When the mother puts the nipple into the mouth of 3-week-old Kierra, she starts sucking. This is an example of which sensorimotor substage?
A) secondary circular reactions
B) simple reflexes
C) coordination of secondary circular reactions
D) first habits and primary circular reaction

Question

Quizplus · Accepted Answer

The simple reflexes substage, which occurs from birth to approximately 1 month of age, involves innate reflexes such as sucking. When Kierra starts sucking as the nipple is put into her mouth, it demonstrates this reflexive behavior, characteristic of the simple reflexes substage of sensorimotor development.

When the Mother Puts the Nipple into the Mouth of 3-Week-Old