Downloading test packages
The test packages for administrating the PM-Scale questionnaire are available for download to registered users.
Registration is FREE and will only take a few minutes to complete. The test packages are available in French and English.
Each package contains the instruction sheet and the testing forms in 10 random orders.
Administering the questionnaire
The PM-Scale questionnaire is administered on an interview basis.
Patients are asked to estimate their perceived participation level in each life situation, when these last ones are encountered:
* In the last month which precede the filling out of questionnaire ;
* Whatever the strategy used in the life situation;
* Whatever the compensation allowed.
During the evaluation, a 3-level response scale is presented to the patients. Patients are asked to rate their perception on the response scale as either "Not at all", "Weakly” or "Strongly". Life situations not encountered in the last month are not scored and are entered as missing responses (tick the question mark).
The scores are entered as shown in the Figure 1.
Interpreting the participation measures
The evaluation report is presented in Figure 2.
The patient's participation level (vertical red line) and its 95% confidence interval (dotted red lines) are located on the participation scale (abscissa) expressed in logits. The higher the participation level of a patient is, the more the measure will be located to the right.
The logit is a linear unit that expresses the odds of success of the patient on any given item. The participation scale is centred on the average participating item (0 logit).
The item map lists the items from top to bottom by increasing participating order. The item map shows the most probable score (0 = "Not at all", 1 = "Weakly", 2 = "Strongly") to each item as a function of the participation representation of the subject and the underlying item's participation measure. Note also that the most probable score for any given item increases with the subject’s perceived participation.
The item map can be used for treatment planning and follow-up as it shows the item(s) that should be recovered first during the rehabilitation process.
The sigmoid curve shown at the bottom relates to the total score on the questionnaire to the participation measure (for a complete response set). Note that the score increases with participation level, although the increase is not linear given the shape of the curve. Therefore changes of participation level must be interpreted in linear logit units rather than in raw scores.
The patient's response to each item is circled (missing responses are not shown).
For any particular item, the range overlapping the 95% confidence interval indicates the most probable score(s) given the overall participation level measure. Note that in the example, most scores fit with the overall participation level and are coherent across items.
The evaluation report also indicates the patient's participation measure on the scale and the standard error of measurement (in logits). Keep those in your records in order to measure the patient recovery at a future occasion.