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Likert scale

As explained in Effective Data Analysis

A Likert scale is an ordered response scale in which respondents indicate the degree to which they agree with or feel strongly about a statement or question.

A Likert scale is an ordered set of responses for indicating how strongly someone agrees with, or feels about, a statement or question. It is commonly used as a single-response format in surveys that measure perceptions, attitudes, beliefs, or experiences. section 6.2.2 section 6.4

When designing a scale:

  • Keep the response options balanced and use a moderate number of points, usually five or seven. section 6.4
  • Check the question as carefully as the scale: leading language, double-barreled statements, and negative wording can reduce response quality. section 6.4
  • Choose a different format when the task calls for something else. Rankings capture relative preferences; free-text boxes let respondents explain an answer. Use a finer-grained sliding scale only when that detail is meaningful to respondents. section 6.2.2

From a rating to context

A five-point scale might run from “Strongly Disagree” to “Strongly Agree.” An NPS question instead uses an 11-point single-response scale and is often followed by a free-text question asking why the respondent chose that answer. Organizations can track the resulting metric over time while examining the written responses for context. section 6.2.2

A scale records a self-reported response, not directly observed behavior. Its format and wording can shift the answers received, so interpret changes in results alongside how the question was asked. section 6.2.2 section 6.4

How Effective Data Analysis covers it

How deep it goes
Explains response-format choices and design cautions, but does not develop statistical analysis of scale results.
Examples
Uses a five-point agreement scale and an 11-point NPS question followed by a free-text prompt.
What you can do after
Practice/perform survey design by choosing balanced response options and checking wording before interpreting ratings.
How it connects
Links Likert scales to self-report measures, question wording, ranking questions, sliding scales, and behavioral measures.

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This explainer was generated by Manning's knowledge graph from the text of Effective Data Analysis. The section links point to the parts of the book it draws on.