“…The divergences might stem from several factors; for example, it may depend on how the different samples (undergraduates, adults, older adults) understand the construct of PWB; on the number of items conforming each dimension of the scale; or on method effects (Tomas, Meléndez, Oliver, Navarro & Zaragoza, 2010). These measurement inconsistencies have been reported in other studies (e.g., Burns & Machin, 2009; Kafka, Kozma & Kafka, 2014; Triadó, Villar, Solé & Celdrán, 2007), so it is common to observe that the Ryff's six‐factor model does not provide acceptable fit indices (Abbott, Ploubidis, Huppert, Kuh & Croudace, 2010; Díaz, Rodríguez‐Carvajal, Blanco et al ., 2006; Freire, Ferradás & Valle, 2017; Springer et al ., 2006). A three‐factor structure whereby self‐acceptance, life purpose, personal growth and environmental mastery are combined to form a single dimension has been reported to explain the structure of psychological well‐being (Abbott et al ., 2010; Burns & Machin, 2009; Kafka et al ., 2014), which resembles the self‐determination theory of Ryan and Deci (2000).…”