Perceptual span in schizophrenia.

Administered a forced-choice letter recognition task to assess the span of apprehension of 30 schizophrenics (good premorbid paranoids, good premorbid nonparanoids, and poor premorbid nonparanoids) and 20 controls (hospitalized nonschizophrenics and penitentiary inmates). When the task required only that 1 target letter be detected, there were no significant differences between groups. When the target was presented in conjunction with varying numbers of irrelevant "noise" letters, however, the span of schizophrenics was significantly less than that of either control group. The span of schizophrenics reached an upper limit at a small display size (4 letters) and showed no further increase. The constructs of premorbid adjustment and paranoid status bore no relationship to the deficit. Measures of the trial-to-trial variability in number of elements processed and consistency of scanning path did not differentiate schizophrenics and controls. The number of irrelevant noise letters surrounding a target was found to have no influence on detection in either group. (23 ref.) (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Meaning dimensions and male-female voice perception in schizophrenics with good and poor premorbid adjustment.

This study explored certain aspects of perceptual distortion in schizophrenia. Among schizophrenics with a good premorbid adjustment, schizophrenics with a poor premorbid adjustment, and normals, auditory perception of spoken material was compared as a function of (a) sex of voice and (b) dimensions of meaning. The Ss listened to successive presentations of a recorded spoken word, mixed with decreasing amounts of masking noise, until their recognition threshold were established. Schizophrenics with poor premorbid adjustment responding to the female voice had significantly higher thresholds than those responding to the male voice. This finding did not occur in schizophrenics with good premorbid adjustment. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Premorbid adjustment and paranoid-nonparanoid status in schizophrenia: A further investigation.

Investigated the interrelations between premorbid social competence, role orientation as expressed in symptomatology, and paranoid-nonparanoid status in 295 Veterans Administration (VA) hospital and 300 state hospital male schizophrenic patients. Among state hospital paranoid schizophrenics, paranoids had higher premorbid social competence scores (Phillips-Zigler Social Competence Index) than nonparanoids. For VA hospital schizophrenics, paranoid-nonparanoid status was unrelated to premorbid social competence. State hospital patients had lower premorbid competence scores and a higher incidence of nonparanoid diagnosis than VA hospital patients. The prevalence of a number of symptoms also differed between the 2 hospitals. The role orientation symptom pictures differed both for hospitals and for paranoid and nonparanoid status. The relationships between role orientation, paranoid-nonparanoid status, and premorbid social competence are discussed within a developmental framework. (23 ref.) (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Anxiety and avoidance behavior in schizophrenics in response to parental figures.

"Thematic productions in groups of Good and Poor premorbid schizophrenics were analyzed in terms of the relative amounts of anxiety and avoidance related to cards representing parent-child relationships. Three hypotheses were specific… . Poor premorbid patients were expected to produce more anxiety related imagery in response to the mother than the father figure, while Goods were expected to show the reverse effect; Poors were expected to be more avoidant in response to both parental figures; and the pattern of avoidance behavior between groups was expected to differ. The first two hypotheses were supported." (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Size estimation in schizophrenia as a function of censure, diagnosis, premorbid adjustment, and chronicity.

72 male schizophrenics divided in terms of chronicity, diagnosis, and premorbid adjustment estimated the size of a line embedded in different affective and neutral content. The main result was that premorbid adjustment and chronicity interacted in size-estimation performance with the good, premorbid-adjustment group exhibiting a smaller size estimation in the chronic condition than in the acute, while the poor, premorbid-adjustment group exhibited the opposite effect. Although a Premorbid Adjustment * Chronicity interaction was predicted in previous work, the specific over- or underestimation tendency found for each schizophrenic subgroup differed from those previously predicted. The differences in the present results and predictions derived from a review of the literature are discussed in terms of possible difficulties inherent in making inferences from studies which did not directly control the relevant subject dimensions. Results indicate little support for the social-censure hypothesis and suggest the greater effect of organismic variables relative to stimulus variables in predicting schizophrenic task performance. (18 ref.) (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Size estimation in schizophrenics: A review and reanalysis.

Attempts to sort out the sources of some of the inconsistent findings in terms of a detailed examination of between-studies differences in task and S variables. It is concluded that acute good premorbid schizophrenics show small but consistent size underestimation. Acute poor premorbid schizophrenics show a small but reliable tendency toward size overestimation. Paranoid schizophrenics underestimate, while nonparanoids overestimate, stimulus size. Among all schizophrenic groups the effects of drug status and relative acuteness or chronicity are at present not well specified. More research on task variables such as memory and viewing time is clearly required. A reanalysis of some previous data indicates that schizophrenics did not differ from normals in perceptual accuracy. The question of attributing differences in size estimation to a sensory process is raised. The present theories of flexibility, scanning, and redundancy do not provide complete explanations of the data. With the relevant variables more precisely identified, progress toward a more complete theory may be made. (28 ref.) (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Perceptual categorizations of love and anger cues in schizophrenics.

