“…His view is also supported by Kauffman (2006), who underlined the challenge of demonstrating the effectiveness of coaching due to lack of 'theoretical, scientific, or empirical explanations to support their assertions of coaching effectiveness' (p. 6), thus suggesting a hierarchical relationship between the two fields, whereby one field addresses another field's shortcomings. In contrast, other researchers claimed that both coaching and positive psychology may have a more reciprocal relationship (Lomas et al, 2017), and suggested that the use of PPIs in coaching may be questionable because coaching may be even considered a positive psychology intervention (Biswas-Diener, 20092009;Biswas-Diener, 2010;Lomas, 2019), thus blurring the boundaries of the fields. This is a rapidly growing trend in the latest literature heralding a more integrative approach to a positive psychology coaching practice (Van Nieuwerburgh et al, 2018).…”