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Test of Premorbid Functioning
Please visit this website for more information about the instrument: Test of Premorbid Functioning  
Supplemental: Myalgic encephalomyelitis/Chronic fatigue syndrome (ME/CFS), Sport-Related Concussion (SRC)
Short Description of Instrument
The purpose of the TOPF is to estimate preinjury intellectual level based on an individual's ability to read words that lack graphemic-phonemic correspondence (e.g., "yacht"). The TOPF consists of 70 words and takes 10 minutes to administer. The TOPF is currently marketed as a package that includes norms for the WAIS-IV and Wechsler Memory Scale-IV so the user can compare the intellectual level estimated by the TOPF with current level of intellectual function determined by the WAIS-IV. The kit also includes instructions to estimate preinjury intellectual level based on demographic features rather than reading performance.
This assessment is relevant for evaluating neurodegenerative changes during the chronic phase in athletes who have extensive exposure to a contact sport, including multiple concussions and numerous subconcussive head impacts over an extended duration.
Number of words correctly read.
The rationale for the TOPF is based on using reading to estimate preinjury intellectual level. However, this assumption might not be valid in athletes whose intellectual abilities were developmentally uneven or who had a learning disability wherein verbal skills were less developed than visuospatial ability.
Wechsler D, ed. Test of Premorbid Functioning. San Antonio, TX: The Psychological Corporation; 2009.


Document last updated April 2020
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