Study sheet: Lifespan Physical and Cognitive Development

📋 Course Outline

1. Lifespan Development Framework
2. Age and Developmental Timing
3. Developmental Dimensions and Adaptation
4. Prenatal and Infant Physical Development
5. Growth, Puberty, and Physical Maturation
6. Aging, Senescence, and Compensation
7. Physical Well-Being and Genetics
8. Memory Systems and Development
9. Memory Strategies and Expertise
10. Forgetting and Memory Aging
11. Death and Biological Limits

📖 1. Lifespan Development Framework

🔑 Key Concepts & Definitions

• Lifespan development : The scientific study of how behavior and mental processes grow, change, or remain stable across the lifetime, highlighting the need for adaptation at every age.
• Adaptation : The process by which an individual adjusts to meet changing demands from biology, the environment, or life circumstances effectively.

★ Must-know

• Development is multidimensional because physical, cognitive, and socioemotional changes occur simultaneously.

Further detail

• Development is multidirectional because some behaviors and mental processes can expand while others shrink or remain stable at the same life stage.

• Development is contextual because individuals are influenced by environments, cultural settings, socioeconomic status, and unique life events.

💡 Memory Hook

P-C-S: physical, cognitive, socioemotional

📖 2. Age and Developmental Timing

📝 Essential Points

📌 Chronological age is the amount of time a person has been alive, whereas biological age indicates physiological cellular and tissue functioning and can be younger or older than chronological age.

📌 Developmental age indicates a person's developmental position compared with same-age peers, while social age reflects cultural expectations for people in different age groups.

• The lifespan stages are:
  • prenatal from conception to birth
  • infancy up to 2 years
  • early childhood from 2 to 6 years
  • middle childhood from 7 to 12 years
  • adolescence from 13 to 17 years
  • early adulthood from 18 to 39 years
  • middle adulthood from 40 to 64 years
  • late adulthood from 65 years onward

💡 Memory Hook

Chronological age counts years, whereas biological, developmental, and social ages describe functioning, development, and cultural expectations.

📖 3. Developmental Dimensions and Adaptation

🔑 Key Concepts & Definitions

• Cognition : The broad set of mental processes used to acquire knowledge, understand the world, and solve problems effectively.
• Physical development : Changes in biology and health, including brain development, motor skills, and sexuality.
• Cognitive development : Changes in thought processes such as reasoning, memory, and language.
• Socioemotional development : Changes in social interactions and emotions, including relationships, identity, and personality.

📝 Essential Points

• Understanding development helps a SET identify atypical needs, make age-appropriate expectations, set realistic goals, inform interventions, and promote empathy.

💡 Memory Hook

Changing biology, environments, and life circumstances → adaptation and changing developmental needs.

📖 4. Prenatal and Infant Physical Development

🔑 Key Concepts & Definitions

• Reflex : An automatic motor response, and newborn reflexes are assessed because absent or weak reflexes can indicate an underlying problem with brain or nervous-system development.

★ Must-know

• The most rapid physical changes of the lifespan occur from conception to birth, when a zygote develops into a fully formed infant in approximately 40 weeks.

📌 Infants born before 37 weeks are classified as preterm and face higher risks of illness and death because their bodies and organs are not fully developed.

• The pincer grasp, in which the thumb and index finger meet, generally develops around 9 to 12 months and allows infants to pick up small objects.

Further detail

• Prenatal development of sensory organs permits early experiences of touch, hearing, and taste before birth.

• Important newborn reflexes include:

  • the grasping reflex
  • the rooting reflex
  • the sucking reflex

💡 Memory Hook

Womb senses → reflexes → gross motor control → fine motor control

📖 5. Growth, Puberty, and Physical Maturation

★ Must-know

• The adolescent growth spurt begins around age 10 for girls and 12 for boys and increases height, muscle fibers, and strength, particularly in boys.

• Puberty typically begins between ages 9 and 13 and is marked by the attainment of sexual maturity.

• Young adulthood generally brings the peak of physical development because body systems reach maximum efficiency, strength, and biological potential.

