| Subjective, nonlinear |
Low internal consistency computed |
| Ordinal scale with score meaning, level, differences, and divisions unknown |
Need for testing scale for responsivity to change over time |
| Scores cannot differentiate nor compare patients |
Can be affected by prior patient activities, but not recorded |
| All score sections reported, but what do they mean? |
Completed in a limited timeframe (clinic visit) |
| No connection to clinical stages |
Questions difficult to read and understand |
| Only native English-speaking rated and patients participated in initial testing |
Responses based on interpretation by rater and patient |
| Not enough participants in any other racial or ethnic group in evaluation (other than non-Latino Caucasians) |
Respondents may not answer appropriately, fear of score outcome, lower total scores |
| Effects of age, gender, race, and ethnicity on ratings have not been examined |
Based on physician's experience, inexperience |
| Need for non-English scale translations |
Nonmotor symptoms not clinically diagnosed |
| Interrater reliability needs to be established |
Cannot be used as a severity measure of any behavior |
