An MMPI comparison of polydrug and heroin abusers.

Researchers recently have resurrected the relevance of the addiction-prone personality hypothesis for explaining drug abuse by faulting previous studies for failing to control non-drug-related S background characteristics. This notion was tested by comparing MMPI clinical and content scores of 122 polydrug and 132 heroin abusers under conditions in which covariates were controlled and not controlled. The covariates age, education, socioeconomic status, and admission status interacted significantly but did not change results. Polydrug abusers consistently scored higher than heroin users on clinical scales, but differences for multivariate ANOVAs and analyses of covariance were either not significant or not large enough to be clinically meaningful. The variety of personality types found for both heroin and polydrug abusers is interpreted as refuting the notion that one personality type is addiction-prone. Contributions of personality to drug abuse remain suspected but as yet unspecified. (6 ref) (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Delayed nonmatch-to-sample performance in HIV-seropositive and HIV-seronegative polydrug abusers.

Working memory (WM) deficits are common in HIV-seropositive (HIV+) individuals and can be amplified by manipulating a variety of task parameters, such as increasing memory load or information complexity. The authors investigated the role of timing in HIV-associated WM defects by varying the amount of time required to maintain information online while holding memory load and information complexity constant. The authors studied 50 HIV+ and 35 HIV-seronegative (HIV-) polydrug abusers abstinent at testing and well-matched on demographic variables. The HIV- group outperformed the HIV+ group across all stimulus-response time delays. HIV-associated WM defects are not critically dependent on the amount of time stimulus representations must be maintained and might be attributed to impaired encoding or retrieval of stimulus representations. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

MMPI differences of black and white male polydrug abusers seeking treatment

The hypothesis that among clinical samples of substance abusers Blacks score lower than Whites on the MMPI was supported when comparing 494 White and 159 Black male veterans (mean age 28 yrs) seeking treatment for polydrug abuse. Blacks scored lower on the Depression, Hysteria, Psychopathic Deviate, and Psychasthenia scales when age, education, socioeconomic status, and intelligence were controlled. The findings do not support the notion of ethnic bias in the MMPI. Rather, the results underscore the need for identifying moderator variables that differentially interact to produce lower Black profiles among substance abusers in comparison to Whites, but higher Black profiles among psychiatric patients. (8 ref) (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Aging and reflective processes of working memory: Binding and test load deficits.

It was hypothesized that age-related deficits in episodic memory for feature combinations (e.g., B. L. Chalfonte & M. K. Johnson, 1996) signal, in part, decrements in the efficacy of reflective component processes (e.g., M. K. Johnson, 1992) that support the short-term maintenance and manipulation of information during encoding (e.g., F. I. M. Craik, R. G. Morris, & M. L. Gick, 1990; T. A. Salthouse, 1990). Consistent with this, age-related binding deficits in a working memory task were found in 2 experiments. Evidence for an age-related test load deficit was also found: Older adults had greater difficulty than young adults when tested on 2 features rather than 1, even when binding was not required. Thus, disruption of source memory in older adults may involve deficits in both encoding processes (binding deficits) and monitoring processes (difficulty accessing multiple features, evaluating them, or both). (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

The effects of housing costs on polydrug abuse patterns: A comparison of heroin, cocaine, and alcohol abusers.

This study evaluated how price of housing affects hypothetical purchasing decisions. Participants (26 heroin, 28 cocaine, and 15 alcohol abusers, and 25 controls) were exposed to 4 conditions in which they "purchased" drugs, food, housing, and entertainment. Whereas income remained constant, housing prices varied across conditions. Except for 23% of heroin abusers, participants purchased housing regardless of cost, so that income increased as housing cost decreased. Demand for food was income inelastic, whereas demand for entertainment was income elastic. Each group showed income elastic demand for their drug of choice. Hypothetical choices were reliable; drug choices were correlated with urinalysis results, and willingness to forgo housing in the simulation was correlated with time spent homeless in real life. This study shows that changes in housing prices may affect choices for drug and nondrug reinforcers. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Betrayal and revictimization: Preliminary findings.

