Weeks+9+and+10+Experiments+Reliability+and+Validity_all+slides

Weeks+9+and+10+Experiments+Reliability+and+Validity_all+slides

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Experimental Designs, Reliability & Experimental Designs, Reliability & Validity Validity Weeks 9 & 10
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Understanding Relationships in Research First question : Are variables related to each other? Second question: Are they correlated? Correlation does not imply a direction for the relationship Does establish: that a relationship exists; and the strength of that relationship Correlation is NOT causation Research as relationships
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Negative Negative Correlation Correlation Positive Positive Correlation Correlation
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Experimental Methods Testing directions of relationships— resulting from strong correlations, and hypotheses. If I do this, I expect this will happen
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Independent (X) Dependent (Y) Believed to influence another variable Believed to be changed by another: i.e., Y depends on X Manipulated by researcher in Experiment Measured by researcher in Experiment
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Confound Variables Variables not being controlled by the researcher—but that also vary systematically with the DV
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This note was uploaded on 11/11/2011 for the course COMMUNICAT Comm 300 taught by Professor Katz during the Spring '11 term at Rutgers.

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Weeks+9+and+10+Experiments+Reliability+and+Validity_all+slides

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