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)     

Social competence as a process-reactive dimension with schizophrenics, alcoholics, and normals.

Investigated the effect of the level of social competence on the performance of a paired discrimination task involving social censure cues for groups of male hospitalized schizophrenics, alcoholics, and normals. Previous studies finding differences between process and reactive schizophrenics had not controlled for the social competence level of the normal controls. 24 Ss from each diagnostic category were divided equally among groups of low, middle, and high social competence levels. Low social competence Ss discriminated maternal censure stimuli more poorly than middle or high socially competent groups. Psychiatric diagnosis had no significant effect on performance. Results do not support the social censure theory of schizophrenia and suggest that there has been confounding between social competence level and diagnosis in previous process-reactive research. (18 ref) (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Patterns of parental childrearing and subsequent vulnerability to cognitive distu bance.

Research with normals and schizophrenics has indicated the importance of maternal childrearing control and nurturance. The 1st experiment tested whether patterns of maternal control and nurturance would relate to the son's subsequent cognitive performance under conditions involving social censure. Ss were 63 college males. Ss rating their mothers as highly controlling-low nurturant (rejecting pattern) were poorer in conceptual performance than Ss whose mothers were rated as low controlling-highly nurturant (accepting pattern). The same results were obtained when 74 males were divided into paternal childrearing pattern groups and their conceptual performance compared. It was proposed that social censure elicits responses which interfere with effective cognitive performance in Ss whose rejecting childrearing histories have mediated low self-esteem. (1 p. ref.) (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Differences in gradients of stimulus generalization as a function of psychiatric disorder.

On the basis of the "Dollard and Miller… principle that 'increasing the strength of the drive raises the entire gradient of generalization… ' [and that]… such emotional states as fear, anxiety, and guilt can acquire the properties of a drive… . The present research investigates the hypotheses that there are differences in the shape of the SG gradients among psychotic, neurotic, and control Ss… . The results indicate that (a) the psychotics showed more generalization than the nonpsychotics; (b) the neurotics showed less… than the psychotics, but did not differ from the controls; and (c) the brain-damaged Ss showed more generalization than the nonpsychotics, but they did not differ from the psychotics." (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Stimulus generalization as a function of clinical anxiety.

"It was hypothesized that the state inferred from manifest clinical symptoms of anxiety would show functionally similar motivational properties to the state of anxiety defined in terms of an implicit response that has been conditioned to situations involving noxious stimulation. It was predicted that both types of anxiety would exhibit the energizing properties of a drive and therefore elevate response gradients of generalization… . The results showed that the groups designated as high in clinical anxiety showed significantly more generalization than the low-clinical anxiety groups under the strong-shock condition. No difference was found between the 2 levels of clinical anxiety for either the weak-shock or buzzer condition." (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

The effect of "social censure" and "social approval" on the psychomotor performance of schizophrenics.

A study in the tradition of demonstrating the modifiability of the behavior of schizophrenics through information feedback, e.g., rewards, punishment, or information requality of his performance. Schizophrenics were either told nothing about their performance, i.e., reaction time (control); told they were doing poorly (verbal censure); presented with a tone indicating slowness (neutral censure); or were given approval. The patients profited (reaction times increased) from the informational feedback under both conditions of censure, significantly more than with no or "approval" feedback. Results were compared with previous findings. 15 refs. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Evaluative feedback and aspiration statements of schizophrenics and normals.

Elicited aspiration statements from 30 male schizophrenics and 30 normal adult males in 3 treatment conditions: response-contingent praise, response-contingent censure, and no evaluation. Task "performance scores" were predetermined by E and were identical for all Ss. 2 dependent measures were examined: frequency of increased aspiration statements and magnitude of aspiration changes compared with prior "performance." Response-contingent censure resulted in greater frequency of increased aspiration statements for both diagnostic groups. However, censure differentially effected the magnitude of performance-aspiration differences, with schizophrenics showing greater magnitude of response. Results support previous findings on attitudes of schizophrenics and normals toward success and failure and are congruent with theories of schizophrenic behavior emphasizing development of withdrawal patterns to avoid punishment. It is also indicated that schizophrenics' sensitivity to the aversive may be used constructively. (23 ref.) (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Failure and the subsequent performance of schizophrenics.

"The present study investigated the questions of whether deficit would obtain for schizophrenics on a timed task of nonsocial content and, if so, whether the deficit would increase or decrease over trials under a condition of nonreinforcement and, finally, differentially affect the subsequent performance of schizophrenics and normals… . The results indicated that both schizophrenics and normals responded with enhanced performance to the negative conditions, but that only the schizophrenics demonstrated enhanced performance under the positive condition." 15 references. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Stimulus generalization and schizophrenia.

