Physiological arousal and attention in veterans with posttraumatic stress disorder

Psychophysiological reactivity has been well documented in WWII, Korean Conflict, and Vietnam veterans with posttraumatic stress disorder (PTSD). In addition, these individuals have demonstrated cognitive impairments within the domains of attention, concentration, new learning, and memory. However, there has been no research examining the impact of physiological arousal on attention in individuals with PTSD. This study documents the level of physiological arousal and associated disruption of attentional abilities in 28 Persian Gulf War veterans (18 without PTSD or other psychopathology and 10 with PTSD). This population represents a group of combat trauma victims who experienced a relatively acute onset of PTSD, thus providing a unique opportunity to compare prior psychophysiological and cognitive results with a group of veterans who manifested a recent onset of PTSD. Results indicated relatively comparable psychophysiological reactivity and arousal between Persian Gulf War veterans with PTSD and Persian Gulf War veterans without PTSD. Furthermore, attentional processes of veterans with PTSD were not more disrupted than in comparison soldiers. Results suggest that the intensity and chronicity of the disorder may impact physiological arousal and disruption of cognitive functioning. Following Persian Gulf War veterans with PTSD over time may reveal that psychophysiological arousal becomes more pronounced with chronicity, perhaps as memory networks become strengthened and/or neuroendocrine systems become increasingly disrupted.     

Beyond organizational entry and newcomer stress: Building a self-reliant workforce

This article extends the organizational entry and newcomer stress literature by focusing on the importance of building a self-reliant workforce. It posits that newcomer socialization now and in the future requires building a workforce of self-reliant managers and employees who can function effectively in a dynamic, global workplace. This article suggests that socializing workers to be self-reliant helps employees and organizations to thrive in the uncertain economic environment that is the determining factor in the success of today's organizations. It further contends that by reducing ambiguity and increasing employability, employees are likely to suffer less distress and organizations are less likely to pay the price for distressed employees.     

Causal Attributions, Depression, and Post-Traumatic Stress Disorder in Victims of Crime

The major purpose of this study was to investigate relationships between causal attributions and symptomatology in victims of crime. Fifty-one subjects who had not been crime victims and 120 subjects who had been crime victims participated in the study and were assessed for symptoms of post-traumatic stress disorder (PTSD) and depression. Subjects also completed two attributional questionnaires. The potential differences in symptomatology among victims of a single crime, multiple crimes, and nonvictims were investigated. Results did not indicate differences in depression and PTSD based on single vs. multiple victimization, although differences between victims and nonvictims were found. Results using the Causal Dimension Scale (CDS; Peterson et al., 1982) indicated significant differences in the causal attributions of victims and nonvictims. On the Attributional Style Questionnaire (ASQ; Russell, 1982), group comparisons among nonvictims, PTSD victims, depression victims, both depression and PTSD victims, and victims with low symptoms did not yield significant results. However, regression analyses indicated that several subscales of both the CDS and ASQ were found to be moderate predictors of symptomatology. Implications for future research are discussed.     

Constraint satisfaction as a theory of sentence processing

Various problems with the constraint satisfaction model are discussed. It is argued that the empirical evidence presented in support of the model does not concern predictions of the model that diverge from those of depth-first (one analysis at a time) models. Several methodological problems are also noted. As a theory of sentence processing, the model is inadequate. It fails to account for the assignment of local structure, global structure, structure involving discontinuous dependencies, long-distance dependencies, and adjunct phrases. It makes incorrect predictions about the timing of syntactic analysis. Further, because syntactic structure is available only through activation of syntactic projections stored in the lexical entry of words, the model leaves entirely unexplained the myriad psycholinguistic findings demonstrating independence of lexical and syntactic structure (in Event Related Potential studies, code-switching, pure syntactic priming, etc). Finally, the model is not restrictive or explanatory, providing an account that largely consists ofpost hoc correlations between frequency counts or subjects ratings of sentences and processing time data for the same sentences.The present paper is an excerpt from Sentence (Re-)Analysis presented at the 1994 CUNY Conference. It was supported by NIH Grant HD18708 to Clifton and Frazier and DBS9121375 to Rayner and Frazier. I am very grateful to Chuck Clifton and to an anonymous reviewer for comments on an earlier draft of this paper.     

