Factors influencing Reliability of test scores || Psychological Testing

In this video I have explained various factors that influences the reliability of test scores.
These are of two types : Extrinsic and Intrinsic Factors.
Extrinsic Factors include: Group variability, Guessing by the examinee, Environmental conditions, Momentary fluctuations in the examinee.
While Intrinsic Factors include: Length of the test, Range of the total scores, Homogeneity of items, Difficulty value of items, Discrimination value, Scorer reliability

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