English: Motivations categories as adapted from West et al (2021). Adapted from the motivations categories as described by West et al (2021). West et al (2021) notes that the boxes show where motivations categories map relative to one another and from where they are derived. Finkelstien (2009) shown via orange boxes with short-dashed outlines. Batson, Ahmad, and Tsang (2002) shown via green boxes with long-dashed outlines are from. Clary and Snyder (1999) shown via yellow boxes with solid outlines are from. Other sources shown via blue boxes with short-long-dashed outlines. The motivation categories presented to survey respondents in the study by West et al 2021 are shown via red italic text. Adaption includes green text referring to the approach used with SDT = Self-Determination Theory, and VFI = Volunteer Functions Inventory.