Which infant demonstrates habituation?

Habituation is a fundamental psychological concept referring to the decrease in response to a stimulus after repeated exposure. In this instance, Robin, who tunes out a car alarm and falls asleep, demonstrates habituation effectively. Over time, the consistent presence of the car alarm likely led Robin to become accustomed to the sound, which diminished her reaction to it to the point of falling asleep. This behavior indicates that she has adjusted to the stimulus, reflecting the principles of habituation.

In contrast, Pedro's focus on the red circle suggests selective attention rather than habituation; he is actively engaged with one stimulus while ignoring others. Harry's persistent crying for a bottle indicates a heightened response to hunger rather than a decrease in response, which is not consistent with habituation. Neely's smiling at her brother's face shows recognition or preference, highlighting an emotional attachment instead of a decreased response to a frequently encountered stimulus. Thus, Robin's behavior exemplifies the process of habituation accurately.