"The very best of the millennium": Longitudinal research and the demand-control-(support) model.

This study addressed the methodological quality of longitudinal research examining R. Karasek and T. Theorell's (1990) demand-control-(support) model and reviewed the results of the best of this research. Five criteria for evaluating methodological quality were used: type of design, length of time lags, quality of measures, method of analysis, and nonresponse analysis. These criteria were applied to 45 longitudinal studies, of which 19 (42%) obtained acceptable scores on all criteria. These high-quality studies provided only modest support for the hypothesis that especially the combination of high demands and low control results in high job strain. However, good evidence was found for lagged causal effects of work characteristics, especially for self-reported health or well-being outcomes. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Microscale elastic strain evolution following damage in Ti-SiC composites

Fiber fractures are crucial in initiating damage zones that ultimately determine the strength and lifetime of fiber-reinforced metal matrix composites. The evolution of damage in a metal matrix composite (MMC) comprised of a row of unidirectional SiC fibers (32 vol pct) surrounded by a Ti matrix was examined, for the first time, using X-ray microdiffraction. Multiple strain maps including both phases were collected in situ under applied tensile stress. The elastic axial strains were then compared to predictions from a modified shear-lag model, which, unlike other shear-lag models, considers the elastic response of both constituents. The strains showed good correlation with the model. The results confirmed, for the first time, both the need and validity of this new model specifically developed for large scale multifracture simulations of MMCs. The results also provided unprecedented insight for the model, revealing the necessity of incorporating such factors as plasticity of the matrix, residual stress in the composite, and selection of the load sharing parameter.     

Classical conditioning after cerebellar lesions in humans.

Explored classical conditioning in human Ss who had lesions in their cerebellar circuitry. Seven patients with damage to cerebellar structures and matched control Ss underwent simple delay tone–airpuff conditioning. Eyelid CR acquisition was severely disrupted in the patient group, whereas autonomic CRs and slow cortical potentials developing between the CS and the unconditioned stimulus/stimuli (UCS) were unaffected. Results are consistent with animal studies and earlier case reports indicating that intact cerebellar structures are necessary for the acquisition of classically conditioned motor responses. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Word perception and misperception in context.

When reading lists of words and nonwords at 100 msec/word, Ss reported words accurately but frequently converted nonwords such as dack into similarly spelled words such as duck or deck. In sentences, both nonwords and anomalous words were misread as appropriate words, but the bias was greater for nonwords. Word associations in lists (e.g., sailor–dack–vessel) produced a similar bias, but when sentence meaning was pitted against such associations the lexical effect was largely overridden. Sentences in which biasing context appeared only after the critical item reduced but did not eliminate the context effect, suggesting that multiple word candidates remained active while at least the next 3 words were processed. These results support a 2-stage modular interactive model: The 1st stage is stimulus driven and emits multiple weighted candidates that are combined interactively with contextual information in a 2nd stage. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Self-construals and social anxiety among Asian American college students: Testing emotion suppression as a mediator.

Although past studies have revealed ethnic and cultural variations in social anxiety, little research addresses why these variations might arise. The present study addressed this gap by examining emotion regulation as an explanatory mechanism that may account for such differences. Drawing from a culture-specific (Kitayama, Karasawa, & Mesquita, 2004), as well as process-based (Gross, 1998) model of emotion regulation, we hypothesized that emotion suppression would mediate associations between self-construals (interdependent and independent) and social anxiety symptoms. The data analytic sample consisted of 784 self-identified Asian American college students from 20 colleges/universities in the United States. Participants completed the study measures via a confidential, online questionnaire. Structural equation modeling (SEM) analyses indicated a significant indirect effect of both types of self-construal on social anxiety through emotion suppression. Specifically, an interdependent self-construal was associated with more (whereas an independent self-construal was associated with less) emotion suppression, which in turn, was associated with higher levels of social anxiety. Clinically, these findings suggest that an individual's emotion regulation strategy could serve as a proximal target of intervention among Asian American young adults. (PsycINFO Database Record (c) 2011 APA, all rights reserved)     

Improving mental health services for Latino and Asian immigrant elders.

