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+
Staff & Management Assessments
Job & Career Placement
Safety & Security Assessment
Academic Testing
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.
The test set is also available in two parallel forms (S1 and S2). Correspondingly, the test set makes it possible to measure changes in the psychological ability of patients over time by allowing for follow-up assessments and comparisons across two test occasions.
For administrative reasons, CFD-S1 and CFD-S2 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.
Languages+
Validation+
The high content validity of the CFD test set results from its close alignment with 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 50+ CFD norm sample 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 groups of individuals are being examined with the CFD test set and other tests as part of a multicentric, prospective study. An analysis of the collected data shows that the CFD test set can reliably distinguish between dementia patients or persons with suspected dementia on the one hand and parallelized, healthy persons on the other.
Test administration+
Dimensions+
The CFD test set comprises the following dimensions and tests:
| Dimensions | Tests | Test forms | Duration in min. |
| Total length if all dimensions are presented | approx. 46 |
| Attention |
| Alertness, intrinsic (visual) | WAF | S1 | approx. 3 |
| Divided attention, cross-modal (visual/auditory) | WAF | S1 | approx. 9 |
| Processing speed | TMT-L | S1/S2, Part A | approx. 1 |
| Verbal long-term memory |
Subdimensions:
Short-term delayed recall
Long-term delayed recall
Recognition | AWLT | S1/S2 | approx. 12 |
| Executive functions |
| Cognitive flexibility | TMT-L | S1/S2, Part B | approx. 1.5 |
| Working memory, spatial | CORSI | S7 | approx. 8 |
| Expressive language |
| Verbal fluency - semantic | WIWO | S1/S2 | approx. 3 |
| Verbal fluency - lexical | WIWO | S3/S4 | approx. 4 |
| Object naming | WOBT | S1/S2 | approx. 5 |
The following tests can be used to test other functions if required:
| Dimensions | Tests | Test forms | Duration in min. |
| | |
| Perceptual motor functions |
| Visuoconstruction | VISCO | S3/S4 | approx. 15 |
| Resilience to fatigue |
| Alertness, intrinsic (visual) | WAF (retesting) | S1 | approx. 2 |
| Attention |
| Alertness, cross-modal phasic (visual) | WAF | S1 | approx. 2 |
