Serial 7s

Aka: Serial 7s, Serial 3s, Spell WORLD Backwards

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II. Indications

  1. Mental State Exam
  2. Cognitive Function Testing (Intellectual Function, Executive Function)

III. Exam: Tests

  1. Serial 7s
    1. Subtract 7 from 100, then from 93, 86, 79, 72, 65, 58, 51, 44, 37, 30...
  2. Serial 3s
    1. Subtract 3 from 20, then from 17, 14, 11, 8, 5
  3. Spell WORLD Backwards
    1. Patient responds "D-L-R-O-W"

IV. Interpretation

  1. Abnormal in Executive Function disorders or difficulty with Attention and Concentration

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