The link between childhood sexual abuse and subsequent sexual, emotional, and physical revictimization has been widely reported. The literature is limited, however, in its exploration of the extent to which the level of betrayal inherent in a given childhood traumatic experience affects the likelihood of experiencing similar revictimization in adolescence and adulthood. This study assessed revictimization within a betrayal trauma framework among a sample of 271 college students. As predicted, individuals who reported experiencing high-betrayal trauma at any time point (childhood, adolescence, or adulthood) were more likely to report experiences of trauma high in betrayal during adolescence and adulthood. Relative risk ratios suggest that those who experience childhood trauma high in betrayal are 4.31 times more likely to be victimized in adolescence and 5.44 times more likely to be victimized in adulthood. Logistic regression analyses identified rate of childhood high-betrayal traumas and high levels of traumatic symptoms as significant predictors of high-betrayal trauma victimization in adolescence. Finally, participants’ responses to an exploratory self-report measure examining the relationship among revictimization, awareness for interpersonal betrayals, and response to betrayals in interpersonal contexts were analyzed. Preliminary findings indicate that revictimization risk may be linked to inaccurate identification of specific intimate partner betrayals and the inability to engage in proper self-protection. Suggestions for future research and clinical implications are discussed. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Aging and visual marking: Selective deficits for moving stimuli.

The selective processing of new visual information can be facilitated by the top-down inhibition of old stimuli already in the visual field, a capacity-limited process termed visual marking (D. G. Watson & G. W. Humphreys, 1997). Three experiments assessed the effects of aging on visual marking using stationary (Experiment 1) and moving (Experiments 2 and 3) items. For young participants, visual marking was observed in all experiments. For older participants, visual marking was observed only with stationary items. The results are not consistent with any simple account of general age-related decrements and provide further support for the deployment of different methods of visual marking depending on the properties of the old items and the current task demands. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Therapists' emotional reactions to substance abusers: A new questionnaire and initial findings.

Developed and tested the Ratings of Emotional Attitudes to Clients by Treaters (REACT) scale. The REACT was administered to 52 therapists and 140 cocaine-dependent outpatients, at sessions 2, 5, and 24 of psychotherapy. It was found to have high internal consistency at each time point, moderately high convergent validity with therapists' (but not patients') therapeutic alliance ratings, and a factor structure that appeared to meaningfully derive 4 factors: "therapist in conflict with self," "therapist focused on own needs," "positive connection," and "therapist in conflict with the patient." Therapists' emotional responses were found to become more negative over the course of treatment, and, when compared by theoretical orientation, were found more positive for 12-step drug counselors than for cognitive or supportive-expressive therapists. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Selective attention improves under stress: Implications for theories of social cognition.

Three influential perspectives of social cognition entail conflicting predictions regarding the selectivity of performance under stress. According to the attention view, selectivity to the task-relevant attribute improves under stress because of reduced utilization of task-irrelevant attributes. According to the capacity-resource approach, stress depletes attentional resources wherefore selectivity fails for all but chronically accessible information. A third perspective, ironic process theory, similarly holds that selective attention fails under stress but adds that task-irrelevant information is rendered hyperaccessible. The theoretical derivations were tested in a series of experiments using 2 classes of selectivity measures, with special care taken to control for hitherto neglected factors of context. The results showed that the selectivity of attention improved under stress, consistent with the prediction of the attention view. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Contingency management for accurate predictions of urinalysis test results and lack of correspondence with self-reported drug use among polydrug abusers.

Contingency management procedures have proven effective in the treatment of drug-dependent patients. These procedures, however, often require frequent urine testing, which is too costly for community treatment programs. To make urine testing procedures more cost effective, the feasibility of reinforcing accurate predictions of urine drug screen (UDS) results was evaluated. Participants made extremely accurate UDS predictions, particularly when they made drug-positive predictions, regardless of whether predictions were reinforced. However, self reports of recent drug use had poor correspondence with predictions of UDS results. Results suggested that if programs only tested samples predicted to be drug free, considerable cost savings could be incurred. Further research is needed to determine if validity would be enhanced by using a proportion of costs saved to provide nominal reinforcement when samples were verified to be drug free. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Precursors to therapist sexual misconduct: Preliminary findings.

