Constructs responsible for the theoretical basis of neuropsychology were largely formed from the convergence of various sciences. Thereafter, so that we can understand the neuropsychology, it is necessary to bear in mind a historical journey since the initial studies of the mind and brain history. Neuropsychological assessment plays a central role in neuropsychology, as it assists in the examination of certain manifestations of individual for investigation of cognitive and mental functioning. Neuropsychological assessment should cover quantitative and qualitative analysis. The quantitative results of the neuropsychological tests reflect the conceptual maturity and cognitive level of patients, however it is important to stress that many external tests variables may interfere with this performance. Thus, scores from tests, separately, provide little information about the patient s functioning; being often important to check how he or she solves a problem and why can not perform certain tasks. In order to investigate the importance of qualitative assessment in the practice of psychologists who carry out the neuropsychological assessment, a semi-structured interview was performed with 11 professionals. The semi-structured interview, in this case, aimed at comprehensive understanding of the neuropsychological assessment process in regard to the practice of each professional. Results were organized in classification principles, leading afterwards to sets of categories that, since analyzed, allowed to conclude that the importance given by neuropsychologists to the qualitative assessment is still far short of quantitative one.