SEARCH · PubMed Health

Results for “Generalization, Psychological”

Explore indexed PubMed citations for clinical trials, systematic reviews and public health research. Read source abstracts and follow each citation to its original PubMed record.

Quote a phrase for an exact phrase match. Source license links do not imply unrestricted reuse.

At least 685 records · Page 38Linked to original sources

PubMed2006

Dissociating task-set selection from task-set inhibition in the prefrontal cortex.

Patients with focal lesions in the left (n=7) and right (n=4) prefrontal cortex were compared with controls (n=16) in a task-switching experiment using four different, simple spatial tasks. Each of these tasks involved a left-right decision, either regarding an arrow, the word "left" or "right," a circle position, or the direction of a moving line. We compared performance on trials that required rule switches versus rule repetitions (local switch costs) and we compared performance between blocks with bivalent stimuli (two dimensions present) and blocks with univalent stimuli (only one dimension present) to assess global switch costs. Patients with left prefrontal lesions, but not patients with right prefrontal lesions, exhibited increased costs on trials in which the relevant dimension switched (local switch costs), but also on no-switch trials with bivalent stimuli (global costs). We also assessed task-set inhibition in the form of the backward-inhibition effect [increased response times to recently abandoned tasks; Mayr, U., & Keele, S. Changing internal constraints on action: The role of backward inhibition. Journal of Experimental Psychology: General, 129, 4-26, 2000]. Although left frontal patients showed normal inhibition, right frontal patients showed no evidence for inhibition. These results suggest a neurocognitive dissociation between task-set selection and inhibition.

Acoustic Stimulation↗

PubMed2006

The neural basis of perceptual hypothesis generation and testing.

Four-dot masking is a new form of visual masking that does not involve local contour interactions or spatial superimposition of the target stimulus and the mask (as, e.g., in pattern or metacontrast masking). Rather, the effective masking mechanism is based on object substitution. Object substitution masking occurs when low-level visual information representations are altered before target identification through iterative interaction with high-level visual processing stages has been completed. Interestingly, object substitution interacts with attention processes: Strong masking effects are observed when attentional orientation toward the target location is delayed. In contrast, no masking occurs when attention can be rapidly shifted to and engaged onto the target location. We investigated the neural basis of object substitution masking by studying the interaction of spatial attention and masking processes using functional magnetic resonance imaging. Behavioral data indicated a two-way interaction between the factors Spatial Attention (valid vs. invalid cueing) and Masking (four-dot vs. pattern masking). As expected, spatial attention improved performance more strongly during object substitution masking. Functional correlates of this interaction were found in the primary visual cortex, higher visual areas, and left intraparietal sulcus. A region-of-interest analysis in these areas revealed that the largest blood oxygenation level-dependent signal changes occurred during effective four-dot masking. In contrast, the weakest signal changes in these areas were observed when target visibility was highest. The data suggest that these areas represent an object substitution network dedicated to the generation and testing of a perceptual hypotheses as described by the object substitution theory of masking of Di-Lollo et al. [Competition for consciousness among visual events: The psychophysics of reentrant visual processes. Journal of Experimental Psychology: General, 129, 481-507, 2000].

Adult↗

PubMed2006

Common-onset visual masking in infancy: behavioral and electrophysiological evidence.

Common-onset visual masking (COVM) occurs when a mask and a target have common onset but delayed offset, with the mask persisting beyond the duration of the target [Di Lollo, V., Enns, J. T., & Rensink, R. A. Competition for consciousness among visual events: The psychophysics of reentrant visual events. Journal of Experimental Psychology: General, 129, 481-507, 2000]. We report the first behavioral and electrophysiological evidence of COVM in infants. An initial behavioral study included a familiarization phase during which a visual pattern (the target) surrounded by four black dots (the mask) was flashed 15 times to the infant. In the "unmasked" condition, the mask disappeared with the target. In the "masked" condition, the mask remained on the screen after deletion of the target for a further 93 msec. During the test phase, the familiar target pattern was paired with a new pattern. Infants in the unmasked condition showed a significant familiarity preference, suggesting that they had encoded the target during familiarization, whereas those in the masked condition showed no preference, suggesting that they had not encoded the target during familiarization. In the second experiment, high-density event-related potentials were used to investigate the electrophysiological pattern of activity that accompanies COVM. Six-month-old infants viewed both masked and unmasked conditions. Electrophysiological data indicated that over posterior channels the masked condition elicited a larger amplitude positive wave around 300 msec after stimulus onset than trials in the unmasked condition.

