The value of variety and scarcity across development.

An important task that children face is determining the value of items, and two possible cues to value include scarcity and variety. In three studies with 289 children aged 4-12years and 148 adults, we examined the use of these cues to guide choices when making selections among items. At all ages, participants typically preferred varied sets for themselves and others. In contrast, scarce items were rarely preferred to abundant items. However, when in the context of multiple recipients, participants selected scarce and varied items more when items were maximally scarce. Our results suggest that the preference for variety is early emerging, whereas the preference for scarce items is context dependent.