CRCJ 3001 Chapter Notes - Chapter 6: Internal Validity, Pearson Product-Moment Correlation Coefficient, Selection Bias
3 Oct 2018
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6. 1 research strategies: research strategy: a general approach to research determined by the kind of question that the research study hopes to answer. The descriptive research strategy: descriptive research strategy: measuring variable or set of variables as they exist naturally to produce a description of individual variables as they exist within a specific group, ex. + to measure strength of relationship: only attempts to describe, not explain, the relationship (if one exists, ex. as wake-up time increases, gpa tends to decrease. Technique comparing two or more sets of scores: first variable used to differentiate the groups, second variable measured to obtain a score, systematic diff. btwn the 2 groups = evidence of a relationship. Internal validity: study produces a single, unambiguous explanation for the relationship btwn 2 variables: threat to internal validity: any factor that allows for an alternative explanation, ex. weather.
