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891.
The relationship of fear of falling and balance confidence with balance and dual tasking performance
Hadjistavropoulos T Carleton RN Delbaere K Barden J Zwakhalen S Fitzgerald B Ghandehari OO Hadjistavropoulos H 《Psychology and aging》2012,27(1):1-13
According to traditional conceptualizations of the relationship between fear of falling and falls in older adults, fear of falling is considered to be predictive of falls because it leads to activity avoidance which, in turn, leads to de-conditioning that increases fall risk. The recent literature has begun to challenge such conceptualizations. Specifically, it has been argued that fear of falling and anxiety, in and of themselves, have a direct negative effect on balance. In this study we manipulated anxiety level by asking older research participants to walk either on the floor (low anxiety condition) or an elevated platform (high anxiety condition). Half the time participants carried a tray (dual tasking) and half the time they did not. Manipulation checks (involving heart rate, galvanic skin response, and self-reported anxiety measurement) confirmed that the experimental manipulation was successful in affecting anxiety level. The results demonstrate that the experimental manipulation (platform vs. floor) affected balance parameters and dual tasking performance with the platform condition resulting in a less stable gait. In addition, increased task demand (i.e., dual tasking) also had a negative effect on balance performance. Finally, the results demonstrate that the paper and pencil measures of fear can also predict balance performance (although the variance accounted for is small) even after controlling for medical risk factors for falling. Implications for models of fear of falling are discussed. 相似文献
892.
Comorbid DSM-IV Axis II personality disorders appear to be common in pathological gambling (PG) and may contribute to the chronic problems often associated with the disorder. This study sought to examine the relationship between PG, personality disorders, and impulsivity in a sample of pathological gamblers. Personality assessments included the SCID-II, Eysenck Impulsiveness Questionnaire, Tridimensional Personality Questionnaire, and Barratt Impulsiveness Scale. A total of 77 individuals with DSM-IV PG were included in this study, of which 35 (45.5%) met criteria for at least one personality disorder. Specific aspects of impulsivity were associated with certain personality disorders in PG when grouped by cluster, yet the presence of a personality disorder was not positively correlated with gambling severity. It remains unclear how the presence of a personality disorder and aspects of impulsivity may affect treatment outcome. Further exploration of these disorders and dimensions of personality may encourage a more inclusively global treatment approach. 相似文献
893.
The present study uses an alternate analytical framework to examine the degree to which performance is differentiated by dimensions in assessment center (AC) exercises and whether these performance dimensions are rated on the same scale across exercises. Confirmatory factor analysis likelihood ratio tests supported the presence of three broad latent performance dimensions in each of three AC exercises. Additional tests revealed that five of six manifest performance dimensions were rated on the same psychological scale across exercises. Taken together, our results support a multidimensional interpretation of AC exercises and provide empirical support to the notion that differences in AC performance across exercises reflect true performance, rather than a measurement artifact. 相似文献
894.
Spann MN Mayes LC Kalmar JH Guiney J Womer FY Pittman B Mazure CM Sinha R Blumberg HP 《Child neuropsychology》2012,18(2):182-189
Childhood maltreatment (CM) has been associated with diminished executive functioning in children and adults; however, there is a relative paucity of study of executive function in adolescents exposed to CM. Yet, executive dysfunction in adolescence may have important adverse consequences including increased vulnerability to risky behaviors and impaired school functioning. This study investigates the relationship between self-reported CM and an executive function, cognitive flexibility, in adolescents without identified psychiatric disorders. Effects of physical and emotional, abuse and neglect, maltreatment subtypes were explored. Thirty adolescents ages 12-17 years, 50% females, completed the retrospective self-report Childhood Trauma Questionnaire (CTQ) and were administered the Wisconsin Card Sorting Test (WCST). Correlational analyses assessed the relationship between WCST perseverative error scores norm-referenced for age and education with CTQ total scores. The relationship with nonperseverative errors, as well as with physical and emotional abuse and neglect CM subscores, were explored. Total CTQ scores showed significant associations with perseverative errors on the WCST, but not with nonperseverative errors. Significant associations with perseverative errors were seen for physical abuse and physical neglect among the CTQ subscales. The results suggest both physical abuse and physical neglect are associated with diminished cognitive flexibility in adolescents. These effects were detected in adolescents without identified psychiatric diagnoses suggesting the importance of considering executive dysfunction in adolescents exposed to CM who may not meet diagnostic criteria for an Axis I disorder and that tests of perseverative errors, such as those of the WCST, may be sensitive indicators of this dysfunction. 相似文献
895.
