The aim of the current work was to investigate relations between problematic smartphone use (PSU) severity and intolerance of uncertainty, a transdiagnostic psychopathology construct reflecting individual differences in reacting to uncertain situations and events. In addition, it was tested if use of social and/or non-social smartphone use mediated associations between intolerance of uncertainty and PSU.
Although associations between problematic smartphone use (PSU), or impaired functioning in different aspects of life due to excessive smartphone use, and psychopathology are well-established, the body of research including objectively measured smartphone use (OMSU) is relatively small. In addition, the majority of these studies relies on cross-sectional self-report data. The aim of the current study was to fill that gap.