The validity of verbal reports in children's subtraction.

To assess the validity of verbal reports in children's subtraction, students in Grades 1, 3, and 5 were asked to solve a set of simple subtraction problems and were placed in the no-report, retrospective-report, or concurrent-report conditions. Two aspects of verbal report validity were assessed: reactivity, or whether providing a verbal report alters subsequent task performance, and veridicality, or whether the verbal reports are accurate reflections of solution strategies. Students in all grades and in both the retrospective-report and concurrent-report conditions were able to provide veridical strategy reports, and the instruction to verbally report had few effects on task performance. Informal findings indicate that students had less difficulty reporting retrospectively than concurrently. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Large-scale tests of a keyed, appearance-based 3-D object recognition system

We describe and analyze an appearance-based 3-D object recognition system that avoids some of the problems of previous appearance-based schemes. We describe various large-scale performance tests and report good performance for full-sphere/hemisphere recognition of up to 24 complex, curved objects, robustness against clutter and occlusion, and some intriguing generic recognition behavior. We also establish a protocol that permits performance in the presence of quantifiable amounts of clutter and occlusion to be predicted on the basis of simple score statistics derived from clean test images and pure clutter images.     

Influence de l'induction des processus d'autorégulation sur le rendement à une tache cognitive.

Examined whether inducing self-regulatory processes through a concurrent verbal report technique could improve the performance of adult participants on a concept formation task. This technique consists of instructing Ss to state explicitly the reasons underlying each of the steps employed in the process of resolving a task. It is indicated that self-regulatory processes should be optimized when individuals have access to external feedback indicating success or failure of their cognitive enterprise. To examine and dissociate the respective effect of these 2 factors, 80 university students were randomly assigned to 1 of 4 experimental conditions in a 2 (with or without concurrent report)?×?2 (with or without feedback) crossed design. Results indicate that Ss who made a concurrent report performed better than those who did not. The presence of feedback seemed to hinder performance. Results are discussed in relation to the recent model of metacognition proposed by M. Lefebvre-Pinard and the 2nd author (in press). (20 ref) (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Ratings of leadership potential at the U. S. Naval Academy and subsequent officer performance.

For 324 graduates of the class of 1951, fitness report ratings were correlated with a variety of undergraduate performance measures, including aptitude-for-service ratings, class standings in various courses, and Officer Classification Battery Test Scores. "It is concluded that the aptitude-for-service ratings reflect significant correlates of successful officer performance following graduation." The other measures were found to bear an insignificant or much lower relationship to post graduation performance measures. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Perceptual organization in schizophrenia.

A report of numerosity task was used in 2 experiments to examine the effect of inherent stimulus organization on the report accuracy of 2 S groups. Ss in each experiment were 10 schizophrenics and 10 drug abusing inpatients (controls). In both experiments, displays containing from zero to 6 lines were presented tachistoscopically. In Exp I, the lines appeared either alone or with noise elements (circles). When the lines appeared alone, schizophrenics and controls performed comparably. Their report accuracy decreased with increases in the number of lines. In the noise condition, the level of performance dropped only for schizophrenics. In Exp II, the stimulus arrays did not contain noise elements. Ss were given the task of reporting all the lines they saw. The perceptual organization of the arrays was manipulated by varying the similarity and proximity of the line elements. The performance of controls deteriorated as the organization of the arrays became more complex; schizophrenics were not affected by the organization. In fact, their average performance was significantly better than that of controls. Results of the 2 experiments are interpreted as evidence that schizophrenics' perceptual deficit lies in a failure to organize information at an early stage in processing. (24 ref) (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Situated na?ve physics: Task constraints decide what children know about density.

Children's understanding of density is riddled with misconceptions—or so it seems. Yet even preschoolers at times appear to understand density. This article seeks to reconcile these conflicting outcomes by investigating the nature of constraints available in different experimental protocols. Protocols that report misconceptions about density used stimulus arrangements that make differences in mass and volume more salient than differences in density. In contrast, protocols that report successful performance used stimulus arrangements that might have increased the salience of density. To test this hypothesis, the present experiments manipulate the salience of object density. Children between 2 and 9 years of age and adults responded whether an object would sink or float when placed in water. Results indicated that children's performance on exactly the same objects differed as a function of the saliency of the dimension of density, relative to the dimensions of mass and volume. These results support the idea that constraints—rather than stable knowledge—drive performance, with implications for teaching children about nonobvious concepts such as density. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Silverman's subliminal psychodynamic activation: A failure to replicate.

