"What infant-perception research technique involves giving an infant a choice of what object to look at and then looking for a reliable preference for one stimulus over the other?"

preferential looking

Explanation: Preferential looking refers to a concept of developmental psychology used to access and evaluate perceptions or thought of a child without verbal utterances. Preferential looking is used to gain insight on what or how a child perceives different events or objects by offering such child different choices and evaluating how the baby's eye fixation varies for the different objects or stimulus to gain insight on the preference or distinction in perception of the objects or stimulus.

barack obama

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answer; standardization;