Effects of counsellor interpretations and client reactance on social influence and the working alliance

These two studies investigated the main and interaction effects of client reactance and counsellor interpretation discrepancy and style on counsellor social influence and the working alliance. Undergraduate students who were divided into high and low reactant pups listened to low, moderate, or high discrepancy interpretations given by counsellors who used a tentative or absolute interpretation. Contrary to the hypotheses, results showed only one interaction effect for reactance, interpretation discrepancy, and interpretation style. Low reactant participants rated the working alliance higher with tentative interpretations while high reactant participants rated it higher with absolute. High reactant participants consistently tended to perceive the counsellor less positively than low reactant participants. There were unexpected gender differences, suggesting that females saw the counselling more positively in the low discrepancy condition while males did in the moderate. The results were not supportive of an interaction among reactance, discrepancy, and style, but are in line with macro-results in the counselling and psychotherapy literature indicating the primary importance of client variables.     

Size and reliability of frequency-difference thresholds determined with operant tracking procedure

Auditory frequency discrimination thresholds have been determined by a “tracking procedure” at five frequencies and two intensity levels for a group of four cats. Intra-animal thresholds were found to be quite stable, and there was good inter-animal agreement among three of the four cats. Although quite stable, the tracking thresholds were larger than those which had been obtained using an avoidance procedure. However, because of the several differences between the tracking procedure and avoidance conditioning procedure, no conclusions can be drawn concerning the efficacy of the different types of reinforcement in determining the ultimate limit of the animals' discrimination ability.     

The role of facial masculinity/femininity in the attribution of homosexuality

This study examined whether subjects would differentially perceive male and female faces as homosexual based upon facial masculinity/femininity, and the extent to which their attitudes toward homosexuals would influence their perceptions. Sixty-eight undergraduates indicated how likely they thought it was that 6 male and 6 female faces were homosexual; they also rated the individuals on attractiveness. The present sample also completed the Index of Homophobia, the Bem Sex Role Inventory, the Attitudes Toward Women Scale, a conservatism scale, and a demographic questionnaire. The subjects assigned higher homosexuality ratings to feminine male and masculine female faces compared to their masculine and feminine counterparts, respectively. In addition, unattractive female faces received higher attribution of homosexuality ratings compared to the attractive faces; such an effect was not observed for the male photographs. Sex of subject and attitudes toward homosexuality did not significantly affect evaluations.Portions of this paper were presented at the meetings of the American Psychological Association, New Orleans, Louisiana, August 1989.     

Limbic networks and associative learning: I. Entorhinal contributions to instrumental conditioning

The hippocampal formation is a highly delineated brain structure that is believed to play a prominent role in learning and memory. The present experiment evaluated the contributions of medial and lateral perforant path input to bar press-conditioning under (a) continuous and (b) differential reinforcement of low rates of responding (DRL) schedules, and (c) shuttlebox avoidance conditioning. Bilateral deafferentation of either pathway had no effect on the acquisition of bar press responses or on performance under the DRL schedule. Deafferentation of the medial pathway facilitated acquisition of avoidance responses in a manner much like the effects seen in hippocampectomized animals. It is suggested that the medial perforant path participates in the expression of correlated patterns of neuronal discharge known to develop within the hippocampus and that this “model” serves to modulate the temporal characteristics of simple conditioned reflexes. Loss of the modulatory influence of the model may affect acquisition and extinction rates. Contributions of other hippocampal circuits are discussed in relation to established deficits. Preliminary results of this experiment were presented at the second annual convention of the American Psychological Society, Dallas, Texas, June 1990.     

Substantiating psychological injury under the federal employees' compensation act

This paper examines the administration of the Federal Employees Compensation Act by the Office of Workers' Compensation Programs (OWCP). It examines compensation claims originating at a large federal agency with a psychological component as either cause or consequence of a work-related injury. Patterns of case outcomes are noted to be similar to those in other jurisdictions, and are discussed in terms of dirticdty of proof and policy preferences. Possible anomalies in the administration of the statutes are noted. The paper describes difliculties for mental health professionals attempting to substantiate psychological injuries, and addresses ethical issues related to tension between the nature of science and the requirements of administrative systems. Knowledge regarding idormational requirements and evaluative criteria used by OWCP is necessary to effectively substantiate the work-relatedness of an injury. The paper provides guidelines concerning these requirements and criteria.