Author/s: Dean C Delis, Edith Kaplan and Joel H Kramer
Publication year: 2001
Age Range: 8 years to 89 years
Administration: Individual – Variable depending on subtest selected: full battery 90 minutes
Assess key components of executive functions within verbal and spatial modalities
With nine new stand-alone tests, the D-KEFSTM provides a comprehensive assessment of higher-level thinking and cognitive flexibility – key components of executive functioning believed to be mediated primarily by the frontal lobe.
The tests, administered as a complete set to both children and adults in 90 minutes, or individually in varying time frames, assess vital executive functions such as flexibility of thinking, inhibition, problem solving, planning, impulse control, concept formation, abstract thinking, and creativity in both verbal and spatial modalities.
Use D-KEFS TM results to:
- Assess the integrity of the frontal system of the brain
- Determine how deficits in abstract, creative thinking may impact upon an individual’s daily life
- Plan coping strategies and rehabilitation programmes tailored to each patient’s profile of executive-function strengths and weaknesses
- D-KEFS TM is the first set of standardised tests to evaluate higher-level cognitive functions in individuals as young as 8 years old
While IQ and basic achievement tests are vital for assessing certain domains of cognitive abilities, they do not provide information about what are arguably a child’s most important cognitive abilities, the capacity to engage in creative, abstract thinking. D-KEFSTM allows you to identify and then address executive function deficits in children who perform well on IQ and achievement tests.
D-KEFSTM is individually administered, and its game-like format is designed to be interesting and engaging for examinees, encouraging optimal performance without providing “right/wrong” feedback that can create frustration in some children and adults.
Two forms are available: Standard Record Forms include all nine D-KEFSTM tests, with alternate versions for three of the tests that are most susceptible to practice effects; D-KEFS TM Sorting, Verbal Fluency and 20 Questions Tests.
D-KEFS™ is correlated with the Wechsler Abbreviated Scale of Intelligence™ (WASI™) and the California Verbal Learning Test-Second Edition (CVLT-II), providing information concerning the role of intellectual ability and memory on D-KEFS™ performance.
The D-KEFS Scoring Assistant®makes generating D-KEFS score reports faster and easier.
- Record and score the nine D-KEFS subtests as a complete battery or as individual subtests
- Produce, view, and print score reports in a tabular or graphic format
- Windows XP, Vista, and Windows 7
- 100 MHz processor (166 MHz recommended) 32MB of RAM (64MB recommended)
- 2 MB video card capable of 800×600 resolution (16-bit color)
- 75 MB free hard disk space when installing The Psychological Corporation Assessment Center for the first time, 25MB of free hard disk space if The Psychological Corporation Assessment Center is installed with another product
- Internet Explorer 5.0 (if this is not installed, you will need an additional 65MB of disk space to complete the installation)
- CDROM drive, 3 1/2″ floppy drive (recommended)
Delis-Kaplan Executive Function System™ (D-KEFS™) – Research
Matthew Jones Chesters, University of East London:
The D-KEFS has 9 stand-alone tests that can be administered on their own to assess aspects of executive function. You may select the tests that you feel are appropriate for the skills that you would like to assess.
I have heard some criticisms about the clinical utility of the tool as there were not many studies reported in the original manual that cited the use of the D-KEFS with different clinical groups. What is your response to this?
Some researchers have criticised the limited clinical data presented in the original publication manual (e.g., Schmidt, 2003). In response, Delis, Kramer, Kaplan and Holdnack (2004) pointed out that much of the test development and validity data for the D-KEFS had appeared in the mainstream neuropsychology literature rather than the test manual itself, where it was available for peer review and open to scientific critique. These points are covered in more detail in the journal article.
Delis, D.C., Kramer, J.H., Kaplan, E. & Holdnack, J. (2004). Reliability and validity of the Delis-Kaplan Executive Function System: An Update. Journal of the International Neuropsychological Society, 10, 301-303.
Schmidt, M. (2003). Hit or miss? Insight into executive functions (Test Review). Journal of the International Neuropsychological Society, 9, 962–964.
The D-KEFS can be used in a wide-range of setting in which you would like to assess aspects of an individual executive function abilities. Research has looked at using the tool with people with a range of neurological conditions (e.g. epilepsy, Parkinson’s disease, multiple sclerosis), mental health difficulties (e.g. Schizophrenia), other health related difficulties (e.g. cardiac conditions, kidney disease, chronic pain) and pervasive developmental disorders (e.g. autism).
Includes manual, stimulus booklet, sorting cards (3 sets of 6 cards), 1 tower stand with 5 colour disks, 25 record forms, 25 design fluency response booklets, 25 trail making response booklet sets (each set contains 5 response booklets for the 5 trail making conditions) in a bag.
₹ 67,368.00 + tax, as applicable
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