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671.
The present study reports on the reliability and validity of an improved body image assessment scale, namely the female Photographic Figure Rating Scale (PFRS). This scale consists of ten photographic images of real women varying in body mass index (BMI) from emaciated to obese. The PFRS was designed to overcome many of the limitations associated with line-drawn figures that are currently in use, including a lack of realism and poor ecological validity. Based on a sample of 208 adult women, the results of the present study showed that the PFRS had good validity in that all images were correctly rank-ordered by BMI. In addition, construct validity was supported by the finding that current self-ratings of body size based on the PFRS were significantly correlated with participants’ BMI and that body dissatisfaction was negatively correlated with positive body image. Finally, test–retest reliabilities showed that the PFRS remained stable after a three-week interval. The discussion focuses on the strengths and limitations of the PFRS in relation to existing scales used in body image assessment.  相似文献   
672.
We report a test of an influential theory of employee turnover: the unfolding model ( Lee & Mitchell, 1994 ; Lee, Mitchell, Holtom, McDaniel, & Hill, 1999 ). We describe and critique this classificatory model, and propose both theory‐based and empirical refinements. The two extant tests of the current version of the model have both been with accountants in the United States, so the generalisability of the model is as yet unproven. We present results of an attempt to classify 352 nurse leavers from the United Kingdom's National Health Service using the unfolding model. In contrast to the findings of Lee et al. (1999 ), the model failed to classify a substantial number of nurse leavers, and specific hypotheses derived from the model received only partial support. Classification failures were investigated using both quantitative and qualitative data. Leavers were more likely to be classified if they had no dependants and described their quit as avoidable. Although the unfolding model incorporates more kinds of turnover than traditional turnover models, such systematic classification failure casts doubt on claims that it offers a comprehensive account of turnover. We explain failures with reference to: (i) shortcomings in a key measure; (ii) the characteristics of the occupational group studied; and (iii) the extremely tight labor market for this group of leavers. Nous testons la théorie influente concernant le turnover des salariés: the unfolding model ( Lee & Mitchell, 1994 ; Lee, Mitchell, Holtom, McDaniel & Hill, 1999 ). Après avoir décrit et critiqué ce modèle de classification, nous proposons des améliorations tant au niveau théorique qu’empirique. La version actuelle du modèle a été testée à deux reprises auprès de comptables des Etats‐Unis, aussi ce modèle n’a pas pu être généralisé. Nous présentons les résultats obtenus en utilisant le “unfolding model” auprès de 352 infirmières du service de santé national du Royaume‐Uni qui sont sur le départ. Contrairement aux résultats obtenus par Lee et al. (1999 ), le modèle n’a pas permis de classer un nombre substantiel d’infirmières sur le départ et certaines hypothèses découlant de ce modèle ne reçoivent qu’une validation partielle. Ces échecs de classification ont été analysés tant quantitativement que qualitativement. Il ressort que les sujets étaient plus facilement classés si ils n’avaient aucune personne à charge et si ils décrivaient leur départ comme évitable. Bien que le “unfolding model” incorpore plus de formes de turnover que les modèles traditionnels, un échec de classification aussi systématique questionne quant à sa revendication à offrir une approche complète du turnover. Nous expliquons ces échecs par: (i) des imperfections dans la mesure principale (ii) les caractéristiques du groupe de salariés étudiés (iii) un marché du travail extrêmement difficile pour ce groupe de personnes sur le départ.  相似文献   
673.
The distribution of landing positions and durations of first fixations in a region containing a noun preceded by either an article (e.g., the soldiers) or a high-frequency 3-letter word (e.g., all soldiers) were compared. Although there were fewer first fixations on the blank space between the high-frequency 3-letter word and the noun than on the surrounding letters (and the fixations on the blank space were shorter), this pattern did not occur when the noun was preceded by an article. R. Radach (1996) inferred from a similar experiment that did not manipulate the type of short word that 2 words could be processed as a perceptual unit during reading when the first word is a short word. As this different pattern of fixations is restricted to article-noun pairs, it indicates that word grouping does not occur purely on the basis of word length during reading; moreover, as the authors demonstrate, one can explain the observed patterns in both conditions more parsimoniously without adopting a word-grouping mechanism in eye movement control during reading.  相似文献   
674.
This study tested predictions of the metacognitive model of post-traumatic stress disorder (Wells, 2000) concerning relationships between stress symptoms and maladaptive control of thoughts. We tested the hypothesis that the tendency to use worry as a means of controlling thoughts will be positively predictive of stress symptoms. In doing so, overlaps with symptomatic worry, stress symptoms, and stress exposure at time 1 was controlled. One hundred and ten (110) college students were assessed twice, over a three-month period. Consistent with predictions, use of worry as a thought control strategy made a significant and independent contribution to the prediction of stress symptoms. The findings provide further support for Wells' metacognitive model of stress reactions.  相似文献   
675.
