Glossary category
Questions and Response Bias
How question formats and answering habits can shape personality-test results independently of personality.
Acquiescence Bias
Acquiescence bias is a response tendency to agree with statements regardless of what they say or which trait they measure. On agreement scales, it can inflate scores when most items point in the same direction. Balanced item wording, alternative response formats, and statistical models can help distinguish general agreement from construct-relevant answers.
Extreme Response Style
Extreme response style is a systematic tendency to choose the endpoints of a rating scale more often than the item content alone would predict. A respondent may repeatedly select options such as “strongly agree” and “strongly disagree.” This can exaggerate score differences and complicate comparisons across people or groups.
Forced-Choice Questionnaire
A forced-choice questionnaire asks respondents to choose between two or more statements instead of rating each statement independently. Personality measures may pair options that appear equally desirable and ask which is more like the person. This can reduce some response tendencies, but valid scoring requires a model that accounts for the comparative data.
Likert Scale
A Likert scale is a questionnaire format that asks respondents to indicate their level of agreement, frequency, importance, or another ordered judgment. A typical item uses five or seven response options from one endpoint to another. Multiple related items are often combined into a score, but wording and response habits can influence results.
Response Bias
Response bias is a systematic tendency to answer assessment items for reasons partly unrelated to the intended construct. Examples include agreeing regardless of content, choosing only extreme options, or presenting oneself favorably. Bias can shift scores in predictable directions, while random inattention mainly adds noise.
Social Desirability Bias
Social desirability bias is the tendency to give answers that create a favorable impression or conform to perceived social expectations. In personality testing, respondents may overreport admired behavior and underreport stigmatized behavior. The effect depends on the stakes, privacy, item wording, and how obvious the desirable answer appears.