chapter 4 (part 2)

	in Piaget's theory, the stage of cognitive development (normally beginning at age 12) during which people begin to think logically about abstract concepts
	the fear of strangers that infants commonly display, beginning by about 8 months of age
	an emotional tie with another person; shown in young kids by their seeking closeness to the caregiver and showing distress on separation
	an optimal period shortly after birth when an organism's exposure to certain stimuli or experiences produces proper development
	the process by which certain animals form attachments during a critical period very early in life
	according to Erik Erikson, a sense that world is predictable and trustworthy; said to be formed during infancy by appropriate experiences with responsive caregivers
	a sense of one's identity and personal worth
	the transition period from childhood to adulthood, extending from puberty to independence
	the period of sexual maturation, during which a person becomes capable of reproducing
	the body structures (ovaries, testes, and external genitalia) that makes sexual reproduction possible
	non-reproductive sexual characteristics, such as female breasts and hips, male voice quality, and body hair
	the first menstrual period
	one's sense of self; according to Erikson, the adolescent's task is to solidify a sense of self by testing and integrating various roles
	in Erikson's theory, the ability to form close, loving relationships; a primary developmental task in late adolescence and early adulthood
	the time of natural cessation of menstruation; also refers to the biological changes a woman experiences as her ability to reproduce declines
	a progressive and irreversible brain disorder characterized by gradual deterioration of memory, reasoning, language, and, finally, physical funtioning
	a study in which people of different ages are compared with one another
	research in which the same people are restudied and retested over a long period
	one's accumulated knowledge and verbal skills; tends to increase with age
	one's ability to reason speedily, and abstractly; tends to decrease during late adulthood
	the culturally preferred timing of social events such as marriage, parenthood, and retirement