The Communicative Participation Item Bank-Gender-Diverse Version: Item Bank Calibration and Short Form

Area of Science:

• Speech and Language Pathology
• Psychometrics
• Health Outcome Measurement

Background:

• The original Communicative Participation Item Bank (CPIB) may not be suitable for gender-diverse clients due to its wording.
• Developing a tailored instrument is crucial for accurate person-reported outcome measurement in this population.

Purpose of the Study:

• To calibrate a new version of the Communicative Participation Item Bank (CPIB) specifically for gender-diverse clients.
• To ensure the new item stem and wording changes are acceptable and appropriate for transgender respondents.

Main Methods:

• Collected survey data from 434 transgender individuals (219 AFAB, 215 AMAB) on 47 candidate items.
• Utilized item response theory (IRT) to analyze unidimensionality, local dependence, model fit, and differential item functioning (DIF) between AFAB and AMAB groups.

Main Results:

• Reduced the item bank from 47 to 31 items after removing 16 items due to local dependence.
• Confirmed unidimensionality and found no evidence of DIF between AFAB and AMAB participants.
• Established good to high reliability for both the full and short forms of the new CPIB-GD within specific T-score ranges.

Conclusions:

• The Communicative Participation Item Bank-Gender-Diverse (CPIB-GD) is a validated outcome measurement tool for gender-diverse clients.
• Clinicians should use the CPIB-GD exclusively for this population, as the original CPIB wording is not acceptable.
• The original CPIB remains appropriate for its intended populations.