Infant Reflex Persistence and Development
A study on infant reflexes provides the following data: the rooting reflex, present in 100% of newborns, declines to 5% by four months; the palmar grasp, present in 98% of newborns, declines to 2% by six months; and the Moro reflex, present in 99% of newborns, persists in 15% of infants at six months. Based on typical developmental milestones, which finding at 12 months of age would be of greatest concern to a developmental psychologist?
A
Loss of the palmar grasp
B
Disappearance of the rooting reflex
C
Variation in reflex strength
D
Persistence of the Moro reflex
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