This article presents preliminary findings on the characteristics of and predisposing factors in therapists engaging in sexual intimacies with patients. Data were derived from comprehensive evaluations, consultations, supervisions, or analytically oriented treatments. Particularly salient were frequent misunderstandings of, rationalizations about or defensive transformations of love and hate in the countertransference. Common findings involved (a) long-standing and unresolved problems with self-esteem, (b) sexualization of pregenital needs, (c) restricted awareness of fantasy, (d) covert and sanctioned boundary transgressions by a parental figure, (e) unresolved anger toward authority figures, (f) intolerance of negative transference, and (g) defensive transformation of countertransference hate into countertransference love. Coexistence of multiple levels of reality within the psychotherapeutic dyad is discussed as an area in which misunderstandings and rationalizations frequently occurred. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Selective attention deficits and subjective fatigue following traumatic brain injury.

The present study aimed to investigate the relationship between subjective fatigue and selective attention deficits following traumatic brain injury (TBI). Forty-six participants with mild-severe TBI and 46 healthy controls completed fatigue scales (Visual Analogue Scale--Fatigue, Fatigue Severity Scale [FSS] and Causes of Fatigue Questionnaire [COF]), and attentional measures including subtests from the Test of Everyday Attention, and the Complex Selective Attention Task (C-SAT). TBI participants reported greater fatigue on the FSS and COF, performed more slowly on attentional measures, and made more errors on the C-SAT. After controlling for anxiety and depression, fatigue was significantly correlated with performance only on the C-SAT. Findings suggest a relationship between subjective fatigue and impairment on tasks requiring higher order attentional processes. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Psychological responses to BRCA1 mutation testing: Preliminary findings.

The short-term psychological responses of 60 adult women tested for a BRCA1 gene mutation associated with a high risk of breast and ovarian cancer were investigated. Participants were members of a large kindred enrolled in an ongoing prospective study of the psychosocial impact of genetic testing. Initial results from participants who completed both the pretest baseline and the 1-2 week posttest follow-up interviews are reported. Gene mutation carriers manifested significantly higher levels of test-related psychological distress, as measured by the Impact of Event Scale, when compared with noncarriers. The highest levels of test-related distress were observed among mutation carriers with no history of cancer or cancer-related surgery. Although general distress (state anxiety) declined after testing, carriers were more distressed than noncarriers at follow-up. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Selective short-term memory deficits arise from impaired domain-general semantic control mechanisms.

Semantic short-term memory (STM) patients have a reduced ability to retain semantic information over brief delays but perform well on other semantic tasks; this pattern suggests damage to a dedicated buffer for semantic information. Alternatively, these difficulties may arise from mild disruption to domain-general semantic processes that have their greatest impact on demanding STM tasks. In this study, mild semantic processing impairments were demonstrated in 2 semantic STM patients. They performed well on untimed semantic tasks but were deficient in accuracy and reaction times on speeded tasks. Demanding semantic production tasks were also affected. These patients were compared with a case series of individuals with semantic aphasia whose multimodal semantic difficulties stemmed from poor cognitive control. STM and semantic performance were more impaired in this group, but there were qualitative similarities to the semantic STM patients. The difference between the 2 patient types may be a matter of degree. In semantic aphasia, severe disruption to semantic control leads to global semantic impairments, whereas in semantic STM milder disruption might impact mainly on STM tests because of the high control demands of these tasks. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Validation of the Adolescent Drug Use Screening Inventory: Preliminary findings.

Documented the validity of the Substance Use and Psychiatric Disorder scales of the newly developed Drug Use Screening Inventory (DUSI). 25 adolescents (mean age 15.6 yrs) were administered the DUSI. Results were correlated with the Kiddie Schedule for Affective Disorders and Schizophrenia (K-SADS) and Diagnostic and Statistical Manual of Mental Disorders-III-Revised (DSM-III-R) substance abuse symptoms. Significant positive correlations were observed between number of symptoms on the DSM-III—R checklist and severity scores on the Substance Use, Health Status, Psychiatric Disorder, Social Skills, Family System, School, Work, and Peer Relations scales of the DUSI. Number of psychiatric symptoms reported on the K-SADS correlated with severity scores on the Substance Use, Behavior Problems, Health Status, and Psychiatric Disorder scales of the DUSI. Drug use was also related to psychosocial disturbances in this sample of adolescents. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Effects of early focal brain injury on memory for visuospatial patterns: Selective deficits of global-local processing.

