What is the difference between a lie scale and a consistency scale in validity testing?

• A. A lie scale detects exaggerated positive self-presentation, while a consistency scale identifies conflicting responses across related items.
• B. A lie scale measures response speed; a consistency scale measures fatigue.
• C. A lie scale detects reluctance to respond; a consistency scale detects truthfulness.
• D. They are the same type of validity indicator.

Answer: (A)

In validity testing, you’re looking at two different ways responses can go off course. A lie scale is designed to catch exaggeration of positive self-presentation—you’re trying to look better than you are, so the scale flags that tendency as a potential distortion that could inflate scores. A consistency scale, on the other hand, checks whether responses across related items line up. If someone gives conflicting answers to items that should be saying roughly the same thing, it signals careless or distracted responding, not a deliberate attempt to misrepresent themselves.

So the key difference is what each scale detects: lying about oneself versus being consistent or inconsistent in answering. The other ideas don’t fit because they point to response speed or fatigue, or they interpret consistency as truthfulness, which isn’t the intent of these scales. They’re distinct validity indicators serving different checks on the data.