Evaluating the Core and Full Protection Motivation Theory Nomologies for the Voluntary Adoption of Password Manager Applications

The protection motivation theory (PMT) is widely used in behavioral information security research, with multiple instantiations of the theoretical model applied in the literature. The purpose of this study is to perform a theoretical (conceptual) replication of both the core and full (PMT) nomologies in the context of voluntary password manager application use for individual home end-users. In our study, the full PMT model explained more variance than the core PMT model, but the relationships between multiple behavioral antecedents differed between the core and full PMT models, possibly due to differences in model complexity. Our findings suggest that researchers should justify the version of the PMT that they choose to use based on their research objectives with the understanding that the same variables may be significant in one version of the PMT but not significant in another version of the PMT.