This document discusses the work and theories of David McClelland regarding achievement motivation and the need for achievement (nAch). McClelland developed a projective test using ambiguous pictures to study individuals' nAch by analyzing the stories they generated. High nAch individuals told ambitious, goal-oriented stories while low nAch individuals' stories involved yielding to pressure or avoiding responsibility. McClelland found nAch correlated with risk-taking, parenting styles, career choice, and economic growth. Later theorists expanded on these ideas around attribution and locus of control.