Markland, Ryan, Tobin, and Rollnick (2005) pointed out that
SDT provides a meaningful framework for understanding how and
why MI works. Specifically, the authors argued that MI can be
understood as providing an autonomy-supportive atmosphere conducive
to clients finding an internal source of motivation, if it is
present. In terms of methods, MI practises can be aligned with
supporting each of the three basic psychological needs specified by
SDT, namely autonomy (through nondirective inquiry and reflection),
competence (through provision of information), and relatedness
(through a relationship characterised by unconditional positive
regard).