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COGBAT Cognitive Basic Assessment

S. Aschenbrenner, S. Kaiser, U. Pfüller, D. Roesch-Ely & M. Weisbrod


The COGBAT Cognitive Basic Assessment test set measures neuropsychological dimensions that are relevant to many different patient groups.
It is used to clarify the cognitive status of patients with neurological and/or psychiatric disorders. COGBAT is used with individuals with psychiatric disorders or organic diseases. However, it is also used with individuals who are undergoing treatment that might impair cognition and with individuals with post-operative cognitive dysfunction. The aim is to assess cognitive status as comprehensively (broadly) as possible but also in a manner that is as economical as possible in terms of time. Using carefully selected and in some cases specially adapted tests, the test set measures subdimensions in the areas of attention, memory and executive functions. COGBAT thus identifies cognitive areas in which a deficit may be present and follow-up assessments enable a comparison between two test sessions (e.g. when evaluating an intervention). Thus the test set is available in two parallel test forms (S1 and S2). Significant areas can then be investigated in depth with specific tests.
An easily understood evaluation provides a rapid overview of impaired and unimpaired dimensions. COGBAT is often used in situations in which for reasons of time neuropsychological testing has not in the past been carried out routinely, or when specific neuropsychological expertise is unavailable. For example, it is of use in outpatient psychotherapy practices, neurological, psychosomatic and cardiac rehabilitation centers, psychiatric clinics, day centers and hospital outpatient clinics. The focus is often on the possibility of reintegration to work.
A special feature of COGBAT is the global norming, which enables an individual’s results to be compared with those of a representative sample over all age groups (adolescence and adults).


The dimensions of the test set were selected in a multi-stage process. First, a shortlist of relevant cognitive dimensions was drawn up by the authors from the current literature. This shortlist was submitted to various experts for discussion and to obtain their opinion. In parallel with the selection of dimensions, a comprehensive literature search was carried out to identify up-to-date and clinically proven test paradigms. The paradigms were evaluated in terms of time efficiency, publication frequency, faithfulness to concept, experience of use with neurological and psychiatric patient groups, validity and reliability. Construct validity was evidenced through confirmatory factor analysis. Subsequent multicentric studies showed that the test, which is economical in terms of both time and resources, identifies significant differences between healthy subjects and depressive or schizophrenic individuals.


  • COGBAT index: rapid assessment of general cognitive impairment across dimensions.
  • Dimension-specific indices: Dimension-specific parameter of cognitive impairment is highly relevant for differential diagnosis and/or further treatment (e.g. cognitive training).
  • Table of raw scores, percentile ranks and confidence intervals and rating of relevant dimensions using a simple color scheme (traffic-light system: red-yellow-green).
  • 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 showing the initial and follow-up assessment including reliable change indices (RCI) for the case-by-case statistical assessment of changes in cognitive ability


The COGBAT test set comprises the following dimensions and tests:
Dimensions Tests Testform/Subtests Duration in minutes
Total length if all dimensions are presented approx. 53
Alertness, visual WAF S1 approx. 2
Divided attention WAF S1 approx. 6
Processing speed TMT-L S1/ Part A approx. 1
Subdimension: Learning ability Subdimension: Short-term recall Subdimension: Long-term recall Subdimension: Recognition FGT S11 approx. 14
Executive functions
Cognitive flexibility TMT-L S1/ Part B approx. 1
Planning ability TOL-F S1 approx. 16
Working Memory, verbal NBV S1 approx. 9
Additional information
Response Inhibition INHIB S13 approx. 4
The following tests can be used to test other functions if required:
Dimensions Tests Testform/Subtests Duration in minutes
approx. 13
Mouse use MOUSE S1 approx. 2
Neglect/visual field WAF S1 approx. 6
Subjectively experienced mental ability FLEI S1 approx. 5

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Test information

cross-test scoring
cross-test norming
cross-test validation
based on statutory requirements
test(s) specifically adapted for test set
additional device required
supervisor-supported testing