Study Guide: Social, Personality, Physical, and Cognitive Development in Childhood (Psychology)

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Chapter 6 – Social and Personality Development in Infancy

Emotional Development in Infancy

Infants experience a range of emotions that are expressed through physiological, behavioral, and cognitive changes. These emotions play a crucial role in early social interactions and attachment formation.

Emotions: Subjective responses linked with physiological, behavioral, and cognitive changes.
Infant Emotions: Interest, disgust (at birth); later anger, surprise, sadness, fear (4–6 months).
Smiles: Reflexive Smile (during sleep); Social Smile (response to human faces around 18 weeks).
Anxiety: Stranger Anxiety (6–8 months); Separation Anxiety (7–14 months), peaking by age 2.
Attachment: Bowlby’s theory – Bonding is essential for survival; Harlow’s comfort studies; Ainsworth’s Strange Situation.
Attachment Styles: Secure, Avoidant, Ambivalent; RAD = disordered attachment.
Erikson’s Stage (Infancy): Trust vs. Mistrust – Autonomy vs. Shame & Doubt.

Example: A securely attached infant seeks comfort from a caregiver when distressed and is easily soothed.

Chapter 7 – Physical and Cognitive Development in the Preschool Years

Growth and Motor Skills

Preschool children experience rapid physical growth and development of motor skills, which are essential for independence and learning.

Growth: 2–3 inches and 4–6 lbs/year.
Gross Motor Skills: Jumping, skipping.
Fine Motor Skills: Drawing, dressing, hand/eye coordination.

Cognitive Development

Piaget’s Preoperational Stage (2–7 yrs): Symbolic thought, but egocentric and lack conservation.
Vygotsky’s Theory: Learning via social interaction; Zone of Proximal Development (ZPD), scaffolding.
Language: Rapid growth; ~14,000 words by age 6; word/2 hours.
Screen Time: 2.5 hrs/day; Sesame Street improves later academic skills.

Example: Preschoolers may struggle to understand that the amount of liquid remains the same when poured into a differently shaped container (lack of conservation).

Chapter 9 – Physical and Cognitive Development in Middle Childhood

Physical Growth and Health

Middle childhood is marked by steady physical growth and increasing independence in health and self-care.

Growth: 5–7 lbs, 2–3 inches/year; need ~2,400 calories/day.
Obesity: BMI >95th percentile; causes: genetics, poor diet, inactivity.
Health Issues: Asthma (U.S. 8.5%), accidents, visual/auditory impairment.

Cognitive and Intelligence Development

Motor Skills: Strength, coordination, organized sports; rough-and-tumble play.
ADHD: Inattention, hyperactivity, impulsivity; learning disorders: dyslexia, dyscalculia, dysgraphia.
Intelligence: Fluid (reasoning) vs. Crystallized (knowledge).

Example: Children with ADHD may have difficulty focusing on tasks and may be easily distracted in classroom settings.

Chapter 10 – Social and Personality Development in Middle Childhood

Self-Understanding and Morality

Children in middle childhood develop a more complex sense of self and begin to understand moral concepts and social comparison.

Self-Understanding: Physical → psychological traits; social comparison.
Kohlberg’s Morality:
- Preconventional (punishment/reward)
- Conventional (social rules)
- Postconventional (personal ethics)
Gilligan’s Theory: Boys – justice; Girls – care/compassion.
Popularity: Humor, helpfulness, empathy, social skill.
Bullying: Verbal, physical, relational, cyber.
Family: Multigenerational (20%), blended (16%), role ambiguity.
Attribution: Cultural/gender differences in success/failure.

Example: Children may compare themselves to peers in academic or athletic performance, influencing self-esteem.

Key Terms and Concepts Table

The following table summarizes key terms and their definitions or examples from the study guide:

Term	Definition/Example
Attachment	Emotional bond between infant and caregiver; measured by Ainsworth's Strange Situation.
Secure Attachment	Child seeks comfort, is easily soothed by caregiver.
Ambivalent Attachment	Child is clingy, angry when separated.
Avoidant Attachment	Child avoids caregiver, shows little emotion.
Zone of Proximal Development (ZPD)	Vygotsky's concept: gap between what a child can do alone and with guidance.
Scaffolding	Adult guidance to support learning within ZPD.
Fluid Intelligence	Reasoning and problem-solving ability.
Crystallized Intelligence	Knowledge accumulated over time.
ADHD	Attention-deficit/hyperactivity disorder; symptoms include inattention, impulsivity.
Dyslexia	Reading disorder.
Dyscalculia	Math disorder.
Dysgraphia	Writing disorder.
Obesity	BMI >95th percentile for age and sex.
Egocentrism	Inability to see others' viewpoints (Piaget).
Conservation	Understanding that quantity remains the same despite changes in shape or appearance.

Additional info:

These notes are based on psychology study materials, not general biology. However, they are relevant for introductory psychology or child development courses.
Erikson’s stages, Piaget’s theory, and Vygotsky’s ZPD are foundational concepts in developmental psychology.
Physical growth rates and health issues (e.g., obesity, asthma) are included as part of developmental milestones.