Usability Assessment Questionnaires (System Usability Scale (SUS)) and Standard User Experience Percentile Rank Questionnaire (SUPR-Q)  implement a Likert Scale.

University of Michigan - Ann Arbor

Likert Scale created by social psychologist Rensis Likert in 1932. Purpose: Measure user agreement/opinions. Users are presented with set of statements, where then the user specifies their level of agreement or disagreement with each statement. Finally, after all responses have been analyzed, an overall position for the user is constructed.

Likert Scales in Surveys

Rosala, M. (2020, June 7). Rating Scales in UX Research: Likert or Semantic Differential? Nielsen Norman Group. https://www.nngroup.com/articles/rating-scales/

Rating Scales in UX Research: Likert or Semantic Differential? 

Example (s) / Types of Likert Scales in Surveys 

1. Acquiescence Bias (Agreement Bias): the tendency of a respondent to agree with others. Demonstrates human priming (framing effect) to respond or select a positive response option. Diminish bias by alternating positively phrased statements --> negatively phrased statements. 

2. Social Desirability Bias: respondent provides an answer that is or will be regarded favorably by others. Fear disagreement reflects them badly. Diminish bias by not asking respondents for name/identification info. 

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