1. Chapter 9
Lifespan Development

2. Sex and Biology

3. Female Reproductive Organs

4. Fertilization
Fertilization = sperm + ovum
(the gametes) form a single
new cell, a zygote.

5. The closer the genetic link between two individuals,
the more similar their IQ scores are.
Nature or nurture?

6. Prenatal Testing
Ultrasound Sonography

7. The Start of Life
The Onset of Development
Germinal Stage
(first 2 weeks)
Embryonic Stage
(two to eight weeks)
Fetal Stage
(eight weeks until birth)

8. The Competent Newborn
Reflexes
http://media.pearsoncmg.com/ph/hss/shared_hss_assets/psychology/dev_vid/video_pop-ups/feldman_vi

9. The Competent Newborn: Milestones
•Head up • One word
•Rolling over • Sentences
•Standing alone
•Crawling
•Cruising
•Walking

10. Psychosocial Development
In Childhood
• Harlows: Attachment
determined by contact
comfort, rather than food.
• (Attachment to an
inanimate object is not
sufficient for normal social
development.)
• [next]

11. Cognitive Development
In Childhood
• Jean Piaget proposed that cognitive development progresses
through a series of qualitative stages [next]

12. Cognitive Development
In Childhood
• Sensorimotor
• Preoperational (near end of second year – ~7): Operation
= mental action
– Symbolic functioning
– Centration; egocentrism [next]
• Concrete Operations
• Formal Operations
– Love, shades of gray, values

13. Adolescence
• Puberty
– Development of primary and secondary sex characteristics.
– “The adolescent growth spurt”
– Girls begin their growth spurts earlier (approx. 2 years) and complete them
earlier.
– By age 13, boys are taller on average.
• Androgens
• Estrogens
• Menarche
• Cultural trends
• Secular trends shows earlier maturation (next slide)

15. Young Adulthood
• Parenting
– Authoritarian
– Authoritative
– Permissive
– Negligent
– Democratic

16. Middle Adulthood
• Physical changes > characterized by a gradual decline.
• Visual and auditory sensitivity declines, muscle strength
decreases, and reaction time
• Hormonal changes > menopause; marks the end of
childbearing.
• Decrease in estrogen production can lead to osteoporosis.

17. Late Adulthood
• increase in susceptibility to
disease.
• Dementia: degenerative,
irreversable
• ~1/3 of 85+ may suffer from
Alzheimer's disease
• Erikson: integrity versus despair
– People who are unable to put their
life in perspective may experience
anger, bitterness, and despair.

18. Death, Dying, and Bereavement
• Elisabeth Kubler-Ross
– Denial
– Anger
– Bargaining
– Depression
– Acceptance