Table 2.

A hypothetical example of an item rating task to assess content adequacy of a questionnaire (inspired by MacKenzie et al. ^{( 34 )})

Rater=001 Sports Nutrition Knowledge Questionnaire (true/false statements)	Hydration	Recovery	Supplementation
For optimal recovery, athletes should drink 0·5 g of fluid for every 1·0 g of weight that is lost during training or competition	4	3	1
Creatine supplements would be most beneficial to a player wanting to increase peak power output during repeated bouts of exercise	1	1	4
Fluid consumed for hydration purposes (during exercise) should contain at least 4–8 mmol/l (~90–185 g/l) of sodium (salt)	5	3	2

Numbers represent the perceived extent to which each item captures each aspect of the construct domain using a 5-point Likert-type scale ranging from 1 (‘not at all’) to 5 (‘completely’).