Thermometer and Neurocognitive Tests

Overall, it is important to be able to present the instrument (MATRICS battery) as a different question from the presence or absence of a deficit. That is, if the instruments are inadequate, there might still be a deficit in attention, etc. The instruments perform adequately and in most of the conventional measurement dimensions: reliability, validity, […]

Chronology of our Approach to Neurocognitive Batteries

Initially, Paul Grant and I noted that the apparent decrements on neurocognitive tests (attention, recall, flexibility, and social cognition) did not correspond to the symptomatology of schizophrenia. Since it had already been established that poor performance on the tests did not correlate with positive symptoms, then we had to explain the fact that the test […]

Hypothetical Construct: An Integrative Neurocognitive Deficit

I am proposing that individuals with both positive and negative symptoms have some neurocognitive deficit, which is expressed when the individuals are under stress. The usual types of stressors, such as interpersonal problems, threaten to produce overstimulation, which is stressful and leads the individual to cope with this stressor in some way. The usual strategy […]

The Empirical and Clinical Utility of Neurocognitive Tests

The skills that are measured in the Gur Battery include very discrete, elemental functions: attention, recall, memory, etc. Actually, the individual does not operate in terms of discrete functions, but the actions are generally a synthesis of integrated functions. The usual level of functioning involves broader superordinate functions, such as problem solving, concept formation, application […]

Neurocognitive Deficits, Social Stimulation, and Defeatist Beliefs

Several articles have now demonstrated that the neurocognitive deficits are not causally related to negative symptoms (Hughes et al, 2002; Bell & Mishara, 2006; Harvey et al, 2006; Möller, 2007). Thus, neurocognitive deficits cannot account for the negative symptoms. However, as has been demonstrated, defeatist attitudes do lead to both cognitive impairment and negative symptoms. […]

Motivation and Neurocognitive Impairment

Effective motivation is dependent on the perception of adequate resources. When availability of resources shuts down—or the perception of such—then, the motivation or drive to complete a challenging task becomes attenuated. The performance on the cognitive task is influenced by stress or by stimulation. When the task is not meaningful and is not accompanied by […]

Motivation Incentives in Neurocognitive Functioning

Consider the following case example. An individual sitsout in the corner, mumbles to himself. When approached by a member of the staff, his speech is minimal, usually one or two words. His speech is also jerky and not fluent. Observe this patient an hour later, while he is participating in a birthday party.He is singing […]

Is Schizophrenia a Neurocognitive Disorder? A Look at Conflicting Evidence

In recent years, there is been increasing attention among schizophrenia researchers on developing and refining tools for measuring basic neurocognitive functions, such as attention, memory, and executive function. Measurement of the functions is based on stimuli generated by the computer. Given that there is a significant correlation between performance on these computer generated tasks and […]