High Quality Content by WIKIPEDIA articles! Executive dysfunction (or executive function deficit (EFD)), in psychology (primarily cognitive psychology, neuroscience, and clinical neuropsychology), is a disruption to the efficacy of the executive system. It can refer to both neurocognitive deficits and behavioural symptoms. Executive dysfunction is implicated in numerous psychopathologies and mental disorders, as well as short-term and long-term changes in non-clinical executive control.