An experiment is conducted on the effect of age (5 yr, 10 yr and 15 yr) and treatment condition experimental versus control) on reading speed. Which Statistical term (main effect, simple effect, interaction, specific comparison) applies to each of the descriptions of effects.
a. The effect of the treatment was larger for 15-year olds than it was for 5- or 10-year olds.
b. Overall, subjects in the treatment condition performed faster than subjects in the control condition.
c. The age effect was significant under the treatment condition.
d. The difference between the 15- year olds and the average of the 5- and 10- year olds was significant.
e. As they grow older, children read faster.