Deals with systematic, predictable changes in thinking and behavior over the lifespan
Involve comparing people of different ages at the same point in time
Tracks the behavior of a single cohort over a long period of time
People of different ages are followed over a long period of time.
Piaget's Theory of Cognitive Development
Describes how children's thinking changes as they get older
0-2 years. Children think only in terms of what they can sense and what they can do with what they sense
The understanding that objects continue to exist even when their presence can't be sensed.
2-6 years. Children at this age don't use logical reasoning, but instead use reason intuitively. Develop concept of object permanence.
Kids in the pre-operational stage have trouble seeing things from other's perspectives
Concrete Operational Stage
6-12 years. Children think logically, but only about things that they've had direct experience with or can easily imagine
12+ years. Children can think abstractly and apply logical rules to envision things they haven't seen.
In Piaget's theory, the "out-of-balance" state that occurs when a person realizes that his or her current ways of thinking are not working to solve a problem or understand a situation
An understanding of how some aspect of the world works
Understanding events in terms of your current scheme
Changing your understanding to more accurately reflect the way the world works
Erikson's Psycho-Social Development Theory
Tension or disequilibrium is necessary for change. People go through 8 stages in their lives that involve a different crisis with sources of tension.