Physical Development Across the Human Lifespan

• Begins in the womb through prenatal development which includes three stages: the germinal, embryonic and fetal stage
• Newborn development mainly involves physical growth and motor skill improvement
• During infancy (0-3 years), significant milestones include rolling over, sitting up, crawling, and toward the end, walking
• Throughout childhood (4-11 years), development of fine motor skills (e.g. tying shoelaces) and gross motor skills (e.g. riding a bike) takes place
• Adolescence (12-18 years) involves the onset of puberty resulting in growth spurts, development of secondary sexual characteristics and menstruation in females
• Adulthood is categorised into early (19-45 years), middle (46-65 years) and later (65+ years) stages, featuring continued physical development, stability then decline in physical capabilities, respectively

Intellectual Development Across the Human Lifespan

• Neonates start learning through their senses
• In infancy, language development and problem-solving abilities begin
• Childhood is a critical stage for cognitive development, encompassing memory formation, attention span increase and development of logical thinking
• Adolescence comes with an increase in abstract thinking, decision-making skills, and the ability to reason through complex problems
• Early and middle adulthood involve continued learning, while late adulthood may involve intellectual decline due to ageing processes, although this varies significantly among individuals

Emotional Development Across the Human Lifespan

• Newborns primarily show emotional responses such as crying for discomfort or quietness for comfort
• In infancy, emotions such as joy, fear and anger appear, with emotional attachments to caregivers forming
• Throughout childhood, individuals begin to understand and express a wider range of more complex emotions
• Adolescence often involves an emotional rollercoaster due to hormonal fluctuations accompanied with an increased focus on peer relationships and self-identity
• Emotional development continues in adulthood, incorporating the ability to handle more complex emotional situations and experiences

Social Development Across the Human Lifespan

• An infant's social world revolves around their relationship with caregivers
• Childhood is a crucial time for developing relationships with peers, understanding social norms, and learning social roles
• Adolescents often increasingly focus on social relationships outside the family, particularly with their peers and they begin exploring romantic relationships
• Adults often form long-term romantic partnerships, and their social circle may expand to include professional relationships
• Late adulthood often involves retirement, which may change several aspects of their social dynamics

Remember to look at these developments in a holistic manner rather than in isolation, as development in one area often impacts another. Remember, everyone develops at their own pace and experiences can greatly influence development.