Attention↗

PubMed1992

Symptom responses of female Vietnam veterans to Operation Desert Storm.

OBJECTIVE: This study examined the status of symptoms of posttraumatic stress disorder (PTSD) in a cohort of women after the onset of Operation Desert Storm. METHOD: Seventy-six non-treatment-seeking Vietnam veterans were obtained from lists of those who recently had participated in other research projects conducted at the National Center for Post-Traumatic Stress Disorder. Before the onset of Operation Desert Storm, subjects had completed a set of psychometrically valid instruments measuring general psychological symptoms and PTSD symptoms (e.g., SCL-90-R, Mississippi Scale for Combat-Related Posttraumatic Stress Disorder). On the basis of the latter scale, subjects were divided into groups with and without PTSD symptoms. At the height of the military conflict, subjects were recontacted and asked to complete the SCL-90-R and the Veterans Update Form, a measure assessing changes in PTSD symptoms. RESULTS: Multivariate analyses indicated that while most female Vietnam veterans experienced some intensification of stress-related symptoms during Operation Desert Storm, those who had previously reported high levels of PTSD were significantly more susceptible to greater distress. CONCLUSIONS: Results of this survey indicate that female Vietnam veterans with prior wartime exposure are an at-risk population for the intensification of stress symptoms after the recurrence of a military conflict.

Adult↗

PubMed1993

Comparison of cognitive-behavioral and supportive-expressive therapy for bulimia nervosa.

OBJECTIVE: The authors compared the effectiveness of 4 months (18 sessions) of cognitive-behavioral and supportive-expressive therapy for bulimia. METHOD: Sixty patients obtained from clinical referrals to an eating disorders program who met modified DSM-III-R criteria for bulimia nervosa were randomly assigned to the two conditions. Treatments were delivered in an individual format, on an outpatient basis, by experienced therapists using treatment manuals. The primary outcome measures were self-induced vomiting, binge eating, and attitudes toward body weight and shape, which were assessed by self-report and structured interview. RESULTS: Fifty patients completed treatment, 25 in each condition. Both treatments led to significant improvements in specific eating disorder symptoms and in psychosocial disturbances. Supportive-expressive therapy was just as effective as cognitive-behavioral therapy in reducing binge eating. Where treatment differences were found, they favored cognitive-behavioral therapy. Cognitive-behavioral therapy was marginally superior in reducing the frequency of self-induced vomiting; 36% of the patients who received cognitive-behavioral therapy and 12% of those who received supportive-expressive therapy abstained from vomiting in the last month of treatment. Cognitive-behavioral therapy was significantly more effective in ameloriating disturbed attitudes toward eating and weight, depression, poor self-esteem, general psychological distress, and certain personality traits. CONCLUSIONS: These results moderately favor cognitive-behavioral therapy over supportive-expressive therapy for bulimia nervosa, but follow-up is required to determine the durability of outcome with both modalities. The findings must be interpreted with caution since the selected clinical sample in this study may not represent the bulimia nervosa population.

Adolescent↗

PubMed2005

Predicting posttraumatic stress symptoms from pretraumatic risk factors: a 2-year prospective follow-up study in firefighters.

