When baby Radsheda reaches for her pacifier, she accidentally pushes it under her pillow. Rather than searching for the pacifier under the pillow, Radsheda cries. One possibility why Radsheda does not search for the pacifier under the pillow is because she has not yet developed

object permanence.

Explanation:

Object permanence is used to describe the situation were infants knows that an object continues to exist even when they are not seeing it.

Baby Radsheda is yet to develop her object permanence, that was why she opted for crying rather than looking for her pacifier.

A child that have developed her object permanence will search for any object she is playing with once it goes missing, this is because she believes the object exists.