Factors in the motor behavior of functional psychotics.

The author presents a continuation of a research project (see 32: 1873) which suggested that reactive inhibition developed to a greater extent in schizophrenics than normals. The initial task (depressing a key in response to the appearance of a light on a panel) was altered to permit the possibility of quicker response rates, and a group of depressives was added for comparison. The results of the follow-up study are shown to continue to support the theory re: reactive inhibition. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

High school yearbooks: A nonreactive measure of social isolation in graduates who later became schizophrenic.

The research on "social isolation" as a precipitating factor in the development of schizophrenia was reviewed, and it was pointed out that the previous measures were "reactive" in nature. The present study employed yearbook senior summaries as a nonreactive archival measure of level of high school activity. It was found that high school graduates who were later diagnosed as schizophrenic had participated in significantly fewer activities than did their normal controls. The activity level of psychoneurotics was found to fall between that of the schizophrenics and normals. The difference in overall activity level was found to be a function of the fact that patients engaged in significantly fewer "social activities." (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Vocabulary performance of short-term and long-term schizophrenics.

"The following three measures of vocabulary performance varying in sensitivity were obtained from groups of short-term schizophrenics, long-term schizophrenics, and normals equated for art and education: gesticulation (nonverbal), conventional vocabulary achievement, and level of verbal communication. No differences were found between the short-term schizophrenics and the normals of any of the measures. The long-term schizophrenics were significantly lower than normals and short-term schizophrenics on all of the measures. The decrement on gesticulation for the long-term schizophrenics was significantly less than that for the other measures." (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Evidence against the response-shift account of hyperstriatal function in the pigeon (Columba livia)

Pigeons with hyperstriatal lesions and unoperated controls were given minimal or extended side-key pretraining prior to acquisition of a position discrimination. Operated birds were impaired following extended, but not minimal, pretraining. The birds then acquired a simultaneous color discrimination with posiversals of the color discrimination, operated birds were impaired, and this was primarily due to an exaggeration of perseverative responding to the former positive stimulus. Analysis of choice latencies found no tendency towards an exaggerated "Mahut effect" in hyperstriatals and indicated that operated subjects used the same solution strategies as normals. These findings directly contradict the response-shift account of hyperstriatal function and indicate a return to the response-inhibition hypothesis.     

Motivation and performance in schizophrenia.

Schizophrenic patients and normals learned a series of motor responses to successively presented visual stimuli; the schizophrenics and normals were each divided into 2 groups, Shock and Rapport, matched on an initial test, Pattern I. The shock groups were each tested on two subsequent tasks, Patterns II and III. "The results showed a differential facilitative effect of the shock stimulation for the schizophrenic patients on Pattern III but not on Pattern II. The schizophrenic rapport group declined in efficiency from Pattern II to III, a result not seen in the shock group of patients or in either normal group. These findings were interpreted in terms of an inferred process of motivational dissipation during performance in schizophrenia." (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Short term memory for numerousness in schizophrenic young adults

The short term memory of schizophrenics for random dot patterns was examined by a delayed comparison procedure. In experiment 1, the 10 schizophrenics and 10 normals compared a fixed dot pattern (standard) with a variable dot pattern (compairson) appearing 2 or 8 seconds later and decided whether the comparison stimulus had "more" or "less" dots than the standard. Memory strength, indexed by the d' value of signal-detection theory, showed neither group difference nor decay over time. In experiment 2, the interstimulus interval was filled with an unjudged dot pattern (storage interference), and the standard stimulus followed the variable comparison stimulus (encoding difficulty). The memory strength of 17 schizophrenics and 17 normals was severely impaired, and their memory strength weakened over time, but again, no group differences were found. In both experiments, the two groups showed a strong bias (beta) in underestimating the first (to-be-remembered) stimulus. It was concluded that schizophrenics' short term perceptual memory for nonverbal stimuli remains good.     

Hypnotic susceptibility of schizophrenic patients.

