PSY 230 Lecture Notes - Lecture 8: Rorschach Test, 16Pf Questionnaire, Young Mania Rating Scale
Document Summary
Levels of measurement: quantitative variables, differ in terms of amount; different values contain more or less of the variable, qualitative variables, different values of these variables are different in quality. Different levels of measurement reflect the degree of quantification of the measures. Nominal: differ in name (e. g. , gender, eye color, limited statistical manipulations, ordinal, vary in order of quantity ( e. g. , first, second, and third place in a race, non-parametric statistical analyses. Interval: intervals between the values of the variables are equal (e. g. , iq scores, can use parametric statistical analyses. Ratio: like interval variables but with a true zero point (e. g. , temperature in. Kelvin: can use the greatest variety of statistical analyses. In descriptive research, precise measurements can improve the accuracy of our description of a population: when testing a research hypothesis, precision increases our chances of finding a statistically significant result, measures should be as precise as possible.
