Dr. Phillips is a cognitive-developmental psychologist who studies how children learn mathematical principles. His current interest is in studying how children learn multiplication. He recruits 54 second-graders who have not yet learned how to multiply numbers to participate in his study. He is curious as to whether different teaching styles lead to better mastery of the subject. One condition (A) involves having students read a chapter on multiplication from their textbook. One condition (B) involves having students watch a video of cartoon characters explaining multiplication. One condition (C) involves having students being taught multiplication from a teacher. One condition (D) involves having students being taught multiplication by a fourth-grader. In all conditions, participants spend 30 minutes learning the fundamentals of multiplication and are then given the same 15-question multiplication test. The number of questions answered correctly is recorded.

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Complete Question;

Dr. Phillips is a cognitive-developmental psychologist who studies how children learn mathematical principles. His current interest is in studying how children learn multiplication. He recruits 54 second graders who have not yet learned how to multiply numbers to participate in his study. He wonders if different teaching styles lead to different levels of mastery of the subject. Condition 1 involves having students watch a video of cartoon characters explaining multiplication. Condition 2 involves having students being taught multiplication by a teacher. Condition 3 involves students being taught multiplication by a fourth grader. In all conditions, participants are given instruction for the same amount of time, and then are given the same 15-question multiplication test. The number of questions answered correctly is recorded.

[a] How many levels does the IV have?

[b] Is the IV measured or manipulated?

[c]Use the exact words from the description above to how is the DV operationalized?

a. 3

b. Manipulated

c. questions answered correctly

Explanation:

IV in the above Question means independent variable. An independent variable is a variable in an experiment that is said to be changed or manipulated so that we can obtain a particular result from the experiment.

DV in the above question means Dependent variable. A dependent variable is a variable that is variable that a person expect to occur in an experiment.

a) How many levels does the IV have?

In the above question,the independent variable has 3 levels because, 3 conditions were given.

b) Is the IV measured or manipulated?

In the above question, how to multiply is the the independent variable in this question and it is manipulated because it is been taught to students in different ways.

c) Use the exact words from the description above to how is the DV operationalized?

The number of questions answered correctly is recorded.