Clinical lore and much of the previous literature has maintained that schizophrenics are far less susceptible to hypnosis than are normals. A few studies have reported success with hypnotizing schizophrenics, but have lacked a methodology which would permit comparison with normal Ss to be made. In this study, 26 Ss with a hospital diagnosis of schizophrenia were given the Stanford Hypnotic Susceptibility Scale—a verbatim induction technique and rating scale for which data on a normal, standardization group is available. The Ss gave results much like the normal group. Reasons for the difference between this and previous findings are discussed, including the hypothesis that previous workers found schizophrenics to be different in hypnotizability from normals because they treated them differently than they would normals. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Sleep fantasy in normal and schizophrenic persons.

Used the Dream-like Fantasy Scale of D. Foulkes to assess the bizarreness of the fantasy content from the REM and NREM sleep reports of 3 groups of Ss: 8 19-22 yr. old schizophrenic patients, 10 "normal" college students with MMPI Schizophrenia (ScK) scores above 70, and 14 college students with MMPI ScK scores below 70. It was hypothesized that hallucinatory fantasy would be confined to REM sleep least for patients, next for normals with high ScK scores, and most for normals with low ScK scores. REM fantasy was found to be significantly different between groups, with low-ScK normals scoring highest. NREM fantasy was also significantly different between groups, with high-ScK normals scoring highest. Patients who were actively hallucinating during the day showed no difference between REM and NREM fantasy scores. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Empirical test of the "levels" hypothesis with five projective techniques.

Tested the "levels" hypothesis that there is an inverse relationship between the degree of stimulus structure in a test and the level of personality impulse-control system being tapped by the test, for 20 normal and 20 psychiatric Ss. As predicted, an inverse relationship between pathology and stimulus structure over 5 tests (from low-high structure Draw-a-Person, Rorschach, TAT, Rotter Incomplete Sentence Blank, and Bender-Gestalt) was found for normals. Contrary to hypothesis, no such relationship appeared for psychiatric Ss. Other hypotheses that psychiatric Ss manifest more projection and more pathology than normals, and that there is a significant correlation between pathology and projection for every test for each group were confirmed. A new theory of projection of pathology as a function of the stimulus structure of tests is proposed. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

The performance of psychopathic individuals under conditions of positive and negative partial reinforcement.

Previous theorizing had distinguished a group of primary psychopaths (PP) from neurotic psychopaths (NP) on the basis of weakness of conscience and disregard for social law (PP) vs. a strong conscience with need to get caught and be punished (NP). The present study is an attempt to distinguish NPs from PPs with regard to their ability to profit from experience (in this instance to profit from differential reinforcement schedules in a learning situation). NPs were seen to be not too different from a control group of normals. However, PPs manifested rigidity of thinking under certain conditions of reinforcement (reward vs. punishment, immediate vs. delayed), and their performance deteriorated the greater the time between stimulus and response. The study, moreover, pointed up the lack of homogeneity in groups grossly defined as "psychopath." From Psyc Abstracts 36:04:4JJ53P. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Psychodynamic changes through systematic desensitization.

Attempted to integrate psychoanalytic theory and the data from behavior therapy, specifically systematic desensitization. It was found that snake phobics could be significantly discriminated from a group of normals on a measure of castration anxiety. Following systematic desensitization of the fear of harmless snakes, (a) 10 treated snake phobics were significantly lower on manifest anxiety than 10 nontreated snake phobics, but not as low as 10 normals; (b) treated snake phobics were significantly lower than nontreated snake phobics on a TAT measure of castration anxiety, but not as low as normals; and (c) treated snake phobics were not significantly lower than nontreated snake phobics on a Rorschach measure of castration anxiety, and both were significantly higher than normals. (20 ref.) (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Effects of weight intensity on discrimination thresholds of normals and schizophrenics.

