4. Operational definitions are encouraged in research in order to: a. make sure the research is publishable b. make terms used in a study as explicit as possible c. increase the probability that experiments will succeed d. make psychological research more easily understood by laypersons 9. What would be the best method for studying the effect of listening to rap music on aggressive behavior? a. case study b. experimental method c. correlational method d. naturalistic observation 30. Artrelle is taking part in a research study that examines her thoughts on the political election taking place in her country. Each night, before bed, she is to complete a questionnaire that gathers information on these topics. She submits her completed questionnaires to the researchers at the end of each week. What type of research method is being used? a. experience-sampling method b. diary method c. ecological momentary assessment d. day reconstruction method