 From the 1960s to the early 1980s, computational models offered within psychology were mainly Turing-style models. These models embody a viewpoint known as the classical computational theory of mind (CCTM). According to CCTM, the mind is a computational system similar in important respects to a Turing machine, and certain core mental processes are computations similar in important respects to computations executed by a Turing machine.