2 In a study of human development investigators showed two d

2.

In a study of human development, investigators showed two different types of movies to groups of children. Crackers were available in a bowl, and the investigators compared the number of crackers eaten by children watching both movies. One movie was shown at 8 AM (right after the children had breakfast) and the other at 11 AM (right before the children had lunch). It was found that during the movie shown at 11 AM, more crackers were eaten than during the movie shown at 8 AM. The investigators concluded that the different types of movies had different effects on appetite.

The treatment in this experiment is

A.   the number of crackers eaten.

B.   the different kinds of movies.

C.   the time each movie was shown.

D.   the bowls.

***for number 2, i know the answer is B, but i want an explanation why the answer is B. Please be specific.

Solution

In an experiment, the treatment is the variable which is supposed to bring the effect on the dependent variable.

Here, the dependent variable is the appetite. How are you supposed to change the appetite of children?

As you can see from the conclusion, \"The investigators concluded that the different types of movies had different effects on appetite.\"

As you can see, for the investigators, it is THE TYPE OF MOVIE that affected that appetite.

Thus, that is the treatment, OPTION B: THE DIFFERENT KINDS OF MOVIES. [ANSWER]