Jungsil Choi, et al., The Influence of Health Motivation and Calorie Ending on Preferences for Indulgent Foods, Journal of consumer research JCR;Consumer research , 46(3), 2019, pp. 606-619
Food and beverage manufacturers now regularly display .just below. calorie amounts (e.g., 99, 199, 299) in advertisements, presumably to appeal to health-motivated consumers. .Just below. values are those that fall one or more digits below a round number, most commonly seen as nine-ending numbers. However, although nine-ending prices are known to stimulate purchase intent, it is unclear whether or when nine-ending calorie labeling shapes food preferences. The present research shows that when consumers view indulgent foods with just-below (vs. round-ending) calorie amounts, they exhibit higher consumption intentions, purchase intent, and consumption behavior, yet only if they are high in health motivation. This is due to a tendency for health-motivated consumers to overweigh the leftmost digit in multidigit numbers.a cognitive bias known as the .level effect.. This bias results in the perception that just-below (vs. round) -ending indulgent foods have relatively fewer calories, decreasing anticipated guilt and increasing consumption intentions and behavior. The superiority of just-below calorie presentation under health motivation is attenuated with the addition of reference intake labeling (i.e., % daily calorie intake values), which equalizes the magnitude of nine- and round-ending calorie indulgent foods.