A researcher has computed two significant Pearson r values from

Your text describes a study about children's discovery of the counting-on strategy. The researchers presented children with more difficult addition problems than they would typically encounter prior to entering school. This description was used as an example of:

a. ethnographic research b. a naturalistic experiment c. a way in which seemingly harmless research can have negative ethical consequences d. a microgenetic design

Postponing childbearing until the late twenties or thirties

A) causes greater marital strain. B) eases the transition to parenthood. C) causes gender roles to become more androgynous. D) decreases the likelihood of the father's involvement in child care.