Normal Curve (Psychology)

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  • A commonly observed phenomenon in psychological data. In a normal curve, or normal distribution, the majority of scores tend to fall in the middle of the distribution, with fewer and fewer scores occurring toward the extremes. In a truly normal distribution, scores are dispersed in such a way that the mean, median, and mode all have the same value. When a distribution has this property (or, as is more often the case with psychological data, when the shape of a particular score distribution closely aligns with a normal distribution), the standard deviation of the distribution can be used to describe how any particular score stands in relation to the rest of the distribution. In a normal curve, half of the scores fall above and half ...

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