McGill Pain Questionnaire (MPQ-102)

Description

The McGill Pain Questionnaire (MPQ-102) is a pain assessment instrument developed by Melzack and Torgerson to support the systematic investigation of the qualitative characteristics of the pain experience.

The underlying approach of the instrument is based on the idea that pain is not defined solely by intensity, but can also be described through different verbal qualities. For this reason, a broad set of pain-related descriptive words was used to organize the various aspects of pain into distinct categories.

Purpose

The main purpose of the McGill Pain Questionnaire is to provide quantitative measures of clinical pain that can be subjected to statistical analysis and used to draw conclusions about patients’ pain experiences.

This approach aims to transform the subjective verbal description of pain into more systematic and analyzable data.

Development and Structure

During the development of the instrument, groups of participants were asked to classify 102 words derived from the clinical literature on pain.

These words were organized into smaller groups describing different aspects of the pain experience. Based on the classification data, the descriptors were arranged into 3 major categories and 16 subcategories.

Each subcategory consisted of words that most participants considered qualitatively similar and was assigned a corresponding descriptive label.

Scoring

According to the provided source, groups of physicians, patients, and students rated the pain descriptors using a numerical scale ranging from:

1 = Mild

to

5 = Excruciating.

This procedure was used to represent the perceived intensity associated with different verbal descriptions of pain.

Statistical Analysis

The statistical approach described in the source material was primarily based on the classification of the 102 pain-related words and their grouping into broader categories and subcategories.

This process made it possible to identify groups of descriptors that were considered qualitatively similar by participants and to organize different characteristics of the pain experience in a systematic manner.

Validity and Reliability

The source document reports that the correlations among the three questionnaire indices were statistically significant.

This finding is described as evidence of internal consistency among the three indices used in the questionnaire.

The provided material does not include additional numerical reliability coefficients or detailed information on specific forms of validity.

Applications

The MPQ-102 can be used for the systematic description of clinical pain and for converting qualitative verbal descriptions into data that can be analyzed statistically.

Its structure allows researchers and clinicians to examine different characteristics of pain through verbal descriptors and can contribute to a better understanding of how patients perceive and describe painful experiences.

References

Melzack R, Torgerson WS. On the language of pain.

Note: The provided source identifies Melzack and Torgerson as the authors but does not include the complete bibliographic details of the publication.