Do cartoon stickers given after a hemoglobin finger stick influence preschoolers' pain perception?

The purpose of this study was to determine if providing a sticker after a finger stick for hemoglobin check reduced pain perception among preschool-aged children. The hypothesis was: Sticker rewards influence the perception of pain as measured by the Oucher scale following a finger stick to check hemoglobin. Preschoolers from Headstart Centers in a southeastern city were recruited for the study.