developmental milestone education on recognition of developmental delays among parents of under-five children in Nigeria. The study will be anchored on the Health Belief Model, Health Literacy Framework, and Social Ecological Model. The Health Belief Model explains how parents' perceptions of the seriousness of developmental problems, perceived benefits of early recognition, perceived barriers, self-efficacy, and cues to action may influence their ability to recognize developmental concerns and seek appropriate assessment. The Health Literacy Framework emphasizes parents' ability to access, understand, evaluate, and apply information concerning child development and developmental screening. The Social Ecological Model emphasizes the influence of individual, family, community, healthcare, educational, cultural, and socioeconomic factors on recognition and response to developmental delays. Collectively, these theoretical perspectives provide a suitable framework for explaining how developmental milestone education may influence recognition of developmental delays among parents of under-five children in Nigeria. The study will adopt a quantitative quasi-experimental or analytical cross-sectional research design. The study population will comprise parents or primary caregivers aged 18 years and above who have children below five years of age and reside in selected urban and rural communities across Nigeria. A multistage sampling technique will be used to select geopolitical zones, states, local government areas, communities, households, healthcare facilities, and eligible parents. Developmental milestone education will be assessed using indicators such as exposure to educational sessions, frequency and duration of education, information on gross motor development, fine motor development, language and communication, social and emotional development, cognitive skills, adaptive or self-help skills, age-appropriate developmental expectations, developmental warning signs, developmental screening, early intervention, available child-development services, and appropriate healthcare-seeking. Recognition of developmental delays will be assessed using indicators such as parents' ability to identify missed or delayed milestones, recognize age-inappropriate developmental patterns, identify concerns across motor, language, cognitive, social, emotional, and adaptive domains, recognize regression or loss of previously acquired skills, distinguish normal developmental variation from potential delay, identify situations requiring professional assessment, and identify appropriate healthcare or developmental-support services. Data will be collected using structured questionnaires, standardized developmental milestone knowledge and recognition assessment tools, age-specific scenario-based questions, child health records where ethically accessible, and pre-test and post-test assessments where a quasi-experimental intervention is adopted. Descriptive statistics will be used to summarize parents' demographic and socioeconomic characteristics, children's age and developmental characteristics, previous exposure to child-development information, sources of information, and recognition patterns. Inferential statistical techniques, including chi-square tests, paired and independent t-tests, correlation analysis, and logistic or multiple regression analysis where appropriate, will be used to determine the impact of developmental milestone education on recognition of developmental delays. Where a quasi-experimental design is adopted, recognition scores before and after the educational intervention may be compared with those of a comparison group or community to determine changes associated with the intervention. Diagnostic tests will also be conducted to assess the reliability, validity, and robustness of the findings. The study is expected to find that developmental milestone education has a significant positive impact on recognition of developmental delays among parents of under-five children in Nigeria. Parents exposed to structured, practical, age-appropriate, culturally sensitive, and sustained developmental milestone education are expected to demonstrate greater ability to recognize possible developmental delays than parents without comparable education. Education may improve parents' understanding of expected milestones across motor, language, cognitive, social, emotional, and adaptive domains and help them identify signs that require professional assessment. Scenario-based education may improve parents' ability to distinguish normal variation from persistent developmental concerns and recognize developmental regression or significant delays. Education may also reduce the misconception that children will always "catch up" without assessment and encourage parents to discuss concerns with healthcare professionals. However, cultural beliefs, stigma surrounding developmental disabilities, financial barriers, limited access to developmental screening, shortage of trained professionals, geographical barriers, and misinformation may reduce the effectiveness of education alone. The study therefore expects accessible, practical, culturally appropriate, and sustained developmental milestone education, supported by functional screening and referral services, to contribute significantly to improved recognition of developmental delays among parents of under-five children in Nigeria. The study is expected to contribute to the literature on developmental milestones, developmental delay recognition, early childhood development, parental health education, child health, developmental screening, early intervention, health literacy, maternal and child health, and public health in Nigeria. The findings will provide useful information to the Federal Ministry of Health and Social Welfare, National Primary Health Care Development Agency, Federal Ministry of Education, state ministries of health and education, primary healthcare centres, hospitals, child-development services, paediatricians, nurses, community health workers, early-childhood professionals, parent organizations, development partners, and policymakers regarding strategies for improving early identification of developmental concerns. The study will also provide evidence-based recommendations for integrating developmental milestone education into child-health and immunization services, strengthening parental counselling, improving access to developmental screening and referral services, increasing community awareness of early childhood development, reducing stigma surrounding developmental concerns, and developing sustainable interventions that promote early recognition and timely support for developmental delays among children across Nigeria.

Keywords: Developmental milestone education, developmental delay recognition, parents, under-five children, child development, developmental screening, early intervention, parental health education, early childhood development, health literacy, Nigeria, public health.