A time when certain internal and external influences have a major effect on development; at other periods, the same influences will have little or no effect
The tendency to cling viperously to an adults finger or any to any object placed in their hands
Very young babies take what looks like walking steps if they are held upright with there feet just touching a flat surface
The average ages at which skills are achieved such as movement, grasping, crawling and walking
Piaget's Sensory Motor Stage
Birth to 2 years; main activities involve sucking and grasping; must achieve object permanence and mental representations
Piaget's Preoperational Stage
representing things with words and images; use intuitive rather than logical reasoning
Piaget's Formal-operational Stage
Can now think logically and about hypothetical statements, can judge consequences, increases with age.
The tendency in certain species to follow the first moving thing (usually its mother) it sees after it is born or hatched
Two children playing side by side at similar activities but playing little or no attention to each other; the earliest kind of social interaction between toddlers
A little girl's knowledge hat she is a girl, and a little boy's knowledge that he is a bay
Elkind's term for adolescent's delusion that they are constantly being observed by others.
Elkind's term for adolescent's delusion that they are unique, very important, and invulnerable.
Erickson's term for the development of a stable sense of self necessary to make the transition from dependence on others to dependence on oneself
A period of intense self-examination and decision making; part of the process of identity formation
A time when adults discover they no longer feel fulfilled in their jobs or personal lives and attempt to make a decisive shift in their career or lifestyle.
According to levinson, a process whereby adults assess the past and formulate new goals for the future
A neurological disorder, most commonly found in late adulthood, characterized by progressive losses in memory and cognitive and changes in personality.