The 1st study identified 4 filmed scenes indicative of high love, high anger, medium love, and medium anger. The 2nd study compared 30 good premorbid schizophrenics and 30 normals on the high love and high anger scenes. They were not differentiated on the high love scene. On the high anger scene, the normals reported significantly more anger than the good premorbids. The 3rd study evaluated 48 poor premorbid schizophrenics, 48 good premorbid schizophrenics, and 48 normals on 4 scenes of high love, high anger, medium love, and medium anger. The good premorbids and the normals were not different on the high love scene, but significantly different from the poor premorbids. On the high anger scene, good and poor premorbids were significantly different from normals. (18 ref.) (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Physical anhedonia and schizophrenia.

Assessed the relation of anhedonia to schizophrenia using 69 schizophrenics and 54 psychiatric control outpatients from 3 mental health centers. In addition to indexes of schizophrenia, each S was given the Physical Anhedonia Scale, a measure of premorbidity, and a vocabulary test. Measures of chronicity and education were also included. ANOVAs indicated no significant differences in anhedonia among 4 diagnostic groups: paranoid schizophrenics, nonparanoid schizophrenics, unipolar affective psychiatric control Ss, and other psychiatric control Ss. Intercorrelations showed that anhedonia was negatively related to premorbid social status, years of education and vocabulary, but it was not significantly related to hospitalization. Data do not support the hypothesis that anhedonia is a consistent sign of schizophrenia but are compatible with the notion that anhedonia is the consequence of such liabilities as psychiatric disturbance, poor premorbid status, low educational level, and low verbal ability. (10 ref) (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Size Estimation in Schizophrenics as a Function of Stimulus-Presentation Time.

15 good premorbid paranoid acute schizophrenics, 15 poor premorbid nonparanoid acute schizophrenics, and 15 attendants, all males, estimated stimulus paranoid size after receiving (a) 10-sec. and (b) 100-msec. presentations of the standard, also (c) 10-msec. blank flashes instead of the standard. Choices were then made from a group of variable-sized stimuli. As expected, good paranoids, normals, and poor nonparanoids tended to low, intermediate, and high estimation levels, respectively. Contrary to eye-movement interpretation, patient groups differed under the 100-msec. presentation. Lowered estimation level with this presentation suggested stimulus redundancy interpretations. No differences with the blank flash ruled out a simple size-preference response bias. Equal proportions of "hits" among groups indicated that error distributions rather than error frequencies accounted for the results. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Relationship between reported and observed dominance and conflict among parents of schizophrenics.

The results of well-controlled studies indicate no significant differences among the mothers of schizophrenics and those of controls in the amount of reported dominance. However, several equally well-controlled studies demonstrate that the parents of schizophrenics behave in a more conflictual manner toward each other than is true of the parents of controls. The subjects for this study were 35 sets of Caucasian parents: 11 were parents of hospitalized poor premorbid schizophrenics, 12 were parents of hospitalized good premorbid schizophrenics, and 12 were parents of hospitalized tubercular patients (controls). The parents were asked individually whether they agreed or disagreed with the dominance and conflict items from the Parental Attitude Research Instrument. They were then asked to resolve, individually then jointly, 12 hypothetical child-rearing problems. The parental dialogues were all tape-recorded and later scored for dominance and conflict. The results suggest that parents in general are not reliable judges of dominant behavior, but appear to be better estimators of conflictual behavior. The latter finding is especially marked for the parents of controls. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Commonality of word associations and good and poor premorbid schizophrenia.

Forty poor premorbid and 32 good premorbid schizophrenics were administered the Kent-Rosanoff Word Association Test from which commonality scores were derived. No significant differences were found between these 2 groups until length of hospitalization was included in the analysis. Differences were significant only in those groups whose Ss had been hospitalized over 5 years, although a trend is apparent in the groups hospitalized between 1 and 5 years. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Preference for complexity in acute schizophrenics.

Employed a paired comparisons scaling technique to assess the preference of schizophrenics for varying quantities of information as presented in geometric forms. Both good premorbid paranoid and poor premorbid nonparanoid schizophrenics showed their greatest preference for the least complex shapes. Results are discussed in terms of H. Munsinger and W. Kessen's (see 39:2) conception of a match between preference for environmental information and input-processing capacity. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Performance of good and poor premorbid male schizophrenics as a function of paternal vs. maternal censure.

