Supplementary file 1_Does the phubbing scale measure the same construct across sexes? Evidence from a Nigerian sample.docx

Introduction

Phubbing is associated with excessive use of digital technologies, and the Phubbing Scale (PS) is widely used to measure it. The PS may be influenced by cultural variations, so it is advisable to validate it before applying it in a new cultural context. Phubbing has emerged as a construct of interest in Nigeria, yet no validation studies for the PS have been conducted in this population.

Methods

To address this gap, the PS, along with scales measuring technological addictions and digital life balance, was administered to 396 Nigerian university students (18 to 25 years old; 80.6% female). Confirmatory Factor Analysis was used to test two 10-item models and one 8-item model. The best-fitting model was subsequently tested. Internal and external validity, and measurement invariance across sexes were assessed.

Results

The 8-item correlated two-factor model (PS-8) showed the best results. For PS-8, internal and external validity, and strict measurement invariance across sexes were supported based on global fit indices. However, parameter estimates suggested potential sex-related differences in the construct. In females, factor loadings and the correlation between factors were adequate, whereas in males several items of Factor 2 showed low loadings, and the correlation between factors was negligible.

Conclusion

In conclusion, the PS-8 appears suitable for measuring phubbing in this population, although potential sex-related differences should be considered. These differences may stem from psychometric limitations in the Smartphone Obsession factor items and/or from variations in how the PS construct manifests across sexes, which could affect interventions or comparative studies. Considering the limitations of the study, future research will be necessary to corroborate these findings.