Dr. Khan works for the marketing department of a company that manufactures mechanical toy dogs. Dr. Khan has been asked to assess the effectiveness of a new advertising campaign that is designed to be most persuasive to people with a certain personality profile. She brought four groups of participants to the lab to watch the video advertisements and to measure the likelihood that they would purchase the toy, both before and after watching the ad. What is the dependent variable?

hi your question lacks the needed result from the experiment involving the four groups.

attached to the answer is the graph

The dependent variable is the Agreeableness and conscientious of the group of participants

Explanation:

Dr Khan assessing the: effectiveness of a new advertising campaign ( independent variable ) that was designed to be most persuasive to people with a certain personality profile. from the results obtained the level of agreeableness and conscientious of the group of participants before and after watching the toy will determine if the toy will be purchased or not. therefore the agreeableness and conscientious of the group of participants( dependent variable ) depends on the effectiveness of the new advertising campaign.( independent variable ) both before and after watching the ad.