Which of the following is an example of a factor that could skew normative values?

• A. All patients presenting the same diagnosis
• B. A diverse age range among test subjects
• C. High acuity levels in patients
• D. Optimal functional ability among the sample

Answer: (C)

The choice indicating high acuity levels in patients is a prime example of a factor that could skew normative values because high acuity implies that the patients being assessed are experiencing more severe symptoms or conditions compared to a typical population. This can result in skewed normative data, as the baseline for comparison becomes distorted. Normative values are intended to reflect the average performance or ability within a general population. However, when the sample consists predominantly of high-acuity patients, the results may not accurately represent the broader population's abilities or characteristics.

In contrast, other factors such as having all patients with the same diagnosis could lead to a more controlled group that may not reflect the general population. A diverse age range among test subjects and optimal functional ability among the sample also tend to provide broader and more representative normative data, rather than skewing it. Thus, high acuity levels introduce a significant bias that affects the reliability and validity of the normative values being established.