Pessimism is a negative mental attitude in which an undesirable outcome is anticipated from a given situation. Pessimists tend to focus on the negatives of life in general. A common question asked to test for pessimism is "Is the glass half empty or half full?"; in this situation, a pessimist is said to see the glass as half empty, while an optimist is said to see the glass as half full. Throughout history, the pessimistic disposition has had effects on all major areas of thinking. Etymology The term pessimism derives from the Latin word pessimus meaning 'the worst'. It was first used by Jesuit critics of Voltaire's 1759 novel Candide, ou l'Optimisme. Voltaire was satirizing the philosophy of Leibniz who maintained that this was the 'best (optimum) of all possible worlds'. In their attacks on Voltaire, the Jesuits of the Revue de Trévoux accused him of pessimisme. As a psychological disposition In the ancient world, psychological pessimism was associated with melancholy, and was believed to be caused by an excess of black bile in the body. The study of pessimism has parallels with the study of depression. Psychologists trace pessimistic attitudes to emotional pain or even biology. Aaron Beck argues that depression is due to unrealistic negative views about the world. Beck starts treatment by engaging in conversation with clients about their unhelpful thoughts. Pessimists, however, are often able to provide arguments that suggest that their understanding of reality is justified; as in Depressive realism or (pessimistic realism). Deflection is a common method used by those who are depressed. They let people assume they are revealing everything which proves to be an effective way of hiding. The pessimism item on the Beck Depression Inventory has been judged useful in predicting suicides. The Beck Hopelessness Scale has also been described as a measurement of pessimism. Wender and Klein point out that pessimism can be useful in some circumstances: "If one is subject to a series of defeats, it pays to adopt a conservative game plan of sitting back and waiting and letting others take the risks. Such waiting would be fostered by a pessimistic outlook. Similarly if one is raking in the chips of life, it pays to adopt an expansive risk-taking approach, and thus maximize access to scarce resources." Criticism Pragmatic criticism Through history, some have concluded that a pessimistic attitude, although justified, must be avoided to endure. Optimistic attitudes