A 4-month-old infant watches his aunt and uncle trying to get his attention during a FaceTime call. On one side of the screen, he sees his aunt waving at him, silently. On the other side of his screen, he sees his uncle clapping his hands. He hears the clapping sounds. Intermodal perception leads the baby to:

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Restating the scenario: A 4-month-old infant watches his aunt waving silently and his uncle clapping while he hears the clapping. Intermodal perception refers to the ability to integrate information from different sensory modalities, such as sight and hearing, to form a coherent percept.

Option under consideration: Look more at his uncle clapping his hands than at his aunt waving.

Analysis of the option:
- Why this aligns with intermodal perception: The infant is exposed to synchronized multisensory cues—the sound of clapping and the visual event of someone clapping. Infants at this age are known to match auditory events with corresponding visual events, and they tend to attend to the source of an auditory cue when there is a visual counterpart. Since the clapping sound is associated with the uncle’s hand movements, the infant is primed to look toward the side where he sees the clapping and hears the sound, reinforcing the integration of audio-visual information.
- Why this is plausible given developmental expectations: By 4 months, infants show preference for synchronized audiovisual stimuli and begin to link the sound with the person or action producing it. They are more likely to fixate on the person or action that corresponds to the heard sound rather than the unrelated visual cue (the waving aunt) which does not have an accompanying sound.

Considerations about the alternative (aunt waving):
- The aunt’s waving is a visual event without an audible cue in this moment. Because there is no matching sound to pair with the silent waving, an infant relying on intermodal perception would be less compelled to focus on the silent waving action compared to the actively heard clapping.
- This does not mean the aunt is ignored entirely, but relative attention is more strongly guided by the synchronized audio-visual pairing present with the uncle.

In summary, the infant’s intermodal perception leads to prioritizing the clapping event, which provides a congruent audiovisual cue (sight of clapping plus sound), over the silent waving gesture. The chosen option reflects this expected behavior and aligns with what is known about early multisensory integration in infancy.

PSC 140 001 SQ 2025 Exam 1 Foundations (Ch 1, 2, 3, and 5)

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