An adjective checklist would most likely be used by a

Which of the following is at the center to sensitive periods of development?

a. behavior b. genetics c. emotion d. environment

Professor Golder is studying hyperactivity in preschool age children. She is concerned that differences in child rearing, diet, and so forth may affect her results

To minimize these potential preexisting variables, she should be sure to do which of the following? a. Use random assignment when forming her groups. b. Include an independent variable. c. Include a dependent variable. d. Assign boys to the experimental group and girls to the control group. e. Include multiple confounding variables.