“…For example, intervention or experimental psychopathology researchers might mix experimental methods with longitudinal data analytic methods to study how treatment effects or psychopathology unfolds over both short (Tang, Beberman, DeRubeis, & Pham, 2005) and long (Laurenceau, Hayes, & Feldman, 2007) periods of time. Researchers who study psychopathology might use structural equation (King, Luk, et al, 2018), latent class (Witkiewitz et al, 2013) or network analysis (Borsboom, Cramer, Schmittmann, Epskamp, & Waldorp, 2011) to study the structure of psychopathology, or use longitudinal models (King, Littlefield, et al, 2018) to study how psychopathology changes over time. Many clinical researchers must use methods that account for nesting of observations within clusters (such as multiple observations of the same people, or multiple clients nested within providers nested within organizations) (McNeish, Stapleton, & Silverman, 2016).…”