Commitment to Self-Tracking Among Wearable-Device Users: Validation of the C2ST Scale and Known-Groups Evidence

Area of Science:

• Behavioral Science
• Psychometrics
• Digital Health

Background:

• Commitment to self-tracking involves sustained user investment in wearable and app-based self-monitoring.
• Validating measurement tools is crucial for understanding user engagement with digital health technologies.

Purpose of the Study:

• To validate the Commitment to Self-Tracking (C2ST) scale in Czechia.
• To examine the scale's dimensionality, reliability, and known-groups validity.

Main Methods:

• A survey of 502 Czech self-tracking device users was conducted.
• Exploratory and confirmatory factor analyses (EFA & CFA) assessed scale structure.
• Reliability (Cronbach's α, McDonald's ω) and known-groups validity were examined.

Main Results:

• The C2ST scale demonstrated high internal consistency (α = 0.968, ω = 0.968) and a unidimensional structure.
• Confirmatory factor analysis indicated an adequate-to-excellent model fit.
• The scale showed significant differences across social comparison, data sharing, and perceived usefulness, supporting known-groups validity.

Conclusions:

• The Czech version of the C2ST scale is reliable and psychometrically sound.
• The scale exhibits strong validity for assessing self-tracking commitment in users.
• The C2ST scale is suitable for research on self-tracking commitment and persistence.