Abby has begun to suck only her thumb, rather than her whole hand. it is likely that Abby is in stage <u>two</u> of sensorimotor development.
Abby has started to suck her thumb instead of her entire hand. Abby is probably in the stage two of sensorimotor development. In addition to simple reflexes, primary circle reactions, secondary circular reactions, coordination of reactions, tertiary circular reactions, and early symbolic reasoning, the sensorimotor stage of development can be divided into six more substages.
The six more substages of the sensorimotor stage of development are simple reflexes, primary circular reactions, secondary circular reactions, coordination of reactions, tertiary circular reactions, and early symbolic reasoning. Six further substages that make up the sensorimotor development of development.
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