Cognitive Functions Dementia

Please note that this product can only be administered if you have a valid Vienna Test System administration software license for VTS online or a local VTS version 8.8.10 or higher.

This product requires an additional device. For more information please contact us.

Field of Application+

Detailed Description+

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.

Test administration+

Controlled Mode


The CFD test set comprises the following dimensions and tests:
DimensionsTestsTest formsDuration in min.
Total length if all dimensions are presentedapprox. 46
AlertnessWAFS1 (visual)approx. 3
Divided attentionWAFS1approx. 9
Processing speedTMT-L, Part AS1/S2approx. 1.5
Verbal long-term memory
Learning ability
Short-term delayed recall
Long-term delayed recall
AWLTS1/S2approx. 12
Executive functions
Cognitive flexibilityTMT-L, Part BS1/S2approx. 1.5
Spatial working memoryCORSIS7approx. 8
Expressive language
Verbal fluency - semanticWIWOS1/S2approx. 3
Verbal fluency - lexicalWIWOS3/S4approx. 3
Object namingWOBTS1/S2approx. 5
The following tests can be used to test other functions if required:
DimensionsTestsTest formsDuration in min.
Perceptual motor functions
VisuoconstructionVISCOS3/S4approx. 15
Resilience to fatigue
Resilience to fatigueWAF (retesting)S1 (visual)approx. 2
AlertnessWAFS1 (cross-modal)approx. 2

Products specifications
LanguagesEnglish (USA), German, Italian, Portuguese
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>, cross-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>, supervisor-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>, additional 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>, cross-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(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>