Scientific study of people. Two major issues: Measurement of personality –how do we know what a person’s personality is?? Will depend on what we think is important and our assumptions about personality (can we self-report, etc.)
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Two major issues:
= subjective because they require our interpretation
= consistency or repeatability of a measure
Example: measuring for window blinds
3. Inter-rater reliability = in observer ratings, the person making the rating is the measuring device. Raters who agree
Are you measuring what you think you are measuring?
Construct validity – does the measure capture the conceptual idea?
Method used depends on questions being asked and type of information needed and available
See chart in book on strengths and weaknesses, p. 58