Here's something you probably know. When asked, people say they would choose “good” snack rather than a “bad” one, and they probably mean it, but when the goodies arrive, they may just go ahead and get the bad one.

In an article in the September/October 2008 issue of the Journal of Nutrition Education and Behavior, Dutch researchers found that there is a substantial inconsistency between healthful snack choice intentions and actual behavior.

Witness the Waffles of Doom.

Participants were asked about their intentions among four snacks: an apple, a banana, a candy bar and a molasses waffle. About half of the participants indicated they would choose the apple or banana — a “healthy” snack. But when presented a week later with the actual snacks, long enough to forget the survery, 27% switched to the candy bar or waffle.

But over 90% of the unhealthy-choice participants stuck with their intentions and still chose the unhealthy snack. The study included 585 participants who were office employees recruited in their worksite cafeterias.

Although intentions are often tightly linked to what people really do, it doesn’t always work that way. One explanation is that intentions are usually under cognitive control while actual choices are often made impulsively, even unconsciously.

At times, the link between intentions and behavior is stronger. In healthy eating behavior, a strong positive attitude toward healthy eating, a high level of dietary restraint and regular consumption of healthy foods could increase the healthy intention-behavior consistency.

Investigator Pascalle Weijzen, Division of Human Nutrition, Wageningen University, The Netherlands, comments that “a substantial gap between healthy snack choice intentions and actual behavior was demonstrated. Despite that gap, the results suggest that individuals who plan to make a healthful choice are more likely to do so than those who plan to make unhealthful choices. Because more than 50% of the population seems to have no intention at all of making a healthful choice, identifying tools by which this group can be motivated to choose a healthful snack is strongly needed.”

Article: Pascalle L.G. Weijzen, MSc; Cees de Graaf, PhD; and Garmt B. Dijksterhuis, PhD,“Discrepancy Between Snack Choice Intentions and Behavior”, Journal of Nutrition Education and Behavior, Volume 40, Issue 5 (September/October 2008)