| A | B |
|---|
| Sensorimotor Period Stage 1 | *use reflexes *move only in random motions |
| Sensorimotor Period Stage 2 | *combine reflexes *develop hand-mouth coordination *notice the surroundings |
| Sensorimotor Period Stage 3 | *discover cause and effect *work to produce results improve eye-hand coordination |
| Sensorimotor Period Stage 4 | *solve simple problems 8undrestand ideas of permanence *find partially hidden objects *imitate others |
| Sensorimotor Period Stage 5 | *find hidden objects *explore and experiment *understand object permanence |
| Sensorimotor Period Stage 6 | *think symbolically *think imaginatively *solve problems by thinking |
| Preoperational Period | *think of things only in terms of own activities *interpret language literally *understand simple abstract terms *develop vocabulary from 200 to 2000 words *solve problems by pretending or imitating |
| Concrete Operational Period | *learn best through direct experiencews *understand that operations can be reversed *classify objects into categories *understand conservation- that a certain amount of material can take different forms and shapes |
| Formal Operations Period | *think abstractly *solve problems by logical thinking *form ideals *understand double meanings |