L. H. Silverman's (see record 1977-05955-001) report that subliminally presented stimuli designed to increase or decrease oedipal conflict can affect competitive performance was tested in 3 experiments on a total of 91 male undergraduates. In none of the experiments was there a difference between performance following exposure to subliminal oedipal conditions and performance following neutral baseline conditions. Results should be considered in light of changes made over the course of these experiments that produced a bias in favor of replication. (13 ref) (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Neuropsychological dysfunction and clinical outcome in psychiatric disorders: a two-year follow-up study

The presence of neuropsychological disturbances in schizophrenia and mood disorders raises the question that cognitive impairments might contribute to poor outcome. This report examines changes in neuropsychological performance from hospitalization to a 2-year follow-up evaluation in relation to psychosocial outcome. Findings indicated that unfavorable clinical outcome is associated with marginal changes in neuropsychological performance, whereas good outcome status is associated with neuropsychological improvement. Neuropsychological improvement may thus require a stable period of favorable psychosocial recovery, in schizophrenia and schizoaffective disorder, as well as major mood disorder syndromes.     

Prediction of job performance from assessment reports: Use of a modified Q-sort technique to expand predictor and criterion variance.

Compared predictions of performance and personality characteristics made on the basis of preemployment psychological assessment reports with subsequent performance evaluations contained in the fitness reports of 32 government employees. 7 psychologists reviewed the assessment reports to predict overall job effectiveness, specific performance, and personality characteristics. They then reviewed the narrative section of each fitness report to rate the overall effectiveness of each S. Ratings were made using a modified Q-sort technique that reliably expanded the variances of predictor and criterion variables. A significant positive relationship was found between predicted and actual effectiveness. In addition, the psychologists were able to predict specific performance and personality dimensions on a significantly better than base-rate basis. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Loving yourself abundantly: Relationship of the narcissistic personality to self- and other perceptions of workplace deviance, leadership, and task and contextual performance.

The authors report results from 2 studies assessing the extent to which narcissism is related to self- and other ratings of leadership, workplace deviance, and task and contextual performance. Study 1 results revealed that narcissism was related to enhanced self-ratings of leadership, even when controlling for the Big Five traits. Study 2 results also revealed that narcissism was related to enhanced leadership self-perceptions; indeed, whereas narcissism was significantly positively correlated with self-ratings of leadership, it was significantly negatively related to other ratings of leadership. Study 2 also revealed that narcissism was related to more favorable self-ratings of workplace deviance and contextual performance compared to other (supervisor) ratings. Finally, as hypothesized, narcissism was more strongly negatively related to contextual performance than to task performance. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Effect of milk processing on the concentration of folate-binding protein (FBP), folate-binding capacity and retention of 5-methyltetrahydrofolate

Predicted performance experiments attempt to quantify an impaired individual's awareness of his or her deficit. These experiments measure perceived ability by the individual's prediction of his or her performance on a specific cognitive task and actual ability by his or her subsequent performance on that task. To date, the most comprehensive predicted performance experiment is the one proposed and implemented by McGlynn and Kaszniak (1991b). This experiment is potentially capable of removing a number of influences that may be confounded with deficit unawareness; however, it is not obvious what method of quantitative analysis best exploits this capability. In the present report, several possibilities are discussed. The limitations of McGlynn and Kaszniak's method are identified, and a more satisfying measure of deficit unawareness is proposed.     

Measuring team knowledge: A window to the cognitive underpinnings of team performance.

The authors report an effort aimed at developing and evaluating measures of taskwork and teamwork team knowledge for teams in which members differ in knowledge backgrounds. These measures were used in a study with 36 teams to explore the cognitive underpinnings of team performance variations due to cross-training regime. The authors demonstrate that these measures are valid and provide team performance information that complements outcome and behavioral measures. Teams exposed to full cross-training acquired more taskwork and teamwork knowledge than control teams or teams exposed to a conceptual version of cross-training. Measures of team knowledge provide information regarding team task performance critical for system design and training programs. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Reputation as a moderator of political behavior-work outcomes relationships: A two-study investigation with convergent results.

Personal reputation has been acknowledged to have an important influence on work outcomes. However, substantive research has been relatively scarce to date. The 2-study research plan reported here supports reputation's role as a moderator of the relationships between political behavior and the work outcomes of uncertainty, emotional exhaustion, and job performance ratings (i.e., self- and supervisor report). The 1st investigation contained both a pilot study, which was undertaken to demonstrate the consistency of self- and others' perceptions of reputation, and a test of the substantive relationships. The 2nd study served as a constructive replication of the hypothesized relationships. Supporting prior research, Study 1 demonstrated that self-reports of personal reputation were significantly related to peer report. In each study, political behavior was associated with decreased uncertainty and emotional exhaustion and increased job performance ratings for individuals with a favorable reputation. Conversely, political behavior predicted increased uncertainty and emotional exhaustion and decreased job performance ratings for individuals with an unfavorable reputation. Implications of these results, strengths and limitations, and directions for future research are discussed. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Fate of neglected targets: A chronometric analysis of redundant target effects in the bisected brain.

