Can Abnormality Be Defined On Statistical Grounds: Unraveling The Mystery
Psychopathology – Introducing Statistical Infrequency | Aqa A Level Psychology
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What Is The Statistical Definition Of Abnormality?
The statistical definition of abnormality, known as “Statistical Infrequency,” assesses behaviors in terms of their frequency within a given society. In essence, this definition characterizes a behavior as abnormal when it deviates significantly from what is considered common or typical within a particular population. In other words, if a behavior occurs with a rarity that falls outside the normative range for that society, it is labeled as abnormal according to this definition. This approach helps identify behaviors that stand out due to their infrequent occurrence in the context of a specific cultural or societal group.
What Is The Statistical Criteria For Abnormality?
The statistical criteria for determining abnormality involves identifying individuals who deviate significantly from the average within a given population. This concept is often expressed as the “two standard deviations from the mean” rule, which asserts that the outer 5% of a population distribution can be classified as abnormal. For instance, in the context of IQ scores, individuals scoring below 70 or above 130 would be considered abnormal according to this criterion. This approach helps us pinpoint outliers in data and is useful for various applications in statistics and psychology. (Note: The date “22nd March 2021” seems unrelated to the topic and has been omitted.)
Is Abnormal Behavior Statistically Significant?
Is abnormal behavior statistically significant? While abnormal behavior in individuals may not always be the norm, it is typically considered rare or statistically unusual. It’s important to note that while a particular abnormal behavior may seem uncommon, it’s not unusual for individuals to experience some form of prolonged abnormal behavior at certain stages in their lives. In other words, while these behaviors may be infrequent in isolation, their occurrence collectively within the population is not uncommon. This perspective helps us better understand the statistical significance of abnormal behavior in human psychology.
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According to Wegrocki (1939), abnormality cannot be defined on statistical grounds. Defining abnormality based on this standpoint is to catagorise behaviour that deviates from the norm of a population or group, with the norm being defined as the most prevalent behaviour (Foley, 1935).Statistical Infrequency is a definition of abnormality. According to this definition, a behaviour is seen as abnormal if it is statistically uncommon, or not seen very often in society.This definition states that the 5% of the population that fall more than two standard deviations from the mean are abnormal. So, in the IQ example people who score below 70 and above 130 are abnormal.
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