Devine et al. are interested in assessing whether active versus passive play causes a preference for sweet or salty foods in toddlers. they assign groups of children to either an active play, passive play, or no play group and record their food choices when presented with a variety of sweet and salty foods. in this study, is the independent variable and is the control group.

a. active play;
b. passive play food choice;
c. no play no play;
d. type of play type of play;
e. no play

According to the federal regulations, which of the following studies meets the definition of research with human subjects? a researcher conducts a comparison of the comments made in a publicly available blog and the blogger's comments on a similar topic in a weekly magazine. undergraduate students in a field methods class are assigned a research question and asked to interview another classmate, to be followed by a class discussion on interview techniques. a cognitive psychologist enrolls undergraduate students for a computer-based study about the effect of mood on problem-solving behaviors. a researcher sets up a meeting with the superintendent of a large and diverse public school system to get data about the ethnic composition of the school system and the number of students receiving free lunches.