Factor analysis of the Mayo-Portland Adaptability Inventory: Structure and validity

Daryl L. Bohac, James F. Malec, Anne M. Moessner

Research output: Contribution to journalArticle

40 Citations (Scopus)

Abstract

Principal-components (PC) factor analysis of the Mayo-Portland Adaptability Inventory (MPAI) was conducted using a sample of outpatients (n = 189) with acquired brain injury (ABI) to evaluate whether outcome after ABI is multifactorial or unifactorial in nature. An eight-factor model was derived which explained 64.4% of the total variance. The eight factors were interpreted as representing Activities of Daily Living, Social Initiation, Cognition, Impaired-Self-awareness/Distress, Social Skills/Support, Independence, Visuoperceptual, and Psychiatric, respectively. Validation of the Cognition factor was supported when factor scores were correlated with various neuropsychological measures. In addition, 117 patient self-rating total scores were used to evaluate the Impaired Self-awareness/Distress factor. An inverse relationship was observed, supporting this factor's ability to capture the two-dimensional phenomena of diminished self-awareness or enhanced emotional distress. A new subscale structure is suggested, that may allow greater clinical utility in understanding how ABI manifests in patients, and may provide clinicians with a better structure for implementing treatment strategies to address specific areas of impairment and disability for specific patients. Additionally, more precise measurement of treatment outcomes may be afforded by this reorganization.

Original languageEnglish (US)
Pages (from-to)469-482
Number of pages14
JournalBrain Injury
Volume11
Issue number7
StatePublished - Jul 1997
Externally publishedYes

Fingerprint

Brain Injuries
Statistical Factor Analysis
Equipment and Supplies
Cognition
Aptitude
Activities of Daily Living
Principal Component Analysis
Psychiatry
Outpatients
Therapeutics
Social Skills

ASJC Scopus subject areas

  • Clinical Neurology

Cite this

Bohac, D. L., Malec, J. F., & Moessner, A. M. (1997). Factor analysis of the Mayo-Portland Adaptability Inventory: Structure and validity. Brain Injury, 11(7), 469-482.

Factor analysis of the Mayo-Portland Adaptability Inventory : Structure and validity. / Bohac, Daryl L.; Malec, James F.; Moessner, Anne M.

In: Brain Injury, Vol. 11, No. 7, 07.1997, p. 469-482.

Research output: Contribution to journalArticle

Bohac, DL, Malec, JF & Moessner, AM 1997, 'Factor analysis of the Mayo-Portland Adaptability Inventory: Structure and validity', Brain Injury, vol. 11, no. 7, pp. 469-482.
Bohac, Daryl L. ; Malec, James F. ; Moessner, Anne M. / Factor analysis of the Mayo-Portland Adaptability Inventory : Structure and validity. In: Brain Injury. 1997 ; Vol. 11, No. 7. pp. 469-482.
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