B.F. Skinner introduced what concept related to Thorndike’s law of effect?

When Gehrig is left at preschool, he cries and will not play with the other children for some time. According to Chess and Thomas, what type of temperament does Gehrig exhibit?

A. slow-to-warm-up B. easy C. difficult D. uninhibited

Which outcome is most likely to result from a longitudinal study?

a) a clear relationship between the cause of autism and its effects on families b) the natural course of autism c) a snapshot in time of what it is like to live with an autistic sibling d) inconclusive incidence rates of autism