| A | B |
|---|
| mental combinations | trying out actions mentally |
| affordances | opportunities for interaction that an object offers |
| object permanence | the realization that something that is out of sight continues to exist |
| Noam Chomsky | theorist who believed that language ability is innate |
| B.F. Skinner | theorist who believed that verbal behavior is conditioned |
| Sensorimotor intelligence | thinking through the senses and motor skills |
| babbling | repetitive utterance of certain syllables |
| holophrase | a single word used to express a complete thought |
| overextension | overgeneralization of a word to inappropriate objects, etc. |
| deferred imitation | the ability to witness, remember, and later copy a behavior |
| dynamic perception | perception that focuses on movement and change |
| goal-directed behavior | purposeful actions |
| visual cliff | a device for studying depth perception |
| infantile amnesia | the inability to access memories from the first years of life |
| baby talk | also called "Motherese" |
| assimilation | incorporating new information into an existing schema |
| little scientist | Piaget's term for the stage-five toddler |
| launching event | research procedure for investigating cause-and-effect relations |
| underextension | a word used more narrowly than its true meaning allows |
| accommodation | modifying an existing schema to reflect new information |
| LAD | a hypothetical device that facilitates language development |