Paranoid and nonparanoid schizophrenics, on and off drugs, were compared with medical inpatients for stimulus-generalization responsivity. The stimuli were lines differing in length, and the response alternatives differed in amplitude. There were no significant differences in gradients of stimulus generalization among the groups. This finding opposes Mednick's original anxiety-drive theory of schizophrenia, especially his assumption that schizophrenics overgeneralize. The finding does not oppose Mednick's amended theory. (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)     

Effect of praise and censure on the performance of schizophrenics.

Ss were 36 normals, 36 good, and 36 poor premorbid schizophrenics. Poor premorbids were shown to be primarily motivated to avoid censure and good premorbids to be relatively more sensitive to praise. It was demonstrated that when censure was used on a task with only 2 possible responses, poor premorbids performed better than good premorbids. The opposite relationship was demonstrated for the effects of praise, to which the good premorbids were more responsive. On a task with many responses, the praise or censure gave little information as to the correct response. On this task, censure was demonstrated to be relatively more disruptive to the poor premorbids than praise, but the opposite held for the good premorbids. Comparisons with neutral conditions and normal Ss were also made. (19 ref.) (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Form discrimination performance of schizophrenics as a function of social censure, premorbid adjustment, chronicity, and diagnosis.

Tested the social censure hypothesis by presenting neutral and censure stimuli to 160 male 20-60 yr. old schizophrenic-paranoid inpatients in 10 experimental subgroups. Results support previous disconfirmatory studies which found that stimulus content is a minor factor in the explanation of the schizophrenic performance deficit. The similarity in performance of schizophrenics and other comparable hospitalized groups is discussed in relation to the possible confounding processes elicited by the form discrimination task. (28 ref.) (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Praise and censure as motivating variables in the motor behavior and learning of schizophrenics.

Hullian assumptions regarding drive level were utilized to predict the performance of acute and chronic schizophrenics on learning tasks of varying complexity. Ss were exposed to 3 conditions of reinforcement: censure, praise, and neutral (neither censure nor praise), and faced with simple and complex learning tasks. Acute schizophrenics responded differently from the chronic Ss to the conditions of reinforcement. The performance of the acute group was facilitated on the 2nd task by the experience of being told they were wrong on the 1st; this was not so with the chronic schizophrenics. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Effects of social reinforcement on the level of abstraction in schizophrenics.

This study was designed to investigate (1) the effects of the nature of contingent vs. noncontingent social reinforcement upon the level of abstraction in schizophrenics as measured on a proverbs task, (2) the generalization of this behavior to another verbal conceptual task administered under neutral conditions, and (3) the predictive and construct validity of the Ullmann-Giovannoni Process-Reactive Self-Report Scale. 64 male schizophrenics were assigned to 4 treatment groups: contingent positive, noncontingent positive, contingent negative, and control. The results indicated that only the contingent positive Ss significantly increased their level of performance on the proverbs task and showed generalization. The other 3 groups showed no significant differences. Validity evidence for the Process-Reactive Scale and marital status was obtained. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

A prediction of patterns of schizophrenic error resulting from semantic generalization.

Conducted a study with 2 groups of 26 male schizophrenics and normal psychiatric aides (mean age = 45 yr) to test predictions derived from a theory of disordered thought by L. J. Chapman, J. P. Chapman, and G. A. Miller (see PA, Vol. 39:10059) concerning the conditions under which schizophrenic Ss exhibit excessive generalization errors. The theory assumes that both the schizophrenic and normal are biased toward responding to words in terms of the words' strongest aspects of meaning, but that schizophrenics are more strongly biased toward this than are normals. Ss were instructed to indicate by pressing buttons marked "yes" and "no" whether or not test words presented in serial fashion on a memory drum had appeared on a previous training list. "Yes" responses to test words not appearing on a previous training list were the measures of generalization errors. The predictions were supported by the finding that schizophrenics made significantly more errors to words on the test list that shared strong meaning responses (p     

Word meaning and sexual identification in paranoid schizophrenics and anxiety neurotics.

