Although problematic media use among adolescents is of wide interest, less is known regarding problematic media use among younger children. The current study reports on the development and validation of a parent-report measure of one potential aspect of children’s problematic use-screen media addiction-via the Problematic Media Use Measure (PMUM). Items were based on the nine criteria for Internet Gaming Disorder in the DSM-5. The first study describes the development and preliminary validation of the PMUM in a sample of 291 mothers. Mothers (80.8% identified as White) of children 4 through 11 years of age completed the PMUM and measures of child screen time and child psychosocial functioning. EFA indicated a unidimensional construct of screen media addiction. The final versions of the PMUM (27 items) and PMUM Short Form (PMUM-SF, 9 items) evidenced high internal consistency (Cronbach α = .97 and α = .93, respectively). Regression analyses were conducted to examine convergent validity of the PMUM with indicators of child psychosocial functioning. Convergent validity was supported and the PMUM scales also independently predicted children’s total difficulties in functioning, over and above hours of screen time, indicating incremental validity. The second study sought to confirm the factor structure of the PMUM-SF and test for measurement invariance across gender. In a sample of 632 parents, we confirmed the factor structure of the PMUM-SF and found measurement invariance for boys and girls. These studies support the use of the PMUM-SF as a measure of screen media addiction in children ages 4 through 11 years old.

The growth of mobile device access and ownership has yielded many opportunities and challenges for raising healthy digital media consumers. As adoption of mobile and internet‐connected devices has increased among children, concerns for healthy child development have been expressed regarding excessive or problematic use. Although much theoretical and empirical work has been conducted evaluating adolescents' and adults' risks for dependence on various screen media (e.g., Gaming Disorder, Internet Addiction), little theoretical consideration has been expounded regarding the etiology and maintenance of problematic media use earlier in childhood (i.e., under age 12 years). The purpose of this paper is to propose a theoretical framework through which to investigate problematic media use in early childhood. Our theory, the Interactional Theory of Childhood Problematic Media Use (IT‐CPU) merges developmental and clinical psychology theories, with communication and human‐computer interaction perspectives. We outline distal and proximal factors that we hypothesize contribute to the development of problematic media use in childhood, and emphasize maintaining factors that could be targets for intervention. Finally, we provide recommendations for an interdisciplinary research agenda to test our proposed theory and inform experimental trials to prevent and treat childhood problematic media use.

Children's mobile device (e.g., smartphone, tablet) access and ownership has grown substantially in the past decade. Concerns exist regarding excessive use and the impact of frequent consumption of mobile media on children's health and well‐being. We review the literature on the harmful physical health correlates of excessive mobile device use during childhood and adolescence. Strongest evidence emerged regarding the impact of excessive mobile device use and sleep outcomes. Mixed evidence emerged regarding excessive use of mobile devices and physical activity and obesity. Too few studies were identified to draw conclusions about mobile device use and the following health concerns in children: musculoskeletal outcomes/pain, ocular health, and migraine/headaches. Recommendations for future research on the association between excessive mobile device use and children's physical health outcomes (particularly investigations into the experience of musculoskeletal pain/discomfort, ocular symptoms, and neurological symptoms) are discussed.

Concerns have been raised about excessive or “addictive” phone use among adolescents, and the impact that addictive phone use (APU) can have on adolescent development and health. Most research on the physical health correlates of smartphone use has been limited to sleep health, whereas other outcomes, such as eating behaviors and obesity risk have not received as much attention. To address this gap in the literature, we examined the association between APU and emotion regulation difficulties, impulsivity, maladaptive eating behaviors, and adiposity in a sample of 111 adolescents. We found that APU is associated with greater emotion regulation difficulties, dysregulated eating, restrained eating, food addiction, and higher percent body fat. Further, we found that emotion regulation difficulties mediated the association between APU and dysregulated eating, restrained eating, and food addiction. Findings suggest that addictive phone use may confer increased risk for obesogenic eating behaviors and food addiction via challenges in regulating emotions.