20 male chronic schizophrenics, 12 chronic disturbed schizophrenics, and 20 normal controls were tested for upper difference limens from both a 40-gm (light) and 400-gm (heavy) standard weight. Weight discrimination thresholds were found to be significantly elevated as a function of severity of pathology in the schizophrenic groups and also at the lighter weight intensity. Both groups of schizophrenics showed significantly greater improvement than normals with the heavy weights. The less disturbed chronic schizophrenics were not significantly different from normals at the heavy intensity. The results support the hypothesis of a schizophrenic deficit in proprioceptive acuity and suggest that this deficit is the result of insufficient proprioceptive feedback. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

The enigma of "hidden" traumatic brain injury

OBJECTIVE: To examine individuals with "hidden" traumatic brain injury (TBI), defined in this study as those who sustained a blow to the head, with altered mental status, and experienced a substantial number of the cognitive, behavioral, and emotional sequelae typically associated with brain injury but did not make the causal connection between the injury and its consequences. DESIGN: Comparison of four groups of individuals matched for age, gender, years of education, and duration of loss of consciousness. SETTING: This study of hidden TBI followed the identification of 143 individuals who, within a larger study of people with TBI who live in the community, identified themselves as "nondisabled" (they were to be part of the comparison sample) but who had experienced a blow to the head that left them at minimum dazed and confused. PARTICIPANTS: 21 of these 143 individuals also reported large numbers of symptoms (eg, headaches, memory problems) associated with TBI. This group (Hidden TBI-High Symptoms group) was compared to three other matched samples: one with known TBI (Known Mild TBI group) and one with no disability (No Disability group) (both of which were drawn from the larger study), and one group of individuals who identified themselves as having no disability but who had experienced a blow to the head that resulted in a few symptoms (Head Trauma-Low Symptoms group). MAIN OUTCOME MEASURES: All study participants were administered an interview that incorporated several existing instruments documenting levels of reported symptoms, emotional well-being/distress, and vocational/social handicaps. RESULTS: The Hidden TBI-High Symptoms group was found to be similar to the Known Mild TBI group in terms of the number and types of symptoms experienced, whereas the Head Trauma-Low Symptoms group was similar in this respect to the No Disability group. The two former groups also evidenced high levels of emotional distress, whereas the two latter groups did not. However, on measures of handicap, the Hidden TBI-High Symptoms and Head Trauma-Low Symptoms groups were similar to the No Disability group and dissimilar from the Known Mild TBI group in that the last group experienced vocational handicap, in particular, whereas the other groups did not. Conclusions: We conclude that hidden TBI occurs at a nontrivial level (7% of our nondisabled sample). Also, individuals with hidden TBI (with persistent symptoms), unlike those with known mild TBI, are likely to experience emotional distress but not vocational handicap following injury.     

Selective attention, breadth of attention, and shifting attention in chronic nonparanoid schizophrenics

Compared the performance of 16 normals (hospital employees), 16 chronic schizophrenics, and 16 hospitalized alcoholics in a reaction time task with simultaneous presentation of 2 stimuli and the offset of 1 stimulus as the signal. The stimuli were either of 1 or 2 different modalities, and the signal was known or was not known to the Ss in advance. The data were analyzed according to 2 different models of attentional deficit in chronic nonparanoid schizophrenics. No empirical support could be found for W. E. Broen's (1973) model, which attributes the difficulties that chronic nonparanoid schizophrenics experience in tasks with stimuli of different sense modalities to narrowed attention. On the other hand, M. W, Kristofferson's (see PA, Vol 42:958) findings on slower attentional shifts in chronic schizophrenics could be replicated. As an extension of her work, it is shown that this slower shifting process is confined to cross-modal shifts—no differences being found between normals, chronic schizophrenics, and alcoholics in ipsimodal shifts. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Associative interference and premorbid adjustment in schizophrenia.

The effects of associative interference on the verbal learning performance of 60 male process and reactive schizophrenics and 30 normals were studied using a mixed list with high and moderate interlist interference and new learning conditions. Schizophrenics made more errors than normals in the interference conditions but not in the new learning. Reactive schizophrenics made as many errors as the process group with high interference but significantly fewer under moderate interference. Process schizophrenics gave significantly more List 1 intrusions in List 2 learning than reactives or normals. Results support predictions from the qualitative differences theory of cognitive deficit. (23 ref) (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Studies in efficiency: Semantic generalization in schizophrenia.

