Questionnaire development I: Measurement error and question writing - Rating scales

3 important questions on Questionnaire development I: Measurement error and question writing - Rating scales

What are two ways to structure rating scales?

Unipolar and bipolar.

What is a unipolar scale?

A unipolar scale has only one valence (positive or negative) and asks respondents to make a choice along that dimension.

What is a bipolar scale?

A bipolair scale has a midpoint at which there is a shift from positive to negative.

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