Question at position 17 A factorial experiment examines age group (children vs. adults) and feedback type (verbal vs. written) on test performance. Results show a main effect of feedback type, but no significant main effect of age or interaction between the two variables. What does this imply?Test performance differs by age group only.Interaction effects outweigh the main effectsFeedback type affects test performance, regardless of age group.Test performance is influenced by both age group and feedback type.单项选择题
A
Test performance differs by age group only.
B
Interaction effects outweigh the main effects
C
Feedback type affects test performance, regardless of age group.
D
Test performance is influenced by both age group and feedback type.

Question

Question at position 17 A factorial experiment examines age group (children vs. adults) and feedback type (verbal vs. written) on test performance. Results show a main effect of feedback type, but no significant main effect of age or interaction between the two variables. What does this imply?Test performance differs by age group only.Interaction effects outweigh the main effectsFeedback type affects test performance, regardless of age group.Test performance is influenced by both age group and feedback type.单项选择题

A

Test performance differs by age group only.

B

Interaction effects outweigh the main effects

C

Feedback type affects test performance, regardless of age group.

D

Test performance is influenced by both age group and feedback type.

BlackTom AI · Accepted Answer

We are given a factorial experiment with two factors: age group (children vs. adults) and feedback type (verbal vs. written). The results show a main effect of feedback type, but no significant main effect of age, and no significant interaction between age and feedback.

Option 1: 'Test performance differs by age group only.' If this were true, we would expect a significant main effect of age. But the report states there is no significant main effect of age, so this option contradicts the findings and is incorrect.

Option 2: 'Interaction effects outweigh the main effects.' The condition explicitly says there is no significant interaction between the two variables. Therefore, claiming that interaction effects outweigh main effects is inconsistent with the data and is incorrect.

Option 3: 'Feedback type affects test performance, regardless of age group.' This matches the reported main effect of feedback type with no interaction. It means feedback type has a significant effect on performance across both children and adults, i.e., the effect of feedback type is consistent across age groups. This option aligns with the results and is correct.

Option 4: 'Test performance is influenced by both age group and feedback type.' Since there is no significant main effect of age and no interaction, the data do not support an effect of age or an age-dependent effect of feedback. While feedback type does have an effect, age does not, so saying both factors influence performance overstates the findings. This option is therefore incorrect.

In summary, the only statement that coherently reflects a main effect of feedback type with no age effect or interaction is Option 3, making it the correct interpretation of the given results.