Simplified conversion of percentage agreement to phi

Hoi K. Suen, Donald Ary

Research output: Contribution to journalArticlepeer-review

2 Scopus citations


Wakefield's formula for the conversion of the percentage agreement reliability index to coefficient phi can be simplified considerably. Starting from the mathematical properties of a 2 × 2 table, an alternative and simpler formula is derived which provides a more convenient means for the conversion from one index to another. The simplified formula is proven to be mathematically equivalent to Wakefield's.

Original languageEnglish (US)
Pages (from-to)283-284
Number of pages2
JournalBehavioral Assessment
Issue number3
StatePublished - Jun 1 1984

All Science Journal Classification (ASJC) codes

  • Psychiatry and Mental health

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