another purchase would have been preferable is inconsistent with their action of purchasing the item. The difference between their feelings and beliefs causes dissonance, so they seek to reassure themselves. While not a theory of motivation, per se, the theory of cognitive dissonance proposes that people have a motivational drive to reduce dissonance. The cognitive miser perspective makes people want to justify things in a simple way in order to reduce the effort they put into cognition. They do this by changing their attitudes, beliefs, or actions, rather than facing the inconsistencies, because dissonance is a mental strain. Dissonance is also reduced by justifying, blaming, and denying. It is one of the most influential and extensively studied theories in social psychology. Temporal motivation theory A recent approach in developing a broad, integrative theory of motivation is temporal motivation theory. Introduced in a 2006 Academy of Management Review article, it synthesizes into a single formulation, the primary aspects of several other major motivational theories, including Incentive Theory, Drive Theory, Need Theory, Self-Efficacy and Goal Setting. It simplifies the field of motivation and allows findings from one theory to be translated into the terms of another. Another journal article that helped to develop temporal motivation theory, "The Nature of Procrastination", which received American Psychological Association's George A. Miller award for outstanding contribution to general science. where Motivation is the desire for a particular outcome, Expectancy or self-efficacy is the probability of success, Value is the reward associated with the outcome, Impulsiveness is the individual's sensitivity to delay and Delay is the time to realization. Achievement motivation Achievement motivation is an integrative perspective based on the premise that performance motivation results from the way broad components of personality are directed towards performance. As a result, it includes a range of dimensions that are relevant to success at work but which are not conventionally regarded as being part of performance motivation. The emphasis on performance seeks to integrate formerly separate approaches as need for achievement with, for example, social motives like dominance. Personality is intimately tied to performance and achievement motivation, including such characteristics as tolerance for risk, fear of failure, and others. Achievement motivation can be measured by The Achievement Motivation Inventory, which is based on this theory and assesses three factors (in 17 separated scales) relevant to vocational and professional success. This motivation has repeatedly been linked with adaptive motivational patterns, including