The Results from a Two-Factor ANOVA Show No Main Effect

question 43

Multiple Choice

The results from a two-factor ANOVA show no main effect for factor A but a significant interaction. What can you conclude based on this pattern of results?

• A) Factor A has no effect on the participants' scores.
• B) Factor A may have an effect but, if so, it depends on the levels of factor B.
• C) Because the interaction is significant, factor A must also have an effect.
• D) The effect of factor A is constant across all levels of factor B.

---

Definitions:

Minimal Risk

A research condition where the probability and magnitude of harm are no greater than those encountered in daily life or during routine physical or psychological examinations.

Greater Than Minimal Risk

Describes research situations where the probability and magnitude of harm or discomfort anticipated in the research are greater than those ordinarily encountered in daily life or during the performance of routine physical or psychological examinations or tests.

Full IRB Review

A full IRB review is a thorough examination by an Institutional Review Board of proposed research protocols that involve human subjects, to ensure the study's ethical and legal appropriateness.

Special Ethical Procedures

Guidelines or practices developed to address specific moral questions or dilemmas, often used in research or medical contexts.