OBJECTIVE: Most studies focusing on risk factors for posttraumatic stress disorder (PTSD) have used retrospective study designs. Only a small number of studies have prospectively examined risk factors in the immediate aftermath of trauma exposure in predicting PTSD symptoms. The purpose of this study was to identify predictive risk factors for posttraumatic stress symptoms and comorbid psychopathological symptoms present during the time before exposure to traumatic stress in a high-risk population. METHOD: Forty-three professional firefighters were assessed immediately after basic training (baseline) and at 6, 9, 12, and 24 months after entry into firefighter service. Subjects were screened for psychopathological symptoms, including symptoms of PTSD, depression, and anxiety. Subjects were also characterized with regard to personality traits such as self-efficacy, hostility, and alexithymia. Neuroendocrine activity was assessed by examination of awakening and diurnal salivary cortisol profiles and 24-hour urinary catecholamine excretion. Multiple linear regression analysis was used to analyze posttraumatic stress symptoms at 24-month follow-up as a function of pretraumatic characteristics. RESULTS: A high level of hostility and a low level of self-efficacy at baseline accounted for 42% of the variance in posttraumatic stress symptoms after 2 years. Subjects who had both risk factors at baseline showed a significant increase in measures of PTSD symptoms, depression, anxiety, general psychological morbidity, global symptom severity, and alexithymia during the 2-year period. Biological characteristics were not predictive of the development of psychopathological symptoms. CONCLUSIONS: These results suggest that specific personality traits may constitute markers of vulnerability to the development of psychopathological symptoms after trauma exposure. Early identification of preexisting risk factors is needed to provide effective prevention and intervention for individuals who are at risk of developing trauma-related disorders.

Adult↗

PubMed1999

Otalgia and aversive symptoms in temporomandibular disorders.

The term Costen's syndrome has been used in the dentomedical literature to describe a constellation of craniofacial symptoms. Since some of the same complaints have been reported in patients with "generalized" psychological distress, symptoms associated with the syndrome may not be useful in differential diagnosis of temporomandibular disorders. The present study investigated whether some somatic complaints, particularly tinnitus and dizziness, were pathognomonic in patients with chronic temporomandibular pain. Illness behavior and personality factors were studied for possible interrelationships with these symptoms. Factor analysis revealed that tinnitus and dizziness loaded on separate factors. Tinnitus loaded with nasal stuffiness, tearing, and itching of the eyelids and nose, while dizziness loaded with complaints of altered taste and smell and blurred vision. Neither was consistently related to measures of pain or to indices of illness behavior or somatic focus.

Adult↗

PubMed1999

Age of onset of dental anxiety.

Little attention has been given to the issue of the age of onset of dental anxiety, even though it may have a bearing on the origins of this type of fear. This study aimed to identify the age of onset of dental anxiety and to identify differences by age of onset with respect to potential etiological factors, such as negative dental experiences, family history of dental anxiety, and general psychological states. Data were collected by means of two mail surveys of a random sample of the adult population. Of 1420 subjects returning questionnaires, 16.4% were dentally anxious. Half, 50.9%, reported onset in childhood, 22.0% in adolescence, and 27.1% in adulthood. Logistic regression analyses indicated that negative dental experiences were predictive of dental fear regardless of age of onset. A family history of dental anxiety was predictive of child onset only. Adolescent-onset subjects were characterized by trait anxiety and adult-onset subjects by multiple severe fears and symptoms indicative of psychiatric problems. The three groups were similar in terms of their physiological, cognitive, and behavioral responses to dental treatment. However, adolescent- and adult-onset subjects were more hostile toward and less trusting of dentists. These results indicate that child-onset subjects were more likely to fall into the exogenous etiological category suggested by Weiner and Sheehan (1990), while adult-onset subjects were more likely to fall into the endogenous category.

Adolescent↗

PubMed1993

Viewing human remains following disaster: helpful or harmful?

Seventy-four bereaved of the Zeebrugge Disaster completed symptom measures some 30 months following the tragedy. The group was divided into those who viewed or did not view the body and according to time of recovery, i.e. the first night, the following weeks, at the time of righting of the ship, and subsequently. For the two main groups, where body recovery was made on the first night or on the righting of the ship, intrusive and avoidant symptomatology were lower in those who viewed, but general psychological symptoms and measures of bereavement were not affected. The implications of the findings are discussed in relation to post-disaster management.