Research is increasingly documenting a neurobiological basis to violence. This review takes a neurodevelopmental perspective on the very small group of males who grow up to become persistent violent offenders. After outlining six criteria for what constitutes a neurodevelopmental disorder, the extent to which chronic violence meets these definitional criteria is examined, covering the fields of genetics, structural and functional brain imaging, and neuropsychology. Early health risk factors for violence are then outlined, including birth complications, minor physical anomalies, prenatal smoking and alcohol exposure, poor nutrition, lead exposure, and traumatic brain injury. Persistent adult violence is argued to originate in aberrant temperamental behavior in early childhood, to have a stable developmental trajectory, and to be associated with impaired education, social, and occupational functioning. Taken together, it is argued that chronic adult violence meets criterion for being conceptualized as having neurodevelopmental origins and that an important, but not sole, source of neural maldevelopment lies in prenatal and early postnatal risk factors. This review concludes with a recognition of the sociopolitical context within which a neurodevelopmental perspective on chronic violence sits, together with directions for future research, including whether a neurodevelopmental hypothesis is best applied to reactive as opposed to proactive aggression.  相似文献   
676.
Previous research in the UK has suggested that cross-cultural bias in personality disorder diagnosis might partly account for the smaller proportion of Black, relative to White, patients with personality disorder in secure psychiatric hospitals. Using the case-vignette method, we investigated cross-cultural clinical judgment bias in the diagnosis of personality disorder in African Caribbean men by 220 forensic psychiatrists in the UK. In the vignette describing possible DSM-IV antisocial personality disorder, Caucasians were 2.8 times more likely to be given a diagnosis of personality disorder than African Caribbeans. Diagnosis also varied according to the ethnicity of the clinicians. No cross-cultural bias was found in the vignette describing possible DSM-IV borderline personality disorder. These findings are important in relation to recent policies for offenders and others with personality disorder, and to the current focus on delivering race equality in mental health services in the UK. Ongoing debates about the strengths and limitations of the case-vignette method are also discussed.  相似文献   
677.
This study aimed to determine whether participants used different criteria to allocate scarce medical resources depending on the medical condition. Allocations of HIV antiretroviral treatment and heart-transplant surgery were examined. Participants completed 2 questionnaires requiring them to prioritize 16 hypothetical patients. Demographic data on hypothetical patients varied on 4 dimensions: age, gender, sexual orientation, and promiscuity. There were significant main effects of age, sexual orientation, and promiscuity in both medical conditions. Young people were favored over old, heterosexuals over homosexuals, and monogamous over promiscuous patients. Stronger effects of sexual orientation and promiscuity were found in the HIV treatment condition. Participants used a more utilitarian approach in their allocation decisions and demonstrated prejudice against homosexuals and promiscuous patients.  相似文献   
678.
Exposure therapy and cognitive behaviour therapy (CBT) are both effective in the treatment of panic disorder with agoraphobia. Cognitive theories suggest that the way in which exposure to avoided situations is implemented in either treatment may be crucial. In particular, it is suggested that clinical improvement will be greatest if opportunities for disconfirmation of feared catastrophes are maximized. In a small pilot study, 16 patients with panic disorder and (moderate or severe) agoraphobia were randomly allocated to either habituation based exposure therapy (HBET) or exposure planned as a belief disconfirmation strategy and accompanied by dropping of safety-seeking behaviours. Both treatments were brief (total of 3.25 h of exposure) and were similar in terms of expectancy of change. Patients in the CBT condition showed significantly greater improvements in self-report measures of anxiety, panic and situational avoidance. They also completed significantly more steps in a standardized behavioural walk, during which they experienced significantly less anxiety. The controlled effect sizes for CBT were substantial (range 1.7-2.7), which suggests it may be a particularly efficient way of managing therapeutic exposure to feared situations in panic disorder with agoraphobia. Further research is needed to clarify the mechanism of change involved.  相似文献   
679.
Top-down inhibition of search distractors in parallel visual search   总被引:2,自引:0,他引:2  
In three experiments, we examined distractor inhibition in parallel ("pop-out") visual search. Distractor inhibition was measured in terms of reaction time (RT) to a simple luminance increment probe presented, after the search task response, at display locations that either contained a search distractor (on-probe) or were blank (off-probe). When the search stimuli remained in view, the on-probe (relative to off-probe) RT cost was larger than in a baseline condition in which observers had only to passively view, rather than search, the display. This differential on-probe RT cost, which discounts effects of masking, was interpreted as a measure of distractor inhibition associated with target selection in parallel visual search. Taken together, the results argue that the distractor inhibition is an object-based and local phenomenon that affects all distractors (of a particular type) in an equal manner.  相似文献   
680.
Metacognitive theory and therapy views the persistence of negative beliefs and thoughts as a result of metacognitions controlling cognition. This paper describes, with reference to the treatment of generalized anxiety disorder (GAD) and social phobia, how metacognition contributes to cognitive stability and to change. Metacognitive therapy offers a level of formulation and intervention that does not focus predominantly on challenging the content of negative thoughts and beliefs that are emphasized in traditional cognitive therapy. The focus of treatment in GAD is on erroneous beliefs about worry and unhelpful mental regulation strategies. In treating social phobia, a greater emphasis is placed on modifying attention and worry processes and on configuring processing during and after behavioral experiments.  相似文献   
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