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941.
Synchronized neural activity in the frequency range above 20 Hz, the gamma-band, has been proposed as a signature of temporal feature binding. Here we suggest that selective attention facilitates synchronization of neural activity. Selective attention can be guided by bottom-up, stimulus driven, or top-down task-driven processes. Both processes will cause that stimuli are processed preferentially. While bottom-up processes might facilitate synchronization of neurons due to the salience of the stimulus, top-down processes may bias information selection by facilitating synchronization of neurons coding a certain location in space and/or of neurons related to the processing of certain features. Animal as well as human EEG studies support the notion of a link between induced gamma-band responses and attentive, sensory stimulus processing. 相似文献
942.
Birgit Schyns Gernot von Collani 《European Journal of Work and Organizational Psychology》2013,22(2):219-241
Three studies on occupational self-efficacy are presented. In the first study, a scale of occupational self-efficacy is developed and set in relation to several personality constructs (general self-efficacy, self-esteem, internal control beliefs, and neuroticism). The correlations found are in the expected direction and of the expected size. In a second and third study, results on the relation to task demands, leader-member exchange (that is quality of exchange between a leader and his/her subordinates), job satisfaction, and to commitment (third study) are reported and were all found to be positive and significant. In addition, occupational selfefficacy can be shown to have some incremental validity in predicting job satisfaction beyond core self-evaluation constructs. In general, occupational selfefficacy can be recommended as a reliable, one-dimensional construct. Its relations to personality constructs and organizational variables show acceptable construct and criterion validity. Implications for practical use of the instrument are discussed. 相似文献
943.
Mareike Altgassen Matthias Kliegel Maria Brandimonte Pina Filippello 《Neuropsychology, development, and cognition. Section B, Aging, neuropsychology and cognition》2013,20(3):312-328
ABSTRACT The purpose of this study was to explore the influence of social importance on prospective remembering in younger and older adults as a possible factor contributing to the age-prospective memory paradox. Using a between-subjects design, 40 younger and 40 older adults worked on a time-based prospective memory task in which social importance was varied. Overall, younger adults outperformed older adults in the prospective memory task. Importantly, in contrast to younger adults, older adults' prospective memory performance was significantly better in the social importance condition than in the standard condition. This interaction was not reflected in participants' time-monitoring behaviour. Findings are discussed in the context of recent prospective memory theories. 相似文献
944.
Céline Borg Catherine Thomas-Antérion Soline Bogey Karine Davier Bernard Laurent 《Neuropsychology, development, and cognition. Section B, Aging, neuropsychology and cognition》2013,20(5):603-614
ABSTRACT The study of memory for famous people and visual imagery retrieval was investigated in patients in the early stages of Alzheimer's disease (AD) and in the prodromal stage of AD, so-called Mild Cognitive Impairment (MCI). Fifteen patients with AD (MMSE ≥23), 15 patients with amnestic MCI (a-MCI) and 15 normal controls (NC) performed a famous names test designed to evaluate the semantic and distinctive physical features knowledge of famous persons. Results indicated that patients with AD and a-MCI generated significantly less physical features and semantic biographical knowledge about famous persons than did normal control participants. Additionally, significant differences were observed between a-MCI and AD patients in all tasks. The present findings confirm recent studies reporting semantic memory impairment in MCI. Moreover, the current findings show that mental imagery is lowered in a-MCI and AD and is likely related to the early semantic impairment. 相似文献
945.
946.
Fit indices are widely used in order to test the model fit for structural equation models. In a highly influential study, Hu and Bentler (1999) showed that certain cutoff values for these indices could be derived, which, over time, has led to the reification of these suggested thresholds as "golden rules" for establishing the fit or other aspects of structural equation models. The current study shows how differences in unique variances influence the value of the global chi-square model test and the most commonly used fit indices: Root-mean-square error of approximation, standardized root-mean-square residual, and the comparative fit index. Using data simulation, the authors illustrate how the value of the chi-square test, the root-mean-square error of approximation, and the standardized root-mean-square residual are decreased when unique variances are increased although model misspecification is present. For a broader understanding of the phenomenon, the authors used different sample sizes, number of observed variables per factor, and types of misspecification. A theoretical explanation is provided, and implications for the application of structural equation modeling are discussed. 相似文献
947.
The present study examined the role of controlled attention in age differences in event-based prospective memory performance across adolescence. The researchers tested whether presenting the prospective memory cue in or out of focal awareness of the ongoing task (resulting in low versus high demands for controlled attention, respectively) might affect age-related prospective memory performance. In total, 119 Chinese participants ages 13 to 20 took part in this study (60 adolescents: age M = 13.26 years, SD = 0.50; 23 boys; 59 young adults: age M = 19.70 years, SD = 0.87; 19 men). Findings demonstrated a significant interaction, F(1, 114) = 6.41, p < .05. No effect of age on prospective memory performance was revealed when a focal cue was used (F < 1), whereas there was a reliable age effect between adolescents and young adults when nonfocal prospective memory cues were presented, F(1, 59) = 16.13, p < .01. This pattern of results suggests that the interplay of both available resources of controlled attention and working memory, along with specific task demands, may contribute to possible age differences in prospective memory performance across adolescence. Results are discussed in the context of the multiprocess theory of prospective memory. 相似文献
948.
If priming effects serve an adaptive function, they have to be both robust and flexible. In four experiments, we demonstrated
regular evaluative-priming effects for relatively long stimulus-onset asynchronies, which can, however, be eliminated or reversed
strategically. When participants responded to both primes and targets, rather than only to targets, the standard congruity
effect disappeared. In Experiments 1a–1c, this result was regularly obtained, independently of the prime response (valence
or gender classification) and the response mode (pronunciation or keystroke). In Experiment 2, we showed that once the default
congruity effect was eliminated, strategic-priming effects reflected the statistical contingency between prime valence and
target valence. Positive contingencies produced congruity, whereas negative contingencies produced equally strong incongruity
effects. Altogether, these findings are consistent with an adaptive-cognitive perspective, which highlights the role of flexible
strategic processes in working memory as opposed to fixed structures in semantic long-term memory or in the sensorimotor system. 相似文献
949.
An adaptive cognition approach to evaluative priming is not compatible with the view that the entire process is automatically determined by prime stimulus valence alone. In addition to the evaluative congruity of individual prime-target pairs, an adaptive regulation function should be sensitive to the base rates of positive and negative stimuli as well as to the perceived contingency between prime and target valence. The present study was particularly concerned with pseudocontingent inferences that offer a proxy for the assessment of contingencies from degraded or incomplete stimulus input. As expected, response latencies were shorter for the more prevalent target valence and for evaluatively congruent trials. However, crucially, the congruity effect was eliminated and overridden by pseudocontingencies inferred from the stimulus environment. These strategic inferences were further enhanced when the task called for the evaluation of both prime stimuli and target stimuli. 相似文献
950.
In cross-sectional age variance extraction (CAVE), age, the indicator of a hypothesized developmental mechanism, and a developmental outcome are specified as independent, mediator, and target variables, respectively, to test hypotheses about behavioral development. We show that: (a) longitudinal change in a mediator variable accounting for substantial cross-sectional age-related variance in the target variable need not correlate with the target variable's longitudinal change; and, conversely, (b) longitudinal change in a mediator not sharing cross-sectional age-related variance with the target variable may nevertheless correlate highly with that variable's longitudinal change. We discourage use of CAVE for testing multivariate hypotheses about behavioral development. 相似文献