| A | B |
|---|
| visual cliff | apparatus used in depth perception studies |
| secondary circular reaction | action-response-action sequence involving objects in the environment |
| object permanence | knowledge that objects exist even when hidden from view |
| sensorimotor | cognitive development characterized by coordinating sensations and actions |
| primary circular reaction | action-response-action sequence involving only the infant's own body |
| scanning | eye movement patterns of babies when fixating on objects |
| tertiary circular reactions | experimentation with different ways to acheive results |
| perseveration error | retention of first image even after object is moved in full view to another concealed location |
| decentration | play trend in which others become recipients of the child's actions |
| object transformation | act during play of child's pretending one thing is another |
| re-alert | response of baby that indicates renewed interest |