Further detail

• Overall rates of growth and physical change slow during early life.

💡 Memory Hook

Growth slows → adolescent spurt → puberty → young-adult physical peak

📖 6. Aging, Senescence, and Compensation

🔑 Key Concepts & Definitions

• Senescence : The physical decline that naturally occurs with age and is asynchronous because body systems do not age at the same speed or in the same way.

📝 Essential Points

📌 Primary aging consists of inevitable universal changes caused by normal aging, whereas secondary aging consists of changes related to illness or health habits and is not inevitable.

• When physical limitations interfere with tasks, a client can adapt by modifying actions through compensation strategies or by using adaptive equipment.

💡 Memory Hook

Primary aging is inevitable, whereas secondary aging depends on illness and health habits.

📖 7. Physical Well-Being and Genetics

★ Must-know

📌 Genotype is the inherited set of genes, whereas phenotype is the set of observable traits produced by interactions between genes and environmental influences such as nutrition, exercise, accidents, and illnesses.

• Physical well-being contributes significantly to overall well-being, although clients have little or no control over many physical characteristics.

Further detail

• Epigenetics concerns environmental influences that can turn gene expression on or off without changing the inherited genes themselves.

💡 Memory Hook

Genotype is inherited, whereas phenotype reflects both genes and environment.

📖 8. Memory Systems and Development

🔑 Key Concepts & Definitions

• Memory : The ability to store information or representations of past experience through encoding, retention across an interval of time, and retrieval or reactivation.

★ Must-know

• The memory system includes:

  • sensory memory
  • short-term memory
  • episodic memory
  • long-term memory

• Brain development, including development of the prefrontal cortex and hippocampus, supports the increasing ability to manage complex short-term and long-term memory demands during childhood and adolescence.

Further detail

• Infants take in information through their senses before birth and during infancy, and this sensory learning supports the use of memory.

💡 Memory Hook

Encoding → retention → retrieval

📖 9. Memory Strategies and Expertise

★ Must-know

• Before age 5, children generally do not generate memory strategies spontaneously, whereas older children are more likely to generate and use mnemonic techniques.

• Memory strategies include:

  • organization into categories
  • elaboration through images
  • elaboration through storytelling
  • combining words into meaningful associations

• Rehearsal helps information re-enter short-term memory, increasing the likelihood that it will enter long-term memory.

• Accumulated experience and expertise help older children and adolescents organize and store new information more efficiently by using prior knowledge.

Further detail

• Significant memory improvements occur during infancy, with research using the mobile task at 2 to 5 months and the train task at 6 months.

💡 Memory Hook

Rehearsal → organization → elaboration

📖 10. Forgetting and Memory Aging

★ Must-know

• Forgetting at any age is normal and biologically necessary for efficient cognitive functioning.

• Adults generally experience only minor age-related memory declines that do not interfere with daily life.

📌 Severe memory loss is associated with neurodegenerative disorders and other medical conditions rather than being a normal consequence of aging.

Further detail

• Factors affecting memory include:
  • reduced neural connections
  • declining attention
  • stress
  • depression
  • physical activity
  • nutrition
  • cognitive activities

💡 Memory Hook

Reduced neural connections and attention, stress, depression, and poor health → greater forgetting.

📖 11. Death and Biological Limits

📝 Essential Points

• Death is rarely a singular sudden event when viewed biologically because aging involves a developmental trajectory increasingly characterized by loss and decline.

• Death marks the ultimate biological limit when the body's physical infrastructure can no longer sustain life.

💡 Memory Hook

Progressive biological decline → failure of physical systems to sustain life.

📊 Synthesis Tables

Age Concepts Compared

Concept	What it measures	Can it differ from chronological age?
Chronological age	Time lived	No; it is fixed
Biological age	Cellular and tissue functioning	Yes
Developmental age	Development relative to same-age peers	Yes
Social age	Cultural expectations for an age group	Yes

Types of Aging Compared

Type	Cause	Inevitable?
Primary aging	Normal aging processes	Yes
Secondary aging	Illness or health habits	No