Given the changing demographics of the aging population in the United States, it is likely that professional psychologists will encounter elderly clients from diverse backgrounds in their practice. Asians and Latinos represent the 2 fastest growing groups of elderly immigrants. This article offers information and practical suggestions to assist clinicians working with elderly Asian and Latino immigrant clients. Specific recommendations for enhancing assessment and treatment efficacy with these populations are also provided. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Perceptions of the Parent-Adolescent Relationship: A Longitudinal Investigation.

Aself-report measure of conflict and aspects of warmth in the parent-child relationship was completed by 1,330 11-year-old twins, 1,176 of whom completed the inventory again 3 years later. On average, adolescents' perceptions of the quality of the parent-child relationship declined consistently and moderately between age 11 and age 14. Conflict with parents increased, whereas all aspects of warmth decreased; changes were significantly greater for girls than boys. Variances increased with age, primarily because of increases in the magnitude of genetic effects. Heritability estimates ranged from .09 to .31 at intake and .35 to .45 at follow-up and tended to be higher for boys than girls. Changes in the parent-child relationship are interpreted as reflecting genotype-environment correlation processes whereby adolescents increasingly influence their relationships with their parents. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

The competency movement within psychology: An historical perspective.

The authors provide a recitation of events in recent years that document an increased focus on competency-based models of education, training, and assessment in professional psychology, particularly clinical, counseling, and school psychology, based on the work of the American Psychological Association's (APA's) Task Force on Assessment of Competence in Professional Psychology. The article begins with the inclusion of competencies as part of the "Ethical Principles of Psychologists and Code of Conduct" (APA, 2002). Next, accreditation practices in the United States and Canada are summarized. Competency-based education, training, and credentialing efforts in professional psychology are reviewed, including graduate, practicum, internship, and postdoctoral levels; licensure; postlicensure certifications; and board certification. General and specialty credentialing efforts both in North America and internationally follow. The Competencies Conference: Education and Credentialing in Professional Psychology and work on developing competencies for the profession are discussed. Then initiatives focused specifically on the assessment of competence are delineated. Implications for continued progress toward a culture of the assessment of competence are discussed in light of the historical origins within the profession of the competency-based movement. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Levels-of-processing effects on recollection and familiarity during transient global amnesia and after recovery.

Objective: The aim of the present study was to investigate the pattern of recollection and familiarity deficits and the modulation of recognition memory performance by the depth of encoding (deep vs. shallow) in transient global amnesia (TGA). Method: Ten patients with TGA and 11 control subjects were assessed during the acute stage and after recovery 7 to 19 days later. Results: Both recollection and familiarity were impaired in the acute stage and showed significant, albeit not complete, recovery by the time of the postacute assessment. The patients did, however, show a significant levels-of-processing effect, which was significantly reduced in acute TGA, but not at follow-up. Conclusion: The significant levels-of-processing effect during acute TGA might be linked to recruitment of the prefrontal cortex. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Automatic constraints generation for semisupervised clustering: experiences with documents classification

In the last times, semi-supervised clustering has been an area that has received a lot of attention. It is distinguished from more traditional unsupervised approaches on the use of a small amount of supervision to “steer” clustering. Unfortunately in the real world, the supervision is not always available: data to process are often too large and so the cost (in terms of time and human resources) for user-provided information is not conceivable. To address this issue, this work presents an automatic generation of the supervision, by the analysis of the data structure itself. This analysis is performed using a partitional clustering algorithm that discovers relationships between pairs of instances that may be used as a semi-supervision in the clustering process. The methodology has been studied in the document clustering domain, an area where novel approaches for accurate documents classifications are strongly required. Experimental result shows the validity of this approach.