What is the name of the experimental task in which an infant interacts with an adult who first engages in normal social interaction and then suddenly becomes unresponsive?

A) still-face interaction paradigm
B) violation-of-expectation task
C) information processing approach
D) A-not-B error

The experimental task in which an infant interacts with an adult who first engages in normal social interaction and then suddenly becomes unresponsive is called the still-face interaction paradigm. Option B (violation-of-expectation task) is an experimental task where infants are shown a possible event and an impossible event to see whether they display surprise or novelty response. Option C (information processing approach) refers to an approach that seeks to understand how cognitive development occurs through examining how children physically, mentally, and emotionally process and respond to information in their environments. Option D (A-not-B error) is an error made by infants when they continue to search for an object in a location where they previously found it (location A), even after seeing it being hidden in a different location (location B).