Within-study measurement invariance of the UTAUT instrument: An assessment with user technology engagement variables.

•Establish within-study measurement invariance with variables within a single study.•Analyzed invariance of UTAUT scales with six users' technology engagement variables.•Conducted the full suite of seven different measurement invariance tests.•Identified invariant UTAUT scale items that can be safely used in future studies.•Also provide guidelines for conducting within-study measurement invariance analyses.