Adaptation, Psychological↗

PubMed1998

Fear of intimacy and attachment among rape survivors.

The purpose of the present study was to investigate attachment and fear of intimacy among rape survivors. As previous research has documented that several domains of functioning are affected by the experience of rape, it was hypothesized that the survivors may have difficulties with attachment and intimacy. Subjects were selected from an undergraduate general psychology class on the basis of responses to a questionnaire on sexual experiences. All of the subjects were female and included 44 rape survivors and 57 controls. As predicted, rape survivors reported greater fear surrounding intimacy. Survivors also differed from the controls on all of the attachment dimensions. They reported less confidence in others' dependability, less comfort with closeness, and more fear of abandonment. Trait anxiety was also controlled in the analyses, and except for fear of abandonment, it attenuated the differences between the groups such that they were no longer significantly different.

Adolescent↗

PubMed2002

Shame and guilt in child sexual offenders.

In this article, the authors build on previous discussions of the possible role of shame and guilt in sexual offending. They review the general psychological literature on shame and guilt and conclude that the distinction between internal and external shame is an important one in considering sexual offenders. The effects of shame and guilt on victim empathy and relapse are discussed, and it is proposed that the phenomena of shame and guilt have implications for treatment beyond those identified in previous studies. Shame is a salient feature in the initial presentation of many sexual offenders against children. Furthermore, aspects of the treatment of sexual offenders can be characterized as a shift from shame toward guilt. Implications of shame and guilt for treatment of sexual offenders are described.

Adult↗

PubMed1975

Identical twins concordant for anorexia nervosa. A preliminary case report.

This case described the symptoms of anorexia nervosa occurring in identical twins. The problems of twinship, especially the failure to establish separate identities, complicated the more general psychological issues facing these adolescents in a disturbed family. In therapy the core issues of the anorexic patient persist--disturbance of body image, misinterpretation of body stimuli and a sense of ineffectiveness. Up to now therapy seems to have improved family function, making it easier for them to coexist and decreasing the feelings of hostility and negativism felt between the parents and the twins. Eating behaviour presently focuses on the twins' need to have equal amounts of food but less emphasis is placed on the food as an area of conflict for the family.

Adolescent↗

PubMed1981

Body image in anorexia nervosa.

Despite much recent interest in the objective measurement of body image in anorexia nervosa, many questions remain regarding basic mechanisms responsible for the findings as well as their meaning in the disorder. It is unclear if "whole body" measures assess the same underlying phenomena as the "body part" method, and it is unclear if body image disturbances are etiologic or a byproduct of anorexia nervosa. The possible association between self-esteem and body satisfaction and the relationship of the latter variable to actual size estimation supports the hypothesis that size perception may be closely tied to satisfaction with non-physical aspects of self. Finally it must be determined if overestimation is a function of a general psychological disturbance or of a deficit of specific interest in this disorder. Despite these questions, the way in which anorexic patients see themselves as well as the cognitive and affective responses to this perception remains an interesting and potentially fruitful area of study with this disorder.

Adolescent↗

PubMed1984

Grief reactions to perinatal death--a follow-up study.

Thirty mothers who experienced a perinatal death were offered crisis intervention aimed at facilitating their grief process at a few days, 3 weeks and 3 months after the loss. Evaluation of maternal grief reactions and their general psychological adjustment took place at these 3 early contacts and 1 to 2 years later. This last assessment included a semi-structured clinical interview and a number of self-rating scales (Life Events Schedule, Beck Depression Inventory (BDI) and a Mourning Scale). Six of the 30 mothers showed inappropriate grief reactions at the 3 week and 3 month assessment. By the long term follow up only 1 of these 6 displayed depression or other psychiatric disorder. Three other women not identified as high risk candidates by the 3 month evaluation developed high BDI scores and clinical depressions at the 1 to 2 year assessment. Variables associated with abnormal grief and depression such as social support systems, communication between the parents, maternal dreams, and hospital practices were examined and discussed indicating possibilities for future research.

