A résumé of conventional neuropsychological tests for assessment of frontal lobe dysfunction is given, focusing on aspects of cognition like the ability to form sequences, abstractions and estimations. Beside these, assessment variables, qualities of behaviour and test-taking attitude are regarded to be vital for the diagnostic statement. The neuropsychological theory is compared with and related to dynamic psychology with special reference to ego functions and adaptive capacities. A possible subdivision of behaviour manifestations within the frontal lobe syndrome is hypothesized from recent neuropathological findings.