Autopsy studies have found that some areas of the brains of homosexual men are more similar to those of heterosexual women than of homosexual men

A study comparing cultures that use proximal, distal, and intermediate styles of caregiving found that

a. infants in the culture with the proximal caregiving style developed self-recognition later than infants in the other cultures b. infants in the culture with the distal caregiving style developed self-regulation earlier than infants in the other cultures c. differences across theses cultures emerged only for the development of infants' self-regulation d. there were no differences across these cultures in the development of infants' self-recognition

Last fall, a state college introduced a one-week study skills course for new freshmen students. At the end of the academic year, the college compared the grades and dropout rate for their freshmen with the corresponding measurements for freshmen at a neighboring state college. This study is an example of a ____

a. posttest-only nonequivalent control group design b. pretest-posttest nonequivalent control group design c. differential research design d. time-series design