Table 2.

Summary of conceptual models applied to study of psychological endpoints^†.

Conceptual Model	Number of Studies	References
Direct Effect	73	[4, 5, 12–17, 21–23, 26, 28, 35, 36, 38, 40–42, 44, 46–48, 50, 51, 53–56, 58–61, 64–70, 72–80, 83, 84, 86, 87, 89, 90, 92–94, 97, 98, 100, 101, 103–107, 110–115]
Mediating	29	[16, 30, 33, 34, 38–40, 43–45, 49, 50, 52, 56, 57, 62, 63, 71, 74, 80–82, 85, 88, 91, 95, 96, 99, 102]
Moderating	15	[4, 5, 12, 29, 37, 53, 54, 58, 75, 89, 93, 103, 108, 109, 111]

^†Individual studies examined multiple endpoints; numbers of studies within domain/subdomain therefore exceed the total number of studies reviewed (N = 98).