An important point about these data, however, is that the anticipatory response (vocalizations) continues throughout the play encounter.
The periaqueductal grey in the midbrain would be another place where stimulation appears to produce vocalizations in monkeys and humans.
Wood notes that in addition to crying, infant signaling modalities include other vocalizations such as fussing and facial expressions.
Second, intention attribution is crucial in learning to talk because, without sympathetic others, infant vocalizations make little sense.
Parents have no trouble extracting their infant's first words from the abundant primate vocalizations that they have been listening to since the baby's birth.
Furthermore, we would stress that these affective interactions involved not only vocalizations but also gestures, body movements, facial expressions, and so forth.
The vocalizations are a by-product of the pups' physiological response to cold stress that involves non-shivering thermogenesis in brown adipose tissue.
He suggests that manual gestures were integrated into spoken language after vocalizations were brought under voluntary control.
In newborn and very young infants, occurrence and quality of vocalizations are closely associated with arousal state.
Early vocalizations are largely expressive, manual control develops more rapidly than intentional vocal articulation, and vocal and manual activity are linked.
Implicitly, then, the theory suggests that falls stabilize at the time of the child's earliest speech-like vocalizations.
We further explore whether pause time is a valid indicator of relatedness by examining child vocalizations and utterances within their full interactional context.
The prosodic features of these vocalizations have been rated subjectively.
Thus, in order to examine pitch patterns in infant vocalizations more adequately, one needs also to investigate the role of rhythm and variations in timing.
Our results indicate that solitary activities with objects are often accompanied by an acoustically distinct set of vocalizations in infants around one year of age.
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