During the penalty phase of capital trials, defendants may introduce mitigating evidence that argues for a punishment "less than death." In the past few years, a novel form of mitigating evidence-brain scans made possible by technological advances in neuroscience-has been proffered by defendants to support claims that brain abnormalities reduce their culpability. This exploratory study assessed the impact of neuroscience evidence on mock jurors' sentencing recommendations and impressions of a capital defendant. Using actual case facts, we manipulated diagnostic evidence presented by the defense (psychosis diagnosis; diagnosis and neuropsychological test results; or diagnosis, test results, and neuroimages) and future dangerousness evidence presented by the prosecution (low or high risk). Recommendations for death sentences were affected by the neuropsychological and neuroimaging evidence: defendants deemed at high risk for future dangerousness were less likely to be sentenced to death when jurors had this evidence than when they did not. Neuropsychological and neuroimaging evidence also had mitigating effects on impressions of the defendant. We describe study limitations and pose questions for further research. 相似文献
896.
How should we measure metacognitive (“type 2”) sensitivity, i.e. the efficacy with which observers’ confidence ratings discriminate between their own correct and incorrect stimulus classifications? We argue that currently available methods are inadequate because they are influenced by factors such as response bias and type 1 sensitivity (i.e. ability to distinguish stimuli). Extending the signal detection theory (SDT) approach of Galvin, Podd, Drga, and Whitmore (2003), we propose a method of measuring type 2 sensitivity that is free from these confounds. We call our measure meta-d′, which reflects how much information, in signal-to-noise units, is available for metacognition. Applying this novel method in a 2-interval forced choice visual task, we found that subjects’ metacognitive sensitivity was close to, but significantly below, optimality. We discuss the theoretical implications of these findings, as well as related computational issues of the method. We also provide free Matlab code for implementing the analysis. 相似文献
897.
Previous work on social support and stress tolerance using laboratory-based cardiovascular stress response paradigms has suggested that perceived social support may be effective in building resilience in recipients. However, such paradigms are often socially de-contextualized insofar as they fail to take account of the social aspects of stress itself. Using 90 healthy college women, the present study sought to examine the association between self-reported perceived social support and cardiovascular stress tolerance. Participants underwent two consecutive exposures to a mental arithmetic task. On second exposure to the stressor, participants completed the task under either social threat or control conditions. Social threat was manipulated using socially salient instructions, to create a high social context. Adaptation to stress was established in terms of comparisons between cardiovascular responses to successive exposures. Results showed that cardiovascular responses tended to habituate across time, with perceived social support associated with the degree of habituation, but only under certain contextual conditions; high perceived support was associated with effective habituation under control conditions only. This response pattern is consistent with the view that high perceived social support buffers against stress in healthful ways, but only in asocial contexts. 相似文献
898.
Lauren M. Haack Alyson C. Gerdes Bethdalie Cruz Brian W. Schneider 《Journal of child and family studies》2012,21(2):177-183
The goals of the current study were to develop and employ culturally-modified recruitment strategies utilizing flexibility
and creativity to combat practical and cultural barriers to Latino participation in clinical child research, as well as to
quantitatively examine individual and cultural factors related to the different recruitment strategies. In total, 45 Latino
parents were successfully recruited and primarily included married mothers of Mexican origin with varied socioeconomic backgrounds.
To address the first study goal, an initial culturally-modified recruitment strategy (i.e., postcard strategy, n = 23) was developed to combat both practical and cultural barriers; an augmented strategy (i.e., face-to-face strategy, n = 22) was later employed to further combat potential barriers. Unfortunately, neither strategy resulted in the desired sample
size of 150 parents. To examine the second study goal, an exploratory, quantitative examination of individual and cultural
factors related to the different strategies was conducted. In general, results suggested that there were differences in the
demographics of the parents who responded to the different recruitment strategies, such that those recruited through the face-to-face
strategy were more educated, more acculturated, and spoke more English than those recruited through the postcard strategy.
Much needed future directions are discussed. 相似文献
899.
900.
Physical activity is associated with many benefits, but persons with multiple sclerosis (MS) are less physically active than the general population. There is a critical need for research on methods of increasing and sustaining the physical activity levels of this population. This randomized controlled trial examined the efficacy of an Internet-delivered and theory-based behavioral intervention that was supplemented with video coaching for increasing and sustaining physical activity over time in persons with MS. Physically inactive, ambulatory persons with MS (N?=?45) were randomly assigned to intervention (n?=?22) or control (n?=?23) conditions and completed a battery of questionnaires before, after, and three months after a 12-week intervention period. Data analyses were conducted in PASW 18.0. Partial eta squared ([Formula: see text]) effect size indicated that there was a large, statistically significant condition-by-time interaction on physical activity ([Formula: see text]). Cohen's d effect sizes indicated that the intervention group had a large increase in physical activity after the 12-week trial (d?=?.98) that was sustained over a three-month follow-up (d?=?.79). The current study supports the efficacy of a behavioral intervention for increasing and sustaining physical activity in a sample of persons with MS. 相似文献