In seeking participants for research studies, researchers must explain the purposes and procedures of the study in advance, obtain written permission, and allow participants to stop at any time. This process is known as:

When her brother bumps his elbow on the table, 2-year-old Nadia gives it a kiss. Nadia is displaying

A) emotional self-regulation. B) social referencing. C) empathy. D) a categorical self.

Family adjustments to disabilities that are ____ in nature are typically most

difficult. a. cognitive b. physical c. motor d. both b and c e. none of the above