The reason the last option on a long menu is chosen least

A restaurant with a forty-item menu tracked orders over six months. Items in positions thirty-five through forty received three percent of orders combined, while items in positions one through five received thirty-seven percent. Moving a popular dish from position two to position thirty-eight cut its orders by fifty-four percent. Position, not preference, decided the plate.

What everyone sees

Diners believe they chose what they wanted. They attribute the skew to the top items being “the best dishes.” The declining consideration of later options is invisible because by the time a diner reaches item thirty-five, evaluation fatigue has already settled the decision — they just have not noticed yet.

What is actually happening

Iyengar and Lepper’s choice-overload research showed that large assortments reduce decision quality and satisfaction. Baumeister’s ego-depletion model adds that each evaluation draws from a limited self-regulatory pool. By the time the diner reaches the bottom of a forty-item list, the pool is depleted and the brain defaults to an option that was already processed — typically one from the top of the menu, which benefited from primacy and full attentional resources.

Why it stays hidden

Position hides because menus look democratic. Every item occupies the same space and font size, implying equal consideration. The structural inequality — that top items are evaluated with full resources and bottom items with depleted ones — is invisible in the layout and goes unquestioned by the diner.