PSYC 2001 Lecture Notes - Lecture 5: Likert Scale
27 Oct 2018
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As you move from one scale to the next (follow the arrow) each scale adds one new criteria from the previous scale. Impossible to define any quantitative values or differences across categories. We convert information to numbers (computers can assist us) but there is no natural" unit or value to the categories. No absolute zero point (may have abstract zero) Has magnitude; values are smaller or larger than the next. Interval between items is known and is meaningful. The terms categorical and continuous are used to describe data/scores. The mathematical procedures allowed for interval and ratio data are the same. Thus, they are blended into a single category called continuous. When we have a single question on a likert response scale . Most research does not use a single question to measure a construct/concept. Multiple items (each on a likert scale) to assess a single concept. The combination of answers (average or sum) is then used as the.
