 Mayer and Frantz conducted five studies when they introduced the CNS.All five studies showed “strong evidence that the CNS is a reliable and valid scale.” The goals of Study 1 were to test if the items on the scale have internal consistency and to establish convergent and incremental validity.The original internal consistency was alpha=.72, but after dropping three items that had negative inter-item correlations, the internal consistency raised to alpha=.84.