12 weeks-smiles when talked to and nods and cooing. Show 16 weeks- turns head searching for the speaker,chuckles. 20 weeks- vocalization differs. 6 months- cooing changes to babbling, utterances such as ma,mu,da,di. 8 months- utterances can signal emotions,repetition in babbling. 10 months- making an effort to imitate adult sounds, gurgling, bubble blowing. 12 months- words, many words an requests under stood. 18 months- 3-50 words,, explosive vocabulary growth, understands nearly everything spoken, babbling has more intonation. 24 months- Vocabulary more than 50 words, spontaneous creation of two word sentences, and clear efforts to communicate. What is primary circular reaction quizlet?- Primary circular reactions are the infants repeating of interesting or enjoyable actions on his or her own body, sucking on the thumb or finding the feet.
What is secondary circular reaction?Secondary circular reactions.
This substage is characterized by repeated actions involving objects that cause the baby pleasure. An example of this would be when a baby continuously shakes a rattle just to hear the sound of the rattle.
How do secondary and tertiary circular reactions differ?Tertiary Circular Reactions
These differ from secondary circular reactions in that they are intentional adaptations to specific situations. The infant who once explored an object by taking it apart now tries to put it back together.
What are secondary circular reactions according to Piaget?in Piagetian theory, a repetitive action emerging around 4 to 5 months of age that signifies the infant's aim of making things happen.
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What is the difference between the primary and secondary circular reaction sub stages quizlet?
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