The difference between the observed score and what exists in reality (true score) is called:
a. homogeneity.
b. measurement error.
c. split-half reliability.
d. standard deviation.
ANS: B
Measurement error is the difference between the true score and what in reality is measured (observed score).
Homogeneity is a sameness of data with regard to a certain variable.
Split-half reliability is a process that determines the likeness of items within an instrument.
The standard deviation measures how much scores differ from the mean.
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