Question

A school psychologist wishes to study the influence of three new curricula plans on the history achievement of junior high school students. Although the groups of students were selected on a fairly random basis, the psychologist has learned that there is considerable disparity among the groups with respect to verbal aptitude.

What is the appropriate design to use in this study?

Why is the design you named about appropriate?

List ALL variables involved in this design

State the appropriate research question

A school psychologist wishes to study the influence of three new curricula plans on the history achievement of junior high school students. Although the groups of students were selected on a fairly random basis, the psychologist has learned that there is considerable disparity among the groups with respect to verbal aptitude.

What is the appropriate design to use in this study?

Why is the design you named about appropriate?

List ALL variables involved in this design

State the appropriate research question

A school psychologist wishes to study the influence of three new curricula plans on the history achievement of junior high school students. Although the groups of students were selected on a fairly random basis, the psychologist has learned that there is considerable disparity among the groups with respect to verbal aptitude.

What is the appropriate design to use in this study?

Why is the design you named about appropriate?

List ALL variables involved in this design

State the appropriate research question

A school psychologist wishes to study the influence of three new curricula plans on the history achievement of junior high school students. Although the groups of students were selected on a fairly random basis, the psychologist has learned that there is considerable disparity among the groups with respect to verbal aptitude.

What is the appropriate design to use in this study?

Why is the design you named about appropriate?

List ALL variables involved in this design

State the appropriate research questionv

Answer 1

Appropriate Design: Randomized Block Design (RBD)

Why RBD: The very purpose of study is to evaluate the influence of 3 new curricula plans on history achievement of high school students. So, there is already one variable. Since the psychologist has learned that there is considerable disparity among the groups with respect to verbal aptitude, this could impact the result. Thus, verbal aptitude becomes another influencing variable. Although randomization could average out this effect, it is advisable to block the experimental units (students) with respect to verbal aptitude.

Variables:

Response variable: History achievement of high school students

Predictor variables (Factors): curricula plan, verbal aptitude

Research Questions:     

1. Do different curricula plans impact history achievement of high school students
2. Does verbal aptitude affect history achievement of high school students
3. Do these factors interact on history achievement of high school students