Question

You are conducting a study to determine the impact of a new reading intervention on students test scores. You randomly assign 40 students to either the intervention group or the control group (those not participating in the intervention). You also break the students into morning and afternoon classes to determine which is the best time of day to conduct the intervention.

1. What is the dependant variable?

2. What is/are the independent variable(s)?

3. How many cells will there be?

4. If we divide the groups evenly how many students will appear in each cell?

5. What type of design is this? (Again, Be Specific!)

6. Assume that you conduct an ANOVA with 3 groups and 60 subjects (evenly divided between the 3 groups) and receive an F-value of 3.30. How would you write this result in a study? (Be sure to include whether or not it is a significant result)

Answer 1

You are conducting a study to determine the impact of a new reading intervention on students test scores. You randomly assign 40 students to either the intervention group or the control group (those not participating in the intervention). You also break the students into morning and afternoon classes to determine which is the best time of day to conduct the intervention.

1. What is the dependant variable?

Test score

2. What is/are the independent variable(s)?

There are 2 independent variables. Treatment(intervention, control) and time(morning ,afternoon)

3. How many cells will there be?

There are 2*2=4 cells

4. If we divide the groups evenly how many students will appear in each cell?

10 (40/4=10) students in each cell.

5. What type of design is this? (Again, Be Specific!)

Randomized block design.

6. Assume that you conduct an ANOVA with 3 groups and 60 subjects (evenly divided between the 3 groups) and receive an F-value of 3.30. How would you write this result in a study? (Be sure to include whether or not it is a significant result)

“There was significant mean difference among the three groups [F(2, 57) = 3.30, p < .05].