Although the adapted scheme has not drawn overtly from Self-determination Theory (SDT), it is hypothesised that the adapted scheme promotes greater environmental support of SDT-based psychological needs for participants than the standard EFH scheme. Autonomy is promoted through the increased choice offered through daily sessions and the involvement of the patient in their decision whether to take up the scheme, competence is encouraged through the tailoring of classes to the ability of EFH participants and the opportunity to observe similar others, and relatedness is supported through the social assimilation of participants through regular group activities.