Chap 2 PP - x HypothesisandTheory x x x Observation x x...

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Today we will discuss: Key Measurement Concepts Hypothesis and Theory Research Methods in Psychology Key Concepts for the Experiment Forms of Correlation and  Observation Ethical Principles in Research 
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Key Measurement Concepts Variable:   Any measurable quantity that can  vary or change.  May be  quantitative  or  qualitative Measurement:   A system or method for  assigning numbers to variables (or   “properties”).  Operational Definition:  Description of a  variable (property) in measurable terms.  Validity:  Whether the observation is a true  measure of the variable.  Construct validity   (meaningful) , predictive validity (of other  measures)   Reliability:   Whether the observation or  measurement can be repeated. 
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Hypothesis and Theory Hypothesis:  A testable statement, usually  specifying a  relationship
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