This study examined the hypothesis that schizophrenics would generalize a conditioned GSR response relatively more to the homonym of a CS and relatively less to the synonym than normals. The specific prediction was that the difference in the magnitude of response to synonyms and homonyms (RS - RH) would be greater for normals than for schizophrenics. The Ss were 16 normals and 16 chronic schizophrenics. The synonyms elicited a larger response than the homonyms with the majority of normal Ss. The opposite results were obtained with the schizophrenics. An analysis of variance clearly supported the hypothesized interaction between the "normal-schizophrenic" variable and generalization to synonyms and homonyms. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Preferred interpersonal distance as a function of locus of control orientation in chronic schizophrenics, nonschizophrenic patients, and normals.

Used a new instrument, the Comfortable Interpersonal Distance scale, to reassess the relationship between psychopathology and interpersonal distance. It was predicted that, since schizophrenics are more external than normals and since externality has been shown to be related to greater preferred distance from others, 20 female schizophrenics theoretically should prefer greater distance, in general, from interpersonal stimuli. 20 female nonschizophrenic patients were included as controls for the "externalizing" effects of hospitalization. Results show that schizophrenics were more external than nonschizophrenics, who were more external than 20 normals. Preferred distance from interpersonal stimuli as measured by the Comfortable Interpersonal Distance scale was greatest for schizophrenics and least for normals. Implications for future research and treatment of schizophrenic patients are discussed. (16 ref.) (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Comment on Holloway and McNally's (1987) "Effects of anxiety sensitivity on the response to hyperventilation."

W. Holloway and R. J. McNally (see record 1988-07600-001) found that normals with high scores on the Anxiety Sensitivity Index (ASI), an instrument developed to assess beliefs regarding the adverse consequences of anxiety, reported more anxiety and more frequent and intense somatic sensations following hyperventilation than did normals with low scores on the ASI. They concluded that this result provides support for the construct validity of the ASI and thus for the construct of anxiety sensitivity. Nevertheless, we argue that (a) the developers of the ASI have conflated beliefs regarding the adverse consequences of anxiety with fear of these consequences, (b) the accumulated evidence for the construct validity of the ASI is weak, and (c) Holloway and McNally's design and analyses do not permit them to exclude the more parsimonious explanation that trait anxiety accounts for their findings. Implications for research on anxiety sensitivity are discussed. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

The performance of schizophrenics on social concepts.

"A hypothesis was derived from Cameron's view of schizophrenic thinking as a product of the social disarticulation of this group, as contrasted with Goldstein's interpretation of the defect in schizophrenic thought as the result of an impairment of the abstract attitude. The hypothesis was that schizophrenics would exhibit a greater decrement relative to normals on a test of social concepts than on tests of formal concepts." The data support this hypothesis. 22 references. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Personality characteristics and sexual anomalies in males.

Exhibitionist, exclusive homosexual, bisexual, heterosexual pedophilic, homosexual pedophilic, transsexual, incestuous, multiple deviant, and control groups (N?=?479) were compared on the MMPI and the 16 PF. The following 2 hypotheses were tested: (a) Sex inversion and a preference for immature partners and/or pedophilia generally are positively related to femininity. (b) A preference for immature partners and for genital exhibitionism are positively related to the following personality characteristics: shyness, passivity, social introversion, and a lack of assertiveness. Results show some support for the hypotheses except that pedophilia was not related to femininity. An examination of each group in terms of clinically significant profiles showed that exhibitionists appear to be relatively normal while, contrary to some previous studies, pedophiles and multiple deviants showed considerable emotional disturbance as measured by these tests. (French summary) (14 ref) (PsycINFO Database Record (c) 2010 APA, all rights reserved)