Death↗

PubMed1991

The impact of supervised exercise on the psychological well-being and health status of older veterans.

This study examined the impact of supervised exercise on the health status (measured by the Sickness Impact Profile [SIP]) and well-being (measured by the Psychological General Well-Being Index [PGWB]) of a sample of 43 elderly veterans. The intervention consisted of 90 minutes of exercise, 3 days per week at 70% of maximal capacity. Twenty-three (53%) participants completed a 1-year follow-up. The mean PGWB score increased significantly from 83.0 +/- 15.8 to 89.4 +/- 8.9 (p = .01). Cardiovascular fitness (measured by treadmill performance) increased significantly (p = .004). Baseline SIP scores were low (little dysfunction) and changed little. The study suggests that small but significant improvements in well-being accompany physiological benefits that the elderly experience with exercise.

Aged↗

PubMed2005

Civilian PTSD scales: relationships with trait characteristics and everyday distress.

Strong associations between civilian posttraumatic stress disorder (PTSD) scales and measures of general psychological distress suggest that the scales are nonspecific to PTSD. Three common PTSD scales were administered to 122 undergraduates who had experienced an emotionally salient, nontraumatic event: a college examination. Results indicated that normal levels of anxiety associated with the examination were positively correlated with scores on the Impact of Event Scale-Revised, Revised Civilian Mississippi Scale, and PTSD Checklist-Civilian Version. Multiple regression analyses indicated that substantial variance in the PTSD scales was accounted for by trait characteristics such as negative and positive affectivity and affect intensity (R2 .29 to .53). Negative affectivity correlated as highly with PTSD measures (r = .46 to .71) as those measures correlated with each other (r = .48 to .65). A high proportion of participants exceeded clinical cutoffs on these measures. The findings suggest that these PTSD scales may be overly sensitive to nontraumatic stressors such as everyday distress and trait characteristics.

Adolescent↗

PubMed1994

Assessment of Adolescents With the Rorschach: A Critical Review

This paper critically reviews 48 studies which examine the use of the Rorschach in adolescent populations. Several methodological concerns present in this literature are addressed, including (a) small sample sizes, (b) wide age ranges within the samples, (c) limited generalizability due to narrowly defined constructs and examination of highly specific groups, (d) frequent reliance on recorded diagnosis to determine group membership, and (e) limited comparability across studies due to the use of highly variable scoring and interpretation systems. In spite of these difficulties, there is some evidence that the Rorschach does provide useful and valid measures of reality testing, cognitive complexity, and disordered/psychotic thinking; general psychological distress; disturbance in object relations; and depression in specific adolescent groups. Clinical implications and directions for future research are discussed.

Journal Article↗

PubMed2004

The etiology of risk: a preliminary model.

The purpose of this paper is to describe an approach that links risk-assessment and theory-directed research. Here we describe a theoretical underpinning to current notions of dynamic risk assessment. The paper has two facets. First, the reframing of a number of concepts such as (i). Stable dynamic factors that we note would be better described as traits and hence have a grounding in the extant general psychological literature on trait theory, (ii). Static risk factors that can be viewed as historical markers of the same underlying psychological dispositions measured by stable dynamic risk factors; (iii). Acute risk factors that are better described as triggering/contextual risk factors (iv). Acute risk factors that should be defined as the state expression of traits triggered by triggering/contextual risk factors. And second, the description of an etiological model of risk- model taking into account the interaction between significant learning events (i.e., developmental variables), psychological vulnerabilities (i.e., marked by static/historical variables and/or stable dynamic risk factors), contextual or triggering factors and their convergence in offense-related acute dynamic risk (i.e., acute psychological states).

Child↗