Theories of Development
What Theories Do
Developmental theory = is a systematic
statement of principles and
generalizations that provides a coherent
framework for studying development.
It connects facts and observations
It offers insight a
Critical Thinking Activity: Early Temperament Style and Later
Now that you have read and reviewed Chapter 7, take your learning a step
by testing your critical thinking skills on this scientific reasoning exercise.
A study by C
Introduction: Definitions change over time
The study of human development is the science that seeks to
how and why people change over time
how and why they remain the same over time
More Is a process of continual cha
The First 2 Years: Cognitive Development
Cognition refers to thinking, including language,
learning, memory, and intelligence.
Jean Piaget (born 1896) was a pioneer in studying
cognitive development in humans.
More recent research has both val
The First 2 Years: Psychosocial
What does Psychosocial mean?
Psychosocial development is the combination of emotional and
During infancy, interactions with sensitive, responsive caregivers
The New Genetics
What Genes Are
sequence of chemicals consisting of
The Play Years: Biosocial Development
Growth Patterns from Ages 26
Children become slimmer, more muscular,
and gain almost 3 and 4 lbs per year.
Lower body lengthens
Child becomes slimmer
Steady increase in height and weight
3 inches i
First Two Years: Biosocial
An average newborn is 7 lbs, 20 inches.
Infants triple their birth weight by 1 year.
By age two, they are about their adult height (!) and their adult
Percentile ranks: allow comp
Development and Birth
Zygote divides and keeps
dividing. At least through the
third doubling the cells are the
At this stage (8 cells) the first
differentiation takes place
At about a week after