What behavioral development accompanies the improvement in visual capacity and acuity in three-month-old infants?

The improvement in visual capacity and acuity in three-month-old infants is closely linked to the development of social smiling. As infants’ vision sharpens, they become more adept at recognizing faces and interacting with their caregivers. Social smiling emerges as a response to seeing familiar people, which serves as an important tool for building social connections and relationships. This behavior signifies an infant's growing engagement with their environment and the people in it, as they begin to respond with smiles to the social stimuli around them.

Babbling, while also a crucial developmental milestone that occurs around this age, is primarily focused on vocalizations rather than visual cues. Personal referencing and jargoning, on the other hand, involve more advanced cognitive and communicative skills that typically develop later as language and social interaction skills evolve further. Social smiling, thus, represents a clear correlation between an infant's enhanced visual abilities and their emerging social behaviors during this early stage.