EMA is increasingly used to collect participant's information in their real environment and in real time. There are multiple studies focused on the evaluation of mood disorders in children and adolescents, but only a few of them used EMA protocols. Results found in this review showed a wide variability of works with different fields of study, methodological approaches, and EMA protocols. More than 60% of EMA studies in children and adolescents with mood disorders were conducted via phone call, showing high completion rates with data missing in 5 to 11.5% of the calls. Length of studies varied from a 4-day EMA protocol to a maximum of 8 weeks. Positive and negative affect, daily activities, and social context were the main EMA measures. Despite the limited number of studies using EMA in children and adolescents with mood disorders, EMA was useful in assessing mood symptoms in the moment and in patients' real-life environment. Studies also showed high completion and satisfaction rates. Although web pages and apps use have been increasing over the past years, the evidence base is still scarce. Future studies can facilitate understanding of EMA methodology among youth with mood disorders.

Ecological momentary assessment is an excellent tool for the measurement of different day-to-day domains in patients and capturing real-world and real-time data. The purpose of this review is to evaluate feasibility in current ecological momentary assessment studies on emotional and behavioral functioning, functional impairments, and quality of life patients with an attention-deficit/hyperactivity disorder diagnosis. This systematic review follows the recommendation of Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) guidelines selecting articles published from January 1, 1990, up to the latest access on May 2018, identifying a pool of 23 eligible studies. Twenty-three studies demonstrate the validity of ecological momentary assessment methodology in evaluating different aspects of patients with attention-deficit/hyperactivity disorder. Fifteen studies focus on the child's or adolescent's daily behavior, while eight studies only focus on adults. The studies presented in this review monitored patients and their families over a maximum period of 28 days. We can conclude that ecological momentary assessment can be successfully implemented with attention-deficit/hyperactivity disorder patients to evaluate diverse backgrounds. However, more studies are needed with a longer monitoring period, especially in adolescents, to determine the effectiveness of ecological momentary assessment on patients with attention-deficit/hyperactivity disorder.

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