As early as four months of age, infants ____

According to your authors, laboratory research generalizes

A) poorly from college undergraduates to other groups of people in other settings. B) poorly from experimental designs in the laboratory but well from correlational or naturalistic observation designs. C) well from laboratory settings to the real world, but only when undergraduates are not used as participants. D) well from laboratory settings to the real world.

A researcher, based on her review of relevant scientific studies, believes that there is a relationship between the frequency of a baby's crying and whether it was nursed at set intervals or on a demand schedule

If this belief were tested by experimentally manipulating feeding schedules, the feeding schedule would be called the: a. independent variable. b. dependent variable. c. extraneous variable. d. control factors.