As the spinal cord joins the brain, it widens into the

If cognitive stage means attaining a new set of intellectual abilities, then adulthood has no stages

Indicate whether this statement is true or false.

Longitudinal studies of changes in intelligence over the life span paint a more accurate

picture of reality than do cross-sectional studies because a. longitudinal studies require more time to conduct and therefore, researchers can make a more careful analysis of the important variables that influence development. b. cross-sectional studies do not take into consideration cohort effects, such as the fact that older people have had different educational and cultural experiences than younger people have had. c. cross-sectional studies tend to be conducted with biased samples. d. in cross-sectional studies, older people can be intimidated by the presence of younger people. e. participants tend to be more accurate when they know they will be re-tested, thereby increasing reliability.