A Developmental Psychologist Developed a Training Program to Encourage Children

Multiple Choice

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 statements is true?

A) The effect for age is large because it is less than .05
B) The effect sizes cannot be interpreted in this output due to overlap between variables
C) The results need to be interpreted with some caution as the table shows there were 179.414 errors in the output
D) The results cannot be compared to a random process because the study involved randomization (which is quite different to random sampling)
E) None of the above.