Factors Which Affect Memory Span
There are a number of factors which definitely affect memory span; the effects of practically all of these factors have been investigated in statistical and experimental studies. Some of the factors are extrinsic, or present in the testing situation itself. These factors, if not carefully controlled, cause the memory span test to be statistically unreliable. Other factors are intrinsic in the individual, and it is these factors which are the basis of "true" memory span. Though numerous factors affect memory span, the test is one that shows surprisingly high reliability. Results obtained by different investigators show that the reliability coefficients for memory span are quite high.
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