Use of qualitative methods to enhance content validity

Area of Science:

• Psychometrics
• Psychological Measurement
• Social Psychology

Background:

• Establishing content validity is crucial for psychometric measures.
• Qualitative data can enhance the development of new measurement instruments.
• Interpersonal relationships encompass complex constructs like social support, reciprocity, and conflict.

Purpose of the Study:

• To describe qualitative methods for enhancing the content validity of a new psychometric measure.
• To detail the process of using qualitative data to generate items for a new scale.
• To introduce the Interpersonal Relationship Inventory (IRI).

Main Methods:

• Qualitative interviews were conducted with 44 respondents familiar with interpersonal relationship concepts.
• Data from interviews were used to generate initial items for the Interpersonal Relationship Inventory.
• Expert review and initial psychometric evaluation were performed on the generated items and scales.

Main Results:

• Qualitative data provided a rich source for item development, reflecting respondents' understanding of interpersonal dynamics.
• The process facilitated the creation of items for the Interpersonal Relationship Inventory, covering social support, reciprocity, and conflict.
• Expert judgment and preliminary analyses informed the refinement of items and scales.

Conclusions:

• Qualitative methods are effective in enriching the conceptual understanding and item pool for psychometric measures.
• The described approach enhances the content validity of newly developed instruments.
• This methodology supports the rigorous development of measures like the Interpersonal Relationship Inventory.