Evolved Psychological Mechanism:

This mechanism is universal in nature. Uncontroversial EPM has vision, memory, hearing and motor control. There are many examples that include differences in male and female mating preference and strategies, capture bonding, incest avoidance mechanisms and cheater detection mechanisms.

Source of Evolutionary Psychology:

The main sources of evolutionary psychology are cognitive psychology, genetics, ethology, anthropology, biology, and zoology. The term evolutionary psychology was probably coined by Ghiselin in his 1973 article in Science.

Leda Cosmides and John Tooby popularized the term in their highly influential 1992 book The Adapted Mind: Evolutionary Psychology and The Generation of Culture (ISBN 0195101073).

Evolutionary Psychology has been applied to the study of many fields, including economics, aggression, law, psychiatry, politics, literature, and sex. Evolutionary psychology is closely linked to the field of sociobiology, but there are key differences between them including the emphasis on domain-specific rather than domain-general faculties, the relevance of measures of current fitness, the importance of mismatch theory, and psychology rather than behavior.

Theoretical background:

William Paley, drawing upon the work of many others, argued that organisms are machines designed to function in particular environments. This idea is the foundation of modern medicine and biology. Prior to Darwin and Wallace, it was thought that the design evident in organisms was evidence for God. Darwin and Wallace's theory of evolution by natural selection provided a scientific account of the origins of function.

Evolutionary psychology is based on the presumption that, just like hearts, lungs, livers, kidneys, and immune systems, cognition has functional structure that has a genetic basis, and therefore has evolved by natural selection. Like other organs and tissues, this functional structure should be universally shared amongst humans and should solve important problems of survival and reproduction. Evolutionary psychologists seek to understand cognitive processes by understanding the survival and reproductive functions they might serve.

Controversies:

Animal behavior studies have long recognized the role of evolution; the application of evolutionary theory to human psychology, however, is controversial. There are many families of criticism of the idea. Some claim that because little is known about the evolutionary context in which humans developed (including population size, structure, lifestyle, eating habits, habitat, and more), there is little basis on which evolutionary psychology may operate.

Evolutionary psychologists use knowledge of the environment of evolutionary adapted nests to generate hypotheses regarding possible psychological adaptations and subsequently these hypotheses can be tested and evaluated against the empirical evidence in just the same way that any other hypothesis generated from any other theoretical perspective can be assessed.

Furthermore, there are many environmental features that we can be sure played a part in our species evolutionary history. Our ancestors most certainly dealt with predators and prey, food acquisition and sharing, mate choice, child rearing, interpersonal aggression, interpersonal assistance, diseases and a host of other fairly predictable challenges that constituted significant selection pressures.

Evolutionary Psychology is a way of generating testable hypotheses about the structure of the mind. All of psychology makes predictions about the structure of the mind. Because it commits to a very specific causal relationship between the mind and the environment in which its design was selected, evolutionary psychology is in fact a source of highly specific, concrete, and falsifiable predictions.