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个体对行为后反馈结果的加工在