Professor grant is interested in studying the development of a sense of humor. she collects data from groups of 6-year-olds, 16-year-olds, 26-year-olds, and 46-year-olds. what type of research design is professor grant using?

a. cohort design
b. longitudinal design
c. behavior genetics design
d. cross-sectional design

Which of the following is a personal responsibilty

For each of the following, mark whether it is a possible confounder (a factor that mixes up the results, making it look like candy is to blame when it's a causal (or causation) link which supports the argument that candy causes criminal behavior (ie, explains how candy leads to criminality ), or neither (an irrelevant factor, something that may cause people to become criminals but has nothing to do with eating candy). choose your answers based only< on the information given. additives in candy- additives found in candy may adversely affect brain development of young children in ways that could contribute towards adult aggression. impulsive personality-- kids who are highly impulsive and have trouble delaying gratification are more likely to eat candy every day as children and more likely to disobey laws as adults. violent abuse-- children who suffer violent abuse are more likely to become violent adults and commit violent crimes. gender- boys are overwhelmingly more likely to commit violent crimes

Which of the following was discovered in the piedmont region of north carolina in 1799?