PSY 2810 Chapter Notes - Chapter 5: Theoretical Definition, Operational Definition, Scatter Plot
1 Oct 2016
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1st research makes a conceptual definition, then an operational definition. Categorical variables groups known as nominal variables as well. Ordinal scale ranked in an order (from 1 some number) Interval scale the values between to measurements. Ratio scale equal distances between #"s and have a true zero. Reliability how consistent the results of a measure are. Retest reliability same result found when retested. Interrater reliability consistent scored obtained no matter who measures the information. Internal reliability a study participants give a consistent pattern of answers. Scatter plot with two measurement for each person: correlation coefficient one number to indicate how close the dots on a scatterplot are, slope direction the direction of the relationships. Zero: strength is higher when the dots are all closer together. Cronbach"s alpha used to see if measurement scale has internal reliability. Face validity the extent that a measure appears to experts to be plausible.
