Psychometric equivalence of an improved basic language morningness (BALM) Scale using industrial population within comparisons

Frederick M. Brown

Research output: Contribution to journalArticlepeer-review

69 Scopus citations

Abstract

An existing 13-item composite circadian rhythm ‘morningness’ scale was simplified into a ‘(BA)sic (L)anguage (M)orningness’ (BALM) scale at a seventh grade (12–13 years) reading level. It was given to 150 each of continuously rotating shiftworkers and fixed-schedule dayworkers in an industrial manufacturing plant. Multiple factor analyses confirmed three prior identified factors, morningness/effort, morning alert, and evening. Morningness scores for dayworkers were higher than for shiftworkers (p>;000l). The BALM scale revision is suitable for most worker levels. A suggested psychometrically ‘purer’ 9-item morningness scale omits the inconsistent evening factor scale items.

Original languageEnglish (US)
Pages (from-to)191-197
Number of pages7
JournalErgonomics
Volume36
Issue number1-3
DOIs
StatePublished - Jan 1 1993

All Science Journal Classification (ASJC) codes

  • Human Factors and Ergonomics
  • Physical Therapy, Sports Therapy and Rehabilitation

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