Summary
Highlights
The video introduces a six-part comprehensive review for the 2023 board examination, starting with Part One. It acknowledges Ma'am Darily Lukob for developing the PowerPoint presentation. The discussion will cover perspectives on nature and nurture, research methods and ethical considerations, developmental theories, developmental principles, developmental issues and tasks, and developmental challenges and milestones. The review aims to prepare students for both the board and final examinations, utilizing reference books from Papalia and Santrock.
The video begins by defining development as a lifelong process involving changes and stability, following evolutionary blueprints. Human development is a scientific study of systematic processes of change and stability, with researchers now focusing on lifespan development (conception to death). Development is viewed as lifelong, multidimensional, multidirectional, plastic, multidisciplinary, and contextual, involving growth, maintenance, and regulation of loss. The four goals of human development are described as: description (e.g., when children say their first word), explanation (why some speak later), prediction (likelihood of speech problems), and intervention (e.g., child's speech therapy).
Three main developmental issues are discussed due to the complexity of human development. The first is nature versus nurture, debating whether development is primarily influenced by biological makeup (nature) or environmental aspects (nurture). The second is stability versus change, questioning if individuals remain consistent in personality and perspective over time or change due to environmental influences. The third is continuity versus discontinuity, exploring whether development involves gradual, cumulative changes (continuity, where stages influence each other) or distinct, separate stages of development (discontinuity).
Human development is studied across three overlapping domains: physical, cognitive, and psychosocial. Physical development includes body and brain growth, sensory capacities, motor skills, and health. Cognitive development involves changes in mental abilities like learning, attention, memory, language, thinking, reasoning, and creativity. Psychosocial development focuses on changes in emotions, personality, and social relationships. Influences on development are categorized into heredity (internal, biological processes) and environment (external influences from conception throughout life), with maturation being the natural unfolding of physical and behavioral patterns. The video emphasizes that nature and nurture work together, not against each other, as illustrated by the callus example. It also introduces nativist (innate capacities) and empiricist (learning from experience) perspectives.
Human development is deeply influenced by social and cultural contexts, with family as the primary unit. Two main family types are nuclear (two-generational kinship) and extended (multigenerational kinship). Socioeconomic status (income, education, occupation) significantly impacts quality of life, nutrition, medical care, and schooling. Culture, as a society's total way of life (customs, traditions, beliefs), is constantly changing, influenced by global interactions and the tension between individualistic and collectivistic cultures. The concept of ethnic gloss is introduced, highlighting the oversimplification of ethnic groups. Gender and historical context (historical generation and cohorts) also play crucial roles. Normative (age-graded like puberty or school entry; history-graded like COVID-19) and non-normative influences (unusual individual events like domestic violence or child labor) are also discussed, with cognitive exercises provided.
The timing of influences includes imprinting, an instinctive learning during a critical period (e.g., baby animals forming attachment to the first moving object they see), sensitive periods (times when individuals are more open to certain experiences, like language learning in early childhood), and brain plasticity (the brain's ability to adapt and learn). The video then delves into mechanisms of heredity, using the example of sex determination, scientifically explaining that the father's sperm (carrying either X or Y chromosome) determines the baby's sex, not the mother. It emphasizes that mothers should not be blamed for a child's sex.
The video explains how traits are passed from parents to children through genes, which come in dominant or recessive alleles. Dominant inheritance occurs when a dominant allele is expressed, overpowering a recessive one (e.g., brown eyes from a dominant B allele). Recessive inheritance occurs when two identical recessive alleles are present, leading to the expression of the recessive trait (e.g., blue eyes from two recessive b alleles). Phenotype refers to observable characteristics (e.g., eye color), while genotype refers to a person's underlying genetic makeup, including both expressed and unexpressed genes.
The interaction between heredity and environment is further explored with two key concepts: reaction range, which states that genes provide a potential range for development, but environmental conditions determine where within that range a person falls (e.g., height potential versus actual height due to nutrition); and canalization, where some traits (highly canalized like walking and talking) develop consistently regardless of environmental differences, while others (like cognition and personality) are more environmentally influenced. Genotype-environment interaction describes how genetically different individuals respond differently to the same environment. Genotype-environment correlation refers to how genetic tendencies reinforce environmental influences; this occurs in three forms: passive (parents provide both genes and supportive environment), evocative (inherited characteristics elicit responses from others), and active or niche-picking (individuals seek environments matching their genetic tendencies).
The concept of non-shared environment explains why siblings can be so different despite growing up in the same family. Unique experiences, differential treatment from parents and siblings, and unique life events (e.g., illness, accidents, friendships) contribute to individual differences. Birth order is also presented as a relevant non-shared environmental influence. Finally, the video lists characteristics strongly influenced by heredity: obesity (40-70% genetic risk), intelligence (strong genetic influence, especially from the mother, and brain structure), temperament (inborn personality traits), schizophrenia (60-80% heritable), and religiosity (moderately heritable).