From psychoanalytic theory it is reasoned that the paranoid schizophrenic is one who has not made an adequate identification with the parent of like sex; other theoretical formulations presuppose a lack of identification with either parent. To test which of these hypotheses is valid, Osgood's Semantic Differential was used as a measure of identification (as established by Lazowick, 1955). It was given to a sample of hospitalized paranoid schizophrenics, an outpatient VA mental hygiene clinic sample of anxiety neurotics, and 2 control groups, hopsitalized TB patients and working people. The results indicated that the paranoid schizophrenic showed lack of identification with either parent. To some extent, this was true of the identification pattern of the neurotic group, but the latter also showed confusion of identification. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Biases in interpretation and memory in generalized social phobia.

Two experiments examined the link between interpretation and memory in individuals diagnosed with Generalized Social Phobia (GSP). In Experiment 1, GSP and control participants generated continuations for nonsocial and ambiguous social scenarios. GSP participants produced more socially anxious and negative continuations for the social scenarios than did the controls. On the subsequent test of recalling the social scenarios, intrusion errors that shared meaning with the original continuations were made more frequently by the GSP group, producing false recall with emotionally negative features. To examine whether nonanxious individuals would also produce such errors if given emotional interpretations, in Experiment 2 the authors asked university students to read the scenarios plus endings produced by GSP participants in Experiment 1. The students either constructed vivid mental images of themselves as the main characters or thought about whether the endings provided closure. Low-anxious students in the closure condition produced fewer ending-based intrusions in recalling the social scenarios than did students in the other 3 conditions. Results illustrate the importance of examining the nature of source-monitoring errors in investigations of memory biases in social anxiety. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Reducing ambiguity: semantic statistical studies of "normal" probands, neurotic patients, borderline patients and schizophrenic patients

The present study tries to answer three questions: 1.) Do patients with neurotic disorders differ from normals by a stronger tendency to avoid or reduce ambiguity? 2.) Does the tendency to avoid or reduce ambiguity increase with increasing ambiguity of the stimulus? 3.) Does the avoidance or reduction of ambiguity increase with affects of anxiety and hostility? In order to answer these questions, Ertel's dogmatism-dictionary was applied to the answers of 30 normals, 30 patients with neurotic disorders, 30 borderline-patients, 25 acute and 25 chronic schizophrenics in the Holtzman Inkblot Technique (HIT). According to the results, (1) patients with neurotic disorders do not differ from normals by a stronger tendency to avoid or reduce ambiguity. 2.) The tendency to avoid or reduce ambiguity increases with measures of increasing stimulus ambiguity of the HIT cards in all diagnostic groups studied with the exception of chronic schizophrenics. As far as response ambiguity (variability of interpretation) is concerned, only in chronic schizophrenics the tendency to avoid or reduce ambiguity decreases with increasing response ambiguity. 3.) The avoidance or reduction of ambiguity increases with affects of anxiety and/or aggression assessed by HIT-measures in all diagnostic groups studied with the exception of normals and chronic schizophrenics. In both normals and chronic schizophrenics, the reduction of ambiguity decreases significantly with increasing anxiety, in chronic schizophrenics the reduction of ambiguity decreases significantly with an increase of low levels of aggression.     

Perceptual contact with reality in schizophrenia.

"It was hypothesized that under experimental conditions involving minimal distance cues, schizophrenics in poor contact would manifest less size constancy than either schizophrenics in good contact or normals. Three groups of subjects, schizophrenics in good contact with reality, schizophrenics in poor contact, and normals, were tested in a size-constancy experiment under three different distance cue conditions, maximal, minimal, and no cue. The results of the investigation supported the hypothesis. This was interpreted as suggesting that the schizophrenic's break with reality involves not only more complex psychological functions, but basic perceptual processes as well." 20 references. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Mediated stimulus generalization and words connoting mood.

90 words connoting mood were scaled for degree of elation or depression. 70 of the words were selected as the stimuli in a study of mediated stimulus generalization. For 2 groups of men and 2 groups of women the training stimuli were extremely elated words, and for 2 different groups of men and women, the training stimuli were extremely depressed words. In each of the 2 groups for both sexes, one group was reinforced for whispering and the other for shouting. After training all groups received a generalization series consisting of words varying in degree of elation or depression. Ss trained to shout elated and whisper depressed stimuli produced steeper mediated stimulus generalization gradients than Ss trained to whisper elated and shout depressed stimuli. The Shout-Depressed group produced partially inverted gradients. The results were consistent with an asymmetrical Matching Principle: with connotative stimuli there is a strong tendency to make an intense response to an intense stimulus and a moderate tendency to make a weak response to a weak stimulus. (PsycINFO Database Record (c) 2010 APA, all rights reserved)