Mental Retardation: Causes and Effects Alan A. Baumeister Louisiana State University Alfred A. Baumeister Vanderbilt University The most general description of mental retardation typically is presented in terms of an individual's failure to demonstrate skills that are age-, cultural-, and situa tional-appropriate. Mental retardation is a problem of human development, an ex pression of behavioral differences among people as reflected in speed and quality of adaptation and adjustment to changing demands of environments. Although adapta tion can take many forms in different situations, the essence of this fundamental qual ity or attribute, for layman and professional alike, is inherent in the term commonly known as intelligence. Despite obvious individual differences in many characteristics among people with mental retardation, they do, both by intuition and formal definition, share one com mon feature: diminished intelligence. Concepts of mental retardation and intelli gence, by tradition and practice, are inextricably interwoven. An understanding of mental retardation demands a consideration of intelligence, notwithstanding the ageless and acrimonious debate as to the essential nature or meaning of "intelli gence." Broadly conceived, intelligence refers to ability to solve problems regarded as important within a cultural milieu. Because of commonly accepted defining fea tures that incorporate cultural standards, mental retardation is as much a sociological as a biological concept. Linkage of mental retardation to the construct of intelligence, along with myriad other social implications concerning causes and consequences, has resulted in a his tory throughout which the concept of mental retardation has been buffeted about in divisive and frequently contradictory ways. Practical effects of value judgments are enormous because they determine who is included and excluded from health and education services and even which services are available. In fact, the concept of
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