We don't need no stinkin' badges: The impact of reward features and feeling rewarded in educational games.
Brian McKernanRosa Mikeal MarteyJennifer Stromer-GalleyKate KenskiBenjamin A. CleggJames E. FolkestadMatthew G. RhodesAdrienne ShawEmilie T. SaulnierTomek StrzalkowskiPublished in: Comput. Hum. Behav. (2015)