Reliability of Selection Measures. Reliability Defined. The degree of dependability, consistency, or stability of scores on measures used in selection. Error of Measurement . Obtained Score True Score Error Score. Errors of Measurement.
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Reliability of Selection Measures
The degree of dependability,
consistency, or stability of
scores on measures used in
-Physical characteristics = Higher reliability (HR)
-Psychological attributes = Lower reliability (LR)
error = LR
Error = HR
Selecting a method:
Same measure is used to
collect data from the same
person at two different times
Test-Retest – Sources of error
Parallel or Equivalent Forms
Does not use the same measure
twice but will instead use
equivalent versions of the measure
Internal Consistency Estimates
How similar are different parts of the measure (e.g. different questions on a test) in what they measure?