A developmental psychologist developed a training program to encourage children to reduce their Internet usage.To examine its efficacy he recruited a sample of 120 children - of whom 60 were aged 11 years and 60 were aged 13.Half of the participants were randomly assigned to the training program and the amount of online usage was measured after one month.Findings were subjected to two-way ANOVA, from which the output was as follows: Which of the following is true about the design of this study?
A)There are three factors: condition, age, and group
B)There are three factors: condition, age, and interaction.
C)There is one factor with two sub-factors: training program and age group.
D)There are two factors: condition and age group.
E)There is one factor - condition - because you ignore nonsignificant factors unless there is a confound.

Question

A developmental psychologist developed a training program to encourage children to reduce their Internet usage.To examine its efficacy he recruited a sample of 120 children - of whom 60 were aged 11 years and 60 were aged 13.Half of the participants were randomly assigned to the training program and the amount of online usage was measured after one month.Findings were subjected to two-way ANOVA, from which the output was as follows:  Which of the following is true about the design of this study?
A)There are three factors: condition, age, and group 
B)There are three factors: condition, age, and interaction. 
C)There is one factor with two sub-factors: training program and age group. 
D)There are two factors: condition and age group. 
E)There is one factor - condition - because you ignore nonsignificant factors unless there is a confound.

Quizplus · Accepted Answer

The design of the study involves two factors - condition (training program or control group) and age group (11 or 13 years old). The output from the two-way ANOVA shows the main effects of both factors and the interaction effect between them. Therefore, option D is the correct answer.

A Developmental Psychologist Developed a Training Program to Encourage Children