Developmental Stages and Characteristics
Infancy (0-12 months)
- Physical growth is rapid with birth weight doubling by 6 months and tripling by 12 months.
- Motor development progresses from head to toe (cephalocaudal) and center to periphery (proximodistal).
- Key milestones include social smile (2 months), sitting without support (6 months), and walking (12 months).
Clinical Application
A 6-month-old infant should be able to sit with support and transfer objects between hands. Failure to meet these milestones may indicate developmental delays requiring assessment.
Toddlerhood (1-3 years)
- Autonomy development is primary focus with increased independence in mobility and self-care activities.
- Language explosion occurs with vocabulary increasing from 10 words at 18 months to 1000 words by age 3.
- Parallel play is characteristic, where children play alongside but not directly with other children.
Safety Alert: Toddlers have increased mobility but limited judgment, making them high-risk for accidents and poisoning.
Preschool (3-5 years)
- Initiative vs guilt stage where children develop confidence in their ability to lead and make decisions.
- Preoperational thinking according to Piaget, characterized by symbolic thinking but limited logical reasoning.
- Cooperative play emerges with increased social interaction and rule-following abilities.
School Age (6-12 years)
- Industry vs inferiority stage focusing on developing competence in academic and social skills.
- Concrete operational thinking develops with logical reasoning about concrete objects and situations.
- Peer relationships become increasingly important with team sports and group activities.
Adolescence (12-18 years)
- Identity vs role confusion is the primary developmental task with exploration of personal values and beliefs.
- Formal operational thinking emerges with abstract reasoning and hypothetical problem-solving abilities.
- Physical changes of puberty occur with significant hormonal fluctuations affecting mood and behavior.
Clinical Application
Adolescents may engage in risk-taking behaviors due to brain development patterns. The prefrontal cortex responsible for decision-making isn't fully mature until age 25.
Study Tips and Assessment
NCLEX Success Tips
- Remember age ranges for each developmental stage
- Focus on safety concerns for each age group
- Understand normal vs abnormal developmental patterns
- Know when to refer for developmental delays
Common Pitfall: Don't confuse chronological age with developmental age - children may develop at different rates while still being within normal limits.
Quick Check Questions
- ☐ Can you name Erikson's first four developmental stages?
- ☐ Do you know the difference between parallel and cooperative play?
- ☐ Can you identify red flags for developmental delays?
- ☐ Do you understand cephalocaudal and proximodistal development patterns?