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31.
Cognitive development of lead exposed children from ages 6 to 15 years: an application of growth curve analysis. 总被引:2,自引:0,他引:2
The effect of lead exposure on cognitive growth patterns was assessed in a longitudinal study of 196 children. Performances on tests of verbal comprehension and perceptual organization (Vocabulary & Block Design, Wechsler Intelligence Scales for Children) were measured at ages 6.5, 11 and 15 years. Growth curve analyses revealed that the quadratic model best described the relationship between test scores and age. Children with higher lead levels, as measured at age 15 years, demonstrated lower verbal comprehension scores over time and greater decline in their rate of Vocabulary development at age 15 years, as compared to children with lower lead levels. Lead exposure was not significantly associated with growth in perceptual organization test scores. Socioeconomic status and maternal intelligence were statistically significantly associated with growth patterns for both test scores, independent of the effects of lead. The findings suggest that lead negatively impacts the developmental progression of specific cognitive skills from childhood through adolescence. 相似文献
32.
H Dietrich 《Psychiatrie, Neurologie, und medizinische Psychologie》1979,31(12):730-737
Unlike the other five deadly sins of the Church, sloth is not attributed to an instinct or an impulse but to an anancastic form of reaction. A phlegmatic person is characterised by a lack of egoistic or altruistic instincts while feelings of nausea or fear are increased. Among phlegmatic persons those of clinical importance are epileptoid psychopaths, oblomovists and those exhibiting (forms of) phlegmatic temperament combined with obsessional or hysterical neurosis. 相似文献
33.
Converging experimental operations and several prospective memory tasks were used across three experiments to determine the extent to which prospective remembering is supported by datadriven versus conceptually driven processes. In all experiments, subjects were asked to perform an action when a target item later occurred. When the semantic context changed from encoding to test, prospective memory significantly declined (Experiment 1). When the target event (the item, which in its subsequent appearance in the experiment was the signal to perform the action) was presented as a word (relative to picture presentation, Experiment 2) or was encoded nonsemantically (relative to semantic encoding, Experiment 3), there was a decline in prospective memory performance. Dividing attention during prospective memory retrieval substantially reduced prospective memory performance (Experiment 3). The results of this research indicated that prospective memory is largely conceptually driven, and it behaves more similarly to direct rather than indirect conceptual tests. We suggest that prospective remembering of the type studied here is mediated by a reflexive episodic associative memory system as proposed by Moscovitch (1994). 相似文献
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Benefits to using a reflective journal include developing critical awareness and new perspective, problem-solving skills, and independent learning skills. The training of advanced piano students could be enhanced by the addition of journals to assist with their piano practice, specifically when learning new repertoire. Using the model by Plack and colleagues for developing and assessing reflection in reflective journal entries, we examined the journal entries of 18 advanced piano students to explore the development of reflection over a period of four weeks. Results suggest that reflectively trained piano students develop more critical reflection compared to a control group. Reflectively trained students perceive the same benefits to journaling as their counterparts in other disciplines. The most frequently referenced reflective elements include listing practice strategies and expressing feelings about the learning process. The reflective training model used in this study can be implemented by piano teachers and piano students. 相似文献
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The goal of this research was to determine whether and how people deactivate prospective memory (PM) intentions after they have been completed. One view proposes that PM intentions can be deactivated after completion, such that they no longer come to mind and interfere with current tasks. Another view is that now irrelevant completed PM intentions exhibit persisting activation, and continue to be retrieved. In Experiment 1, participants were given a PM intention embedded within the ongoing task during Phase 1, after which participants were told either that the PM task had been completed or suspended until later. During Phase 2, participants were instructed to perform only the ongoing task and were periodically prompted to report their thoughts. Critically, the PM targets from Phase 1 reappeared in Phase 2. All of our measures, including thoughts reported about the PM task, supported the existence of persisting activation. In Experiment 2, we varied conditions that were expected to mitigate persisting activation. Despite our best attempts to promote deactivation, we found evidence for the persistence of spontaneous retrieval in all groups after intentions were completed. The theoretical and practical implications of this potential dark side to spontaneous retrieval are discussed. 相似文献
38.
Zusammenfassung Das Konzept der Panikstörung ging ursprünglich auf neurobiologische Modellvorstellungen zurück, die rasch von verhaltenstherapeutischen Ansätzen aufgegriffen und differenziert wurden, während die Rezeption durch psychoanalytische Ansätze zurückhaltend erfolgte. In dieser Übersicht werden aktuelle neurobiologische, verhaltenstherapeutische und psychodynamische Modelle dargestellt. Neurobiologische Ansätze beschreiben die zentrale und periphere Fehlsteuerung des Stresshormonsystems. Verhaltenstherapeutische Modelle erklären die Aufrechterhaltung der Störung durch konditionierte Furchtreaktionen, Fehlinterpretation körperlicher Sensationen bzw. dispositionale Angstsensitivität. Neuere psychodynamische Konzepte beschreiben mangelnde Toleranz für intensive Affekte und Trennungserfahrungen aufgrund unsicherer Objektbeziehungsrepäsentanzen als Ursachenfaktoren für Panik. Sie schaffen damit Verbindungen zu tierexperimentellen und neurobiologischen Studien, die die Bedeutung vorzeitiger Trennungserfahrungen für lebenslang erhöhte Stressreagibilität und Furchtsamkeit herausgearbeitet haben. Neurobiologische, verhaltenstherapeutische und psychodynamische Ansätze ergänzen sich beim Verständnis dieses heterogenen Krankheitsbildes. 相似文献
39.
ABSTRACT— An interesting challenge for researchers who study prospective memory is to explain how people recognize environmental events as cues for actions. Whereas some theorists propose that a capacity-consuming monitoring process is the only means by which intentions can be retrieved, we argue that the cognitive system relies on multiple processes, including spontaneous processes that reflexively respond to the presence of target events. We present evidence for the existence of spontaneous retrieval processes and apply the idea of multiple processes to mixed findings on age-related decline in prospective memory. 相似文献
40.
Most models of response time (RT) in elementary cognitive tasks implicitly assume that the speed-accuracy trade-off is continuous: When payoffs or instructions gradually increase the level of speed stress, people are assumed to gradually sacrifice response accuracy in exchange for gradual increases in response speed. This trade-off presumably operates over the entire range from accurate but slow responding to fast but chance-level responding (i.e., guessing). In this article, we challenge the assumption of continuity and propose a phase transition model for RTs and accuracy. Analogous to the fast guess model (Ollman, 1966), our model postulates two modes of processing: a guess mode and a stimulus-controlled mode. From catastrophe theory, we derive two important predictions that allow us to test our model against the fast guess model and against the popular class of sequential sampling models. The first prediction--hysteresis in the transitions between guessing and stimulus-controlled behavior--was confirmed in an experiment that gradually changed the reward for speed versus accuracy. The second prediction--bimodal RT distributions--was confirmed in an experiment that required participants to respond in a way that is intermediate between guessing and accurate responding. 相似文献