Table 4.

Summary of participants consistently classified as positive, non and negative responders to portion size reductions across all portion size contrasts.

	Consistently classed as + ve responder	Consistently classed as non-responder	Consistently classed as –ve responder	Inconsistent responder classification
Study 1 (n = 45)	13 (29%)	3 (7%)	1 (2%)	28 (62%)
Study 2 (n = 36)	7 (19%)	0 (0%)	0 (0%)	29 (81%)
Study 3 (n = 30)	6 (20%)	4 (13%)	0 (0%)	20 (67%)
Across studies (n = 111)	26 (23%)	7 (6%)	1 (1%)	77 (69%)

‘Consistently classed’ indicates participant was a +ve, non or –ve responder across all 3 portion size reduction contrasts (i.e. large-normal vs. smaller than normal, large-normal vs. small-normal, small-normal vs. smaller than normal). Inconsistent classification indicates number of participants whose responder classification was not the same across all 3 portion size reduction contrasts.