Human development happens in different stages from when we are babies to becoming adults. Each stage has its own changes in body, social life, and thoughts. Knowing about these stages helps us understand how people grow and how complicated this process can be.

Infancy (0-2 years)

• Physical Changes: Babies grow quickly in height and weight. They learn to move, starting with simple reflexes and getting better at moving around.
• Social Changes: Babies start to bond with their caregivers, building important social connections.
• Psychological Changes: Babies begin to learn by using their senses and movements.

Early Childhood (2-6 years)

• Physical Changes: Kids still grow but not as fast as babies. They get better at moving their bodies and using their hands.
• Social Changes: Kids start to play alongside each other, leading to more complex play. They begin to understand how others feel.
• Psychological Changes: Children start to think symbolically, which helps with language and creative play. They begin to learn social rules.

Middle Childhood (6-12 years)

• Physical Changes: Kids continue to grow steadily, getting stronger and better at physical activities.
• Social Changes: Friends and peer relationships become very important. Kids develop social skills while playing team sports and making friends.
• Psychological Changes: Kids start to think logically about things they can see and touch. They may become more aware of themselves and can struggle with self-esteem.

Adolescence (12-18 years)

• Physical Changes: During puberty, teenagers go through quick physical changes and may feel a bit awkward.
• Social Changes: Teens focus on figuring out who they are, including their values and beliefs.
• Psychological Changes: Teens develop the ability to think more deeply and critically. They may experience ups and downs as they face new challenges.

Early Adulthood (18-40 years)

• Physical Changes: Many people reach their best physical health, but lifestyle choices start to impact their long-term health.
• Social Changes: Building close relationships and starting families become significant. Careers and education are important parts of life.
• Psychological Changes: People solidify their identities and goals in life. Making big decisions can bring stress or happiness, affecting their future.

Later Adulthood (40+ years)

• Physical Changes: Physical abilities decline slowly, and health problems may start to appear.
• Social Changes: The focus shifts to legacy and relationships with family and friends. Social circles may become smaller.
• Psychological Changes: People reflect on their lives, thinking about what they’ve accomplished versus what they wished to achieve. This can lead to feelings of happiness or regret.

Understanding these stages of human development helps Year 11 Psychology students see how people change and grow throughout life. This knowledge lays the groundwork for exploring more complex psychological ideas.