Aresearcher is interested in the effect background music in a store (fast or slow music) has on the amount of time consumers spend in the store. the researcher also manipulates the level of lighting in the store and considers the effect both of these variables have on time spent shopping. differences in dependent variable means (that is, the average time spent shopping) to a specific combination of the independent variables, such as fast music/bright lighting or fast music/dim lighting, etc. are called a(n):
a. combination effectb. interaction effectc. main effectd. crossover effect

b. interaction effect

Explanation:

Based on the information provided within the question these differences are called an Interaction Effect. Like mentioned in the question this effect refers to the effect that two or more independent variables have when combined together on a specific dependent variable which either increases or decreases significantly the effect as opposed to being separate. Which is what the researcher is trying to detect by combining different independent variables such as fast music/bright lighting or fast music/dim lighting, etc.

I hope this answered your question. If you have any more questions feel free to ask away at .

answer; commerce clearing house;