Hello
I wanted to ask which type of scale are you using? is it the negative to positive or positive and vice versa? And what is the reason behind your decision? Do you see much bias? Do you see much false negatives? etc.
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Hello, AnnaP
Qualtrics utilizes two primary scale types, with the choice depending on the specific construct being measured:
Types of Scales
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Bipolar Scales (Negative to Positive): Used for constructs that span a spectrum, capturing both negative and positive sentiment (e.g., satisfaction, agreement). These typically include a neutral midpoint.
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Unipolar Scales (Zero to Positive): Used for constructs that measure only the degree or presence of a positive attribute (e.g., effectiveness). These scales start at zero or the lowest point and move toward a positive extreme.
Rationale and Best Practice
The decision is rooted in survey methodology best practices to ensure valid and reliable data. Bipolar scales are used for spectrums, while unipolar scales are used when only the degree of presence matters.
Minimizing Bias
To minimize bias and unreliable data, Qualtrics recommends:
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Clear Labeling: Labeling every scale point clearly.
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Balanced Options: Using mutually exclusive and balanced options.
False negatives are less common if the scale is well-designed; research supports including a neutral midpoint to prevent ambiguous choices.
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