Selective deficits in visuospatial processing are present early in development among children with perinatal focal brain lesions (PL). Children with right hemisphere PL (RPL) are impaired in configural processing, while children with left hemisphere PL (LPL) are impaired in featural processing. Deficits associated with LPL are less pervasive than those observed with RPL, but this difference may reflect the structure of the tasks used for assessment. Many of the tasks used to date may place greater demands on configural processing, thus highlighting this deficit in the RPL group. This study employed a task designed to place comparable demands on configural and featural processing, providing the opportunity to obtain within-task evidence of differential deficit. Sixty-two 5- to 14-year-old children (19 RPL, 19 LPL, and 24 matched controls) reproduced from memory a series of hierarchical forms (large forms composed of small forms). Global- and local-level reproduction accuracy was scored. Controls were equally accurate on global- and local-level reproduction. Children with RPL were selectively impaired on global accuracy, and children with LPL on local accuracy, thus documenting a double dissociation in global-local processing. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Selective attention deficits in persons with autism: preliminary evidence of an inefficient attentional lens

A forced-choice reaction time (RT) task was used to assess the filtering component of selective attention in mental-age (MA) matched groups of persons with autism (n = 12), organic mental retardation (n = 32), familial mental retardation (n = 30), and no handicap (n = 34). Conditions varied with regard to the presence or absence of a window and number (zero, two or four) and location of distractors. The RTs of the persons with autism improved relative to the other groups in the presence of the window without distractors, but this effect was negated when distractors were also presented. The performance of the persons with autism was the most impaired in the presence of distractors. These findings represent preliminary behavioral evidence of an inefficient attentional lens among persons with autism.     

Single dissociation findings of ADHD deficits in vigilance but not anterior or posterior attention systems.

Following a distributed network model of visuospatial attention, the authors used an A-X version of the Continuous Performance Test and a covert orienting paradigm to examine the vigilance, anterior, and posterior attention systems. Compared with control participants without attention-deficit/hyperactivity disorder (ADHD), children with the predominantly inattentive (ADHD-I) and combined (ADHD-C) subtypes had lower sensitivity (d') to detect targets from nontargets. Children with ADHD-C, but not ADHD-I, additionally had a highly activated response style (lnβ). Performance for both subtypes decreased to a greater extent over time in a manner consistent with problems in sustained attention. Together, these results suggest the presence of vigilance system deficits in participants with both ADHD subtypes. However, consistent with previous meta-analytic work, there was no evidence for anterior or posterior system orienting dysfunctions in either subtype. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Low-level temporal coding impairments in psychosis: Preliminary findings and recommendations for further studies.

The authors investigated whether difficulties with temporal event coding, previously reported in patients with schizophrenia, are already present during first-episode psychosis (FEP). In this experiment, the subjective judgments of the simultaneity of visually presented stimuli were compared between 11 healthy controls, 9 patients with chronic schizophrenia (CSZ), and a sample of 11 FEP patients. Participants were asked to indicate whether 2 vertical bars appeared at the same time or at different times on a computer monitor. CSZ patients' thresholds were elevated, and the FEP sample showed higher thresholds relative to controls. Although preliminary, these findings indicate a generalized disturbance in event-structure coding at early stages of psychosis and question the specificity of its disturbance. Considering the proposed relationship between event-structure coding and the experience of time in general, this study recommends that future studies refocus on psychosis in general, rather than on schizophrenia as a particular case of abnormal temporal processing. In addition, it is suggested that the relevant psychopathology will be best determined by means of a comprehensive analysis of low-level temporal coding performance in different types of psychosis. (PsycINFO Database Record (c) 2011 APA, all rights reserved)