Encyclopedia of Clinical Neuropsychology

2018 Edition
| Editors: Jeffrey S. Kreutzer, John DeLuca, Bruce Caplan

Premorbid Intelligence

  • Mike R. SchoenbergEmail author
  • Rael T. Lange
  • Ruba Rum
  • Katie Osborn
  • Donald H. Saklofske
  • Patrick Marsh
Reference work entry
DOI: https://doi.org/10.1007/978-3-319-57111-9_2140

Synonyms

Estimated premorbid intelligence; Premorbid IQ

Definition

Premorbid intelligence is an estimate of a person’s intellectual functioning prior to known or suspected onset of brain disease or dysfunction. More generally, this term is used to describe a process in neuropsychological evaluations in which an individuals’ level of neuropsychological functioning that existed prior to the onset of known or suspected neurological dysfunction is determined.

Historical Background

Establishing a premorbid level of intellectual functioning is necessary for deficit measurement, which is a central tenet for neuropsychological evaluation. Deficit measurement is the process for determining if a change in functioning has occurred that is greater than would be normally observed or is due to measurement error. This change is typically inferred as a neuropsychological deficit reflecting brain dysfunction. A common premorbid estimate of cognitive function used in deficit measurement is predicted...

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Copyright information

© Springer International Publishing AG, part of Springer Nature 2018

Authors and Affiliations

  • Mike R. Schoenberg
    • 1
    Email author
  • Rael T. Lange
    • 2
  • Ruba Rum
    • 3
  • Katie Osborn
    • 4
  • Donald H. Saklofske
    • 5
  • Patrick Marsh
    • 1
  1. 1.Department of Psychiatry and Behavioral SciencesUniversity of South Florida College of MedicineTampaUSA
  2. 2.Defense and Veterans Brain Injury CenterWalter Reed National Military Medical CenterBethesdaUSA
  3. 3.College of Medicine Psychiatry and Behavioral NeurosciencesUniversity of South FloridaTampaUSA
  4. 4.Florida School of Professional Psychology at Argosy UniversityTampaUSA
  5. 5.Department of PsychologyUniversity of Western OntarioLondonCanada