COMM 1 Lecture Notes - Lecture 4: Clinical Trial, Internal Validity, Physical Attractiveness

• School: Irvine Valley College
• Department: Communication Studies
• Course: COMM 1
• Professor: Rybold

Document Summary

Conclusion: tv violence is related to aggression. State how one variable changes influences another. E. g. , tv violence viewing will produce more aggressive behavior. Survey/ correlational research (research a) tests correlational hypotheses/ research questions. P. s. think survey as method, not an instrument. Ability to generalize results to other people and/or to normal life settings (e. g. , national) Experimental research (e. g. researcher b) tests causal hypothesis/ research questions. Manipulate variables/groups, control everything else, and measure effects. E. g. , same method as clinical drug trials. Ability to establish that x causes y. E. g. , not just relationship between variables but also establishes time order (which variable came 1st) E. g. , in a drug trial, the drug is the iv the cause in cause-effect relationship. E. g. in a drug trial, what the drug cured like pain the effect or outcome . Example hypothesis: greater physical appearance will create impressions of greater friendliness (from halo effect) Dv is what is being predicted by the iv.