Cognitive Functions Dementia

Please note that this product can only be administrated if you have an online VTS Standard Subscription or a local VTS version from 8.8.10 or higher.

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The CFD Cognitive Functions Dementia test set assesses neuropsychological dimensions that are relevant for early detection of dementia and neurocognitive disorders (according to DSM-5). Cognitive impairments are the main symptoms of dementia aside from a reduced ability to master activities of daily living. With the help of the test set CFD, cognitive abilities from the neuropsychological dimension areas attention, verbal long-term memory, executive functions, expressive language as well as perceptual motor functions can be assessed. The intended test set procedure is standardised for three different versions, screening (16 min.), standard (46 min.) and long form (65 min.). The easily understood scoring offers the CFD index for a quick assessment of cognitive impairment across dimensions and provides a rapid overview of impaired and unimpaired cognitive functions. In addition, the initial and follow-up assessment can be evaluated together and presented clearly. So-called RCI (=Reliable Change Indices) examine occured changes in ability per dimension for its statistical significance and recognize a possible decrease in cognitive ability over time. The features of the test set are the possibility of presenting the entire CFD test set on a touchscreen, supervisor-supported instructions as well as norming for the 50+ age group across tests with the option for a norm adjustment. This way, the possible impacts of age, gender, and level of education on the test performance are considered automatically for this adjustment.

CFD-S1 and CFD-S2 are parallel forms which, for administrative reasons, are managed as separate products in VTS Marketplace. If you purchase test specifications for CFD-S1, you can also automatically use them for CFD-S2 or vice versa.

Please note that a calibrated touch screen is needed for displaying the CFD index as well as the dimension indices and norm adjustment. For more detailed information don't hesitate to contact us.


English (USA)





The high content validity of the CFD test set results from the close orientation of the current diagnosis guidelines for the selection of the cognitive dimensions, particularly those that are listed in the DSM-5 on neurocognitive disorders. Clinically proven research paradigms were used to assess these cognitive functions. The paradigms were evaluated in terms of publication frequency, faithfulness to concept, experience of use with dementia patient groups, validity and reliability.

The construct validity was examined based on the CFD norm sample 50+ using the structural equation model. It was possible to confirm that the individual cognitive subdimensions in the CFD test set correlate to an extent that is in accordance with the theory.

Regarding the criterion validity, different person and patient groups are examined with the CFD test set and other tests in line with a multicentric, prospective study. The analysis of the data shows that the tests of the CFD test set can differentiate reliably between dementia patients or persons with suspected dementia and parallelized, healthy persons.

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The CFD test set comprises the following dimensions and tests:
DimensionsTestsTest formsDuration in min.
Total length if all dimensions are presentedapprox. 46
AlertnessWAFS1 (visuell)ca. 3
Geteilte AufmerksamkeitWAFS1ca. 9
VerarbeitungsgeschwindigkeitTMT-L, Teil AS1/S2ca. 1.5
Verbales Langzeitgedächtnis
Subdimensionen: Kurz verzögerter Abruf Lang verzögerter Abruf WiedererkennenAWLTS1/S2ca. 12
Exekutive Funktionen
Kognitive FlexibilitätTMT-L, Teil BS1/S2ca. 1.5
Räumliches ArbeitsgedächtnisCORSIS7ca. 8
Expressive Sprache
Wortflüssigkeit - semantischWIWOS1/S2ca. 3
Wortflüssigkeit - lexikalischWIWOS3/S4ca. 3
ObjektbenennungWOBTS1/S2ca. 5
The following tests can be used to test other functions if required:
DimensionsTestsTest formsDuration in min.
Perzeptuell-motorische Funktionen
VisuokonstruktionVISCOS3/S4ca. 15
ErmüdbarkeitWAF (Re-Testung)S1 (visuell)ca. 2
AlertnessWAFS1 (crossmodal)ca. 2


  • Table with raw scores, percentile ranks and confidence intervals and an assessment of the clinically impaired dimensions by way of a simple traffic-light system (red-yellow-green) based on the DSM-5 criteria for mild/severe cognitive impairments
  • Profile
  • Written report in short and long versions with profile diagram and verbal description of the individual results. Here, too, the traffic light color scheme makes it easy to take in the results at a glance
  • Joint table comparing the initial and follow-up assessments including reliable change indices (RCI) for the case-by-case statistical assessment of changes in cognitive ability
  • CFD index for rapid assessment of cognitive impairment across dimensions
  • Dimension-specific, cross-test parameter on attention, verbal long-term memory, executive functions, language and perceptual motor functions
  • In the result editor, inputs can be added, edited or verified by listening to an optional audio recording, before scoring
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Products specifications
LanguagesEnglish (USA)
Test informationcross-test norming <i class="fas fa-info-circle tooltips test-info" data-container="body" data-placement="top" data-toggle="tooltip" title="The entire test set has been administered to a representative sample. This yields cross-test norms."></i>
Test informationsupervisor-supported testing <i class="fas fa-info-circle tooltips test-info" data-container="body" data-placement="top" data-toggle="tooltip" title="The supervisor describes the tasks verbally. A sample task is then presented. This promotes interaction between the supervisor and respondent."></i>
Test informationcross-test validation <i class="fas fa-info-circle tooltips test-info" data-container="body" data-placement="top" data-toggle="tooltip" title="The practical value of the test set has been demonstrated in at least one validation study."></i>
Test informationadditional device required <i class="fas fa-info-circle tooltips test-info" data-container="body" data-placement="top" data-toggle="tooltip" title="A SCHUHFRIED peripheral device (e.g. a Response Panel) is needed for proper administration of the test."></i>
Test informationcross-test scoring <i class="fas fa-info-circle tooltips test-info" data-container="body" data-placement="top" data-toggle="tooltip" title="In addition to the results of the individual tests or test dimensions, a cross-test score, such as a FIT score, is also reported. This enables general test performance to be rapidly interpreted."></i>
Test informationtest(s) specifically adapted for test set <i class="fas fa-info-circle tooltips test-info" data-container="body" data-placement="top" data-toggle="tooltip" title="At least one test has been adapted for administration in the test set. For example, a specifically adapted test may have been shortened to reduce the overall testing time. The psychometric properties of all adaptations have been investigated and confirmed."></i>