Which of the Following Examples Reflect Types of Experimental Manipulations

Multiple Choice

Which of the following examples reflect types of experimental manipulations? (circle all that apply)

A) Smoke pours into a room from under a door (smoke is presented to all conditions) .
B) In the instructions for a study, participants are told they will be subjected to electric shocks.
C) Half of participants are told their responses will be videotaped; the other half are not told their responses will be taped.
D) Some participants fill out surveys with plants in the room; some participants fill out surveys with pictures of plants in the room.