According to the DSM-5, the behaviors of conduct disorder fall into three different categories. Which of the following is not one of the three?

When a researcher assigns participants to either an

experimental or a control group based on their last names, systematic differences between groups are created before the experiment even begins. This is a confounding variable referred to as _____ a) observer bias. b) participant bias. c) selection bias. d) assignment bias.

The conservation of liquid task directly assesses a child's level of

a. intelligence. b. habituation. c. animism d. centration.