Deviation refers to the movement of a body part towards the extreme in its range of motion; usually associated with risk of injury.
In psychology, deviation refers to a statistical measure that indicates the degree of difference between a particular data point and the mean of the data set. It is often used to understand the degree to which a particular observation is different from the norm.
One common example of deviation in psychology is the use of standard deviation as a measure of variability in data sets. Standard deviation is a measure of the degree of difference between each observation and the mean of the data set, with a higher value indicating a greater degree of variability.
Another example of deviation in psychology is the use of the deviation IQ score, which is a measure of intelligence that compares an individual's performance on an IQ test to the performance of others in their age group. The deviation IQ score is calculated by comparing an individual's test score to the average score for their age group and then adjusting for the standard deviation of the scores in the group.
In addition, deviation is also used in research studies to understand the extent to which experimental results differ from expected results. The difference between the actual result and the expected result is referred to as the deviation, and researchers use this information to assess the validity and reliability of their findings.