The association between problematic smartphone use, depression and anxiety symptom severity, and objectively measured smartphone use over one week
Problematic smartphone use (PSU) is associated with several types of psychopathology, such as depression and anxiety severity. However, the majority of studies reporting these associations have not used objective smartphone use data and/or repeated-measures study design. Our aim was to investigate how self-reported levels of PSU, depression, anxiety, and daily depressive mood relate to objectively measured smartphone use over one week.