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Psychology 290 Lab #2 Sept. 26 – 28. Types & Parts of Articles Operational Definition Variables Reliability & Validity. Types of Articles Research Report Review Article Theoretical Article. Parts of Articles Title Abstract Introduction Method Results Discussion References.
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Psychology 290Lab #2Sept. 26 – 28 • Types & Parts of Articles • Operational Definition • Variables • Reliability & Validity
Types of Articles Research Report Review Article Theoretical Article Parts of Articles Title Abstract Introduction Method Results Discussion References
Operational Definition • “A precise description of the procedures the researcher followed in order to observe or measure a variable” [Relates a concept to specific operations]. • Allows for knowing exactly what you are studying and directs how to study/measure it. • Example – Defining Aggression • Verbal • Physical • Indirect
Variables • Independent • manipulated by the experimenter • Dependent • not under the control of the experimenter • the measured variable • Extraneous • Other variables outside the focus of the study that may affect the results • Qualitative (categorical) vs. Quantitative (measurement) • Continuous (all values) vs. Discrete (limited values)
Reliability & Validity • Reliability • refers to the consistency of a measurement • e.g. repeated measurement should yield consistent results when used under the same conditions • Validity • Refers to the accuracy of the measurement • i.e. the measurement used is accurately measuring what it is intended to
Reliability Test-retest Internal Consistency Alternate Forms Inter-rater Validity Face validity Content validity Construct validity Criterion validity Types of Reliability & Validity