__________ percent of infants' total caloric intake is devoted to growth

Catching fish when fishing in a lake would most likely represent which of the following schedules of reinforcement?

a. variable interval b. fixed ratio c. fixed interval d. interval ratio e. continuous-partial

Which of the following issues does not represent a common methodological concern for

researchers that work with different-aged adults? A) Older and younger adults are often drawn from sources that are convenient, but not necessarily representative. B) The oldest adults are frequently more educated than the younger adults. C) Equating adults in different age groups on demographic variables may influence the external validity of the results. D) Older adults are recruited using more varied means than younger adults.