Snack habit strength

The Self-Report Habit Index (SRHI)^{( 26 )} was administered to assess unhealthy snack habit strength. The SHRI includes twelve items (α=0·95) that address the automaticity of snack consumption (e.g. ‘Eating unhealthy snacks is something I do automatically’) on 7-point scales from 1 (‘totally disagree’) to 7 (‘totally agree’). As we were unfortunately limited in the number of items we could include in the questionnaire, only habit strength of eating unhealthy snacks and not habit strength for eating healthy snacks was included, as particularly unhealthy snack habit strength has been found to predict (unhealthy) snack intake^{( 33 , 34 )}.