The authors examined some of the sensorimotor effects of the split-brain operation to understand how a "dual mind" can produce unified behavior. They report psychophysical evidence of extinction to bilateral simultaneous stimulation in callosotomy patient J.W.: Although he could verbally report the occurrence of a unilateral left or right visual field target, left field report accuracy dropped by 34% when targets occurred bilaterally. Paradoxically, the same stimulus conditions produced abnormally robust redundant signal effects on simple manual and vocal reaction times, which exceeded predictions that were based on probability summation. Neural summation is often inferred from redundancy gain of this magnitude. Because this seems less likely after callosotomy, the authors suggest a model that is based on response competition between the disconnected hemispheres to account for J.W.'s redundant target effects. The dissociation between explicit report and motor performance is discussed. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Disengaging attention: On the locus of the cue-duration effect in partial report.

Increasing cue duration impairs performance in bar-probe partial report when cues are presented peripherally, but not centrally (P. Dixon, R. Gordon, A. Leung, & V. Di Lollo, 1997). Three experiments examined whether this cue-duration effect reflects processes of exogenous attention. The effect of cue duration on partial report performance with peripheral, but not central, cues was replicated (Experiment 1). Further experiments manipulated the degree that exogenous versus endogenous modes of selection were favored and found that the cue-duration effect for peripheral cues was reduced (1) when blocks contained a high proportion of central cues (Experiment 2) and (2) when the color of the cue indicated the location of the target (Experiment 3). These findings challenge the view that the cue-duration effect is restricted to exogenous attention and are discussed in terms of the process of disengaging attention from the cue to reallocate attention to the target representation. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Neurocognitive deficit in schizophrenia: a quantitative review of the evidence

The neurocognitive literature on test performance in schizophrenia is reviewed quantitatively. The authors report 22 mean effect sizes from 204 studies to index schizophrenia versus control differences in global and selective verbal memory, nonverbal memory, bilateral and unilateral motor performance, visual and auditory attention, general intelligence, spatial ability, executive function, language, and interhemispheric tactile-transfer test performance. Moderate to large raw effect sizes (d > .60) were obtained for all 22 neurocognitive test variables, and none of the associated confidence intervals included zero. The results indicate that schizophrenia is characterized by a broadly based cognitive impairment, with varying degrees of deficit in all ability domains measured by standard clinical tests.     

Know thyself: Misperceptions of actual performance undermine achievement motivation, future performance, and subjective well-being.

Contrary to the popular assumption that self-enhancement improves task motivation and future performance, the authors propose that both inflated and deflated self-assessments of performance are linked to an increased likelihood of practicing self-handicapping and having relatively poor performance in future tasks. Consistent with this proposal, we found that irrespective of the level of actual performance, compared with accurate self-assessment, both inflated and deflated self-assessments of task performance are associated with a greater tendency to (a) practice self-handicapping (Study 1: prefer to work under distraction; Study 2: withhold preparatory effort), (b) perform relatively poorly in a subsequent task (Study 3), (c) have relatively low academic achievement (Study 4), and (d) report a relatively low level of subjective well-being (Study 5). The authors discuss these results in terms of their educational implications. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

抓重点、做精品、出亮点,推进协会各项工作再上新台阶——中国钨业协会五届四次理事会工作报告

回顾总结了2011年中国钨业协会工作情况,并就2012年协会工作谈几点建议,从7个方面部署新一年的工作,以推进中国钨业协会各项工作上新台阶。     

The effects of sex steroids on spatial performance: A review and an experimental clinical investigation.

Males typically surpass females in spatial performance, an outcome that may be linked to testosterone and estrogen. The authors (a) review physiological mechanisms, developmental periods, and past empirical work relevant to sex steroids' effects on human spatial performance and (b) report an experimental study of the role of actively circulating sex steroids in 55 adolescents being treated for delayed puberty (mean age 13.70 yrs). Sex steroids (stimulating early, middle, and late puberty) and placebos were given alternately over 21 months and spatial tests were given every 3 months. Spatial performance showed traditional sex differences but did not vary with levels of actively circulating sex steroids. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Psychological well-being and job satisfaction as predictors of job performance.

The happy–productive worker hypothesis has most often been examined in organizational research by correlating job satisfaction to performance. Recent research has expanded this to include measures of psychological well-being. However, to date, no field research has provided a comparative test of the relative contribution of job satisfaction and psychological well-being as predictors of employee performance. The authors report 2 field studies that, taken together, provide an opportunity to simultaneously examine the relative contribution of psychological well-being and job satisfaction to job performance. In Study 1, psychological well-being, but not job satisfaction, was predictive of job performance for 47 human services workers. These findings were replicated in Study 2 for 37 juvenile probation officers. These findings are discussed in terms of research on the happy–productive worker hypothesis. (PsycINFO Database Record (c) 2010 APA, all rights reserved)