Anxiety, hostility, worry, depression, and self-consciousness are characteristics of which personality trait?

Rough-and-tumble play emerges in

A. infancy. B. preschool. C. toddlerhood. D. elementary school.

In a study by Eimas and colleagues (1971), young infants were presented with an auditory stimulus from the ba/pa continuum over and over again until they decreased the rate at which they sucked on a pacifier

Then, infants were presented with a novel auditory stimulus that differed in VOT from the original auditory stimulus by a fixed amount. When the novel stimulus was on a different side of the ba/pa category boundary than the original stimulus, infants' sucking rate ___, when the novel stimulus was within the same category as the original stimulus, infants' sucking rate ___. a. remained constant, remained constant b. decreased, increased c. increased, decreased d. increased, remained constant