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The concept of effect size in research

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Effect Size

An experimenter is examining the relationship between age and self-disclosure. A large sample of participants that are 25 to 35 years old and participants that are 65 to 75 years old are compared, and significant differences are found with younger participants disclosing much more than older people. The researcher reports an effect size of .34. What does this mean?

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From my understanding the effect size would essentially be the intensity or strength of the relationship between the sample of participants that are 25 to 35 years old, and the participants that ...

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This solution describes the concept of effect size in research.