The variety of deviations associated with schizophrenic speech can be seen to arise from a deficit in speech production, one probably related to other known deficits in schizophrenics and their relatives, such as those revealed in studies of eyetracking. Viewing schizophrenic deviations in terms of path control allows us to see an underlying unity in what appears to be a bewildering variety of ...

Schizophrenic and normal 5s (# = 230) solved concept-identification (CI) problems varying in stimulus complexity, simultaneously with either a normal or a schizophrenic stooge providing relevant or irrelevant cues. Major results were (a) CI performance was a negative function of stimulus complexity, (b) social cues from a normal stooge had greater effects on problem solving than social cues fro...

The relationship of concept formation abilities to the presence or absence of delusions in schizophrenic disorders was investigated. Twenty-six schizophrenic patients and 14 normal individuals were administered a short form of the Booklet Category Test (BCT). Patients were grouped into those with and without delusions. It was hypothesized that the delusional group would perform significantly be...

This paper explores some of the changed relationships between body and environment that occur when instruments are augmented by electronic or digital circuits. Taking Gregory Bateson’s theorisation schizophrenic (1973) as its starting point, situations in which relationship performer, body, instrument takes on increasingly separate communicational modes, meanings come to resemble ‘unlabelled me...

Abnormal prefrontal functioning plays a central role in the working memory (WM) deficits of schizophrenic patients, but the nature of the relationship between WM and prefrontal activation remains undetermined. Using two functional neuroimaging methods, we investigated the neural correlates of remembering and forgetting in schizophrenic and healthy participants. We focused on the brain activatio...

Objectives: This case study highlights the applicability of Dynamic Assessment (DA) in exploring the cognitive development and intellectual functioning of a schizophrenic foreign language learner. Methods: The general analytical framework of study to unmask the changes in the learner’s competence is Microgenesis. Results: Analysis of the findings not only supports the Vygotskian view re...

The quarter of birth of 536 schizophrenic, 1,991 neurotic and 12,085 psychiatrically normal twin pairs from the National Academy of Sciences-National Research Council Twin Registry was compared. When either all twin pairs, or only monozygotic or dizygotic twin pairs, were considered, no significant differences were found in the quarter of birth between the 3 groups. No difference in quarter of ...

The Motor-Free Visual Perception Test (MVPT) was administered to 15 chronic schizophrenic patients and 15 normal controls, ages 40 to 60, to see whether, perceptual deficits would be found on non-motor tasks. Groups significantly affected performance on the MVPT, as did occupational status. In the schizophrenic group only, efficiency of intellectual functioning was positively related to how wel...

We examined social problem solving in schizophrenia. Twenty-seven schizophrenic patients in an acute hospital, 19 patients with bipolar disease, and 17 demographically matched nonpatient controls were tested on an empirically developed problem-solving battery that assessed the ability to generate solutions to problems, the ability to evaluate the effectiveness of solutions, and the ability to i...

Most investigations of possible metabolic aberrations in childhood schizophrenia failed to demonstrate differences between schizophrenic patients and control groups. Cholinesterase activity has net been previously reported in schizophrenic children. Similar studies with adult schizophrenics have hot been consistent, despite some reports of abnormal cholinesterase activity. The present study rep...