# How to assess the reliability of a composite scores?

Following my earlier question here, is there a quick way (using Excel or SPSS) to ascertain/calculate the reliability of composite scores.

Reliability in this case is for me to say confidently (i.e. the ordinary not statistical meaning of this word!) that the composite score is consistently measuring the concept.

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 "that the composite score reflects the concept it is measuring" That is much closer to validity then to reliability. Perhaps you ought to rename/retag your question. – ttnphns Oct 5 '11 at 13:24 @ttnphns Thanks I have edited my question. – Adhesh Josh Oct 5 '11 at 13:35