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Recent evidence from neuropsychology has proven useful in defining neural and cognitive subsystems involved in certain cognitive processes such as spatial attention (Posner, Walker, Friedrich, & Rafal, 1984) and imagery (Farah, 1988; Kosslyn, 1986). In this article we discuss neuropsychological evidence that suggests a modular system is responsible for the organization of parts and wholes by the visual system. We review both normal and neuropsychological evidence that suggest that hierarchical organization of objects within objects involves the coordination of at least four separate subsystems, one that emphasizes the global properties of a figure (association with right posterior superior temporal-parietal regions), one that emphasizes the local properties of a figure (associated with left posterior superior temporal-parietal regions), one that controls the distribution of attentional resources to these subsystems (associated with right or left lateral parietal lobe), and one that interconnects global and local properties and relies on the integrity of posterior temporal-temporal pathways. 相似文献
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Robertson SD 《Journal of motor behavior》2001,33(2):114-126
In 2 experiments, dynamic systems theory predictions concerning intrinsic dynamics and variability of bimanual coordination were examined at different developmental stages. In Experiment 1, ten 4-, 6-, 7-, 8-, and 10-year-old children and adults performed unimanual dominant, unimanual nondominant, and bimanual continuous circle drawing. All tasks were performed at the participants' preferred rate, size, and mode of coordination. The 4-, 6-, and 7-year-old children produced larger circles with longer durations than those of the 8- and 10-year-olds and the adults. That finding demonstrates that younger children display different intrinsic dynamics than older children and adults. The 4-, 6-, and 7-year-old children also displayed more variability in bimanual coordination (more time in less stable patterns of coordination, higher standard deviation in relative phase) and produced more transitions between coordination patterns than the 8- and 10-year-olds and the adults. In Experiment 2, the same participants performed bimanual circles at increasing rates. Consistent with predictions of the HKB model (H. Haken, J. A. S. Kelso, & H. Bunz, 1985), the number of transitions decreased as speed increased. Some support was found for the notion that age-related variables of attention and rate contribute to the increased variability in young children's bimanual coordination. 相似文献
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Anatomical, physiological, and behavioral studies provide support for separate object- and location-based components of visual attention. Although studies of object-based components have usually involved voluntary attention, more recent evidence has suggested that objects may play an independent role in reflexive exogenous orienting, at least at long stimulus onset asynchronies (SOAs). In the present experiments, the role of objects in reflexive attentional orienting was investigated by developing a task in which location and object cuing could be separately examined for both short and long SOAs. Typical location cuing effects were obtained, indicating facilitation at short cue-target intervals and inhibition of return (IOR) at longer intervals. In contrast, object cuing resulted in facilitation for cued objects at long cue-target intervals and no object-based IOR. Interestingly, object cuing primarily affected targets at cued locations, and not those at uncued locations. Together, the experiments examine the interactive nature of objects and locations in exogenous orienting and seem most consistent with a location-mediated view of object-based orienting. 相似文献
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Russ Curtis Phyllis Robertson Amy Forst Caroline Bradford 《Counselling and Psychotherapy Research》2007,7(4):203-210
Purpose: Postpartum mood disorders (PMDs), the distressing mental and emotional symptoms experienced by women after childbirth, are just now receiving the attention they warrant. Given the serious and sometimes life‐threatening nature of PMDs, we used a qualitative research design to examine more closely the nature of symptoms experienced and the effective strategies women used to cope with PMD. Participants: The respondents were 252 members of PMD and breast‐feeding (La Leche League) support groups throughout the United States. Method: Participants responded anonymously to open‐ended questions in an online survey. The data were reviewed by the research team to determine common themes and prevailing issues. Results: Participants reported myriad different symptoms and used a host of various strategies to alleviate problematic thoughts, feelings, and behaviours following childbirth. Postpartum symptoms affected participants’ plans to have future children. For some women, symptoms became more intense during subsequent births. Despite the problematic nature of PMD, more than half of the participants reported receiving little or no information from healthcare providers about PMDs. Implications for counsellors and other healthcare providers are discussed in detail. 相似文献