The hypothesis that interference in schizophrenic performance depends on an interaction between level of premorbid adjustment, paternal vs. maternal source of stimulation, and censuring vs. approval content was tested. 4 tape recordings were played for 80 good and 80 poor premorbid adjustment schizophrenics—father-son censure, father-son approval, mother-son censure, and mother-son approval. Performance was measured by a change from a pre- to post-Digit-Symbol test. The hypothesis was confirmed—good premorbids show interference with paternal censure and poor premorbids with maternal censure. A comparison group of 80 normals did not show this kind of interaction. (18 ref.) (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Stimulus generalization among schizophrenics and normal subjects.

Compared schizophrenic and normal groups on a stimulus generalization (SG) task and attempted to explore whether differences in SG among schizophrenics were related to the type of reinforcement applied during acquisition or to diagnostic subtype. 48 chronic poor premorbid schizophrenics and 48 normal controls reached criterion on a size discrimination task under either praise or censure conditions and then were administered an SG task. Schizophrenics showed significantly greater SG than normals, but no differences were found between the praised and censured groups or between paranoid and nonparanoid schizophrenics. (19 ref.) (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Proprioception and schizophrenia: a replication study with nonschizophrenic patient controls

In 3 experiments, weight discrimination, arm flexion discrimination, and a test of kinesthetic figural aftereffects were used to evaluate the proprioceptive functioning of 40 schizophrenic patients, 30 nonschizophrenic (psychotic and nonpsychotic) patients, and 10 normals. The additional variables of premorbid functioning and paranoia were also examined. Previous findings of a subtle proprioceptive deficit for schizophrenics in comparison with normals were replicated for nonparanoid schizophrenics of a weight-discrimination procedure and poor premorbid schizophrenics on an arm-flexion task. The kinesthetic-figural-aftereffects schizophrenic deficit previously reported by the author and E. Ebner (see record 1974-23243-001) was not replicated. Deficits in proprioception also were found for all nonschizophrenic patient groups on the weight-discrimination procedure and for poor premorbid nonschizophrenic psychotics and neurotics on the arm-flexion task. It is concluded that a deficit in proprioception is not unique to schizophrenia but appears to be related to chronicity and severity of pathology in both schizophrenic and nonschizophrenic hospitalized patients. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Child rearing attitudes of mothers and fathers as reported by schizophrenic and normal patients.

To determine the significant aspects of family background as perceived by schizophrenics, Ss were asked to think back to the time when they were 13 or 14 and answer a questionnaire on child rearing practices as they were conceived to be reflected in the attitudes of their parents at that time. The responses of schizophrenics with good and poor premorbid backgrounds were compared with each other and to GMS patients. The results indicate that there was a significant and direct relationship between level of adjustment and degree of deviance in postulated parental attitudes. Parents, in general, are perceived to be dominating rather than overprotective or rejecting. Normals and schizophrenics differ significantly in describing familial attitudes, although all seem to perceive father as dominant, mother as over-protective. From Psyc Abstracts 36:04:4JQ76G. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Schizophrenics' size estimations of thematic stimuli.

Found that relationships between premorbid adjustment, schizophrenia subtype, stimulus content, and size judgments of thematic stimuli were substantially dependent on the sequences in which stimuli were presented. Ss were 36 paranoid and 36 nonparanoid schizophrenics, and a comparison sample of 36 prisoners, matched for length of institutionalization. Individual differences in schizophrenics' size estimations were not simply related to premorbid adjustment, schizophrenic subtype, or to 2 common measures of chronicity-length of illness and length of hospitalization-while proportion of time hospitalized since 1st admission, interacting with schizophrenia subtype, was correlated with size judgments. (17 ref) (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Relation between current diagnostic criteria for schizophrenia and the dimensions of premorbid adjustment, paranoid symptomatology, and chronicity.

46 broadly defined schizophrenics were diagnosed according to 7 current diagnostic criteria for schizophrenia, and the subtyping dimensions of premorbid adjustment, paranoid symptomatology, and chronicity were assessed. Despite the minimal overlap between many of these criteria, samples selected by each of these systems were comparable in terms of the 3 subtyping dimensions. Results indicate that patients diagnosed as schizophrenic by each of these criteria were similar to schizophrenics who failed to meet those particular criteria with respect to premorbid adjustment, paranoid symptomatology, and chronicity. (39 ref) (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

A semantic differential analysis of parent-son relationships in schizophrenia.

Good and poor premorbid schizophrenics, as well as normal controls, rated words and photographs representing parental punishment, rejection, love, and affection with the semantic differential. The poor premorbid group rated the scolding and rejecting parents significantly more potent and active than did the normals. In contrast to normals, the poor premorbids tended not to discriminate between the scolding and rejecting parents and they also made the least distinction between positively and negatively toned parent-figures on the potency and activity factors. All groups made comparable ratings of the son in each scene. Although previous studies had reported systematic differences between good and poor premorbid schizophrenics in response to mother and father cues, the present investigation failed to find such differences. (PsycINFO Database Record (c) 2010 APA, all rights reserved)