Behavioral assessment is nevertheless of importance since impairments are strongly related to poor outcome. Together with the interaction of pre-morbid factors such as personality and cognitive deficits, behavioral deficits diminish independent social behavior and increase social handicap [28]. However, measuring behavior directly faces the normality issue. In analogy to Mesulam questioning the existence of standards regarding behavior [4], this raises the necessity to consider an individual’s behavior in its entirety, which includes pre-morbid functioning, interindividual and cultural differences. Finally, as an encouraging perspective, it is worth noting that behavioral disorders can benefit from neurorehabilitation: both individual and group training programs have shown successful results [29, 30].
Acknowledgements
The authors would like to thank Ian Gatfield for language editing and proofreading.
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