A researcher observing children and recording only those details that match his expectations would be

When researchers measure the volume of gray matter in babies' brains, they find _______

a. Children start the same, but by three years, children from higher SES families have more gray matter than infants born in low SES families. b. From birth on, infants born in high SES families have more gray matter than infants in low SES homes. c. Children start the same, but by three years, children from higher SES families have less gray matter than infants born in low SES families. d. Children from high SES families start with more gray matter at five months, but after three years, they have significantly less gray matter and more white matter than poor children.

A large study of heart disease that included White and African-American participants considered the age and gender of the participants but not their socioeconomic status. The conclusion drawn by the researchers was that being an African American male plac

a) no other races were included in the study. b) we can't tell if the variable is race or socioeconomic status. c) there were no African-American researchers on the team. d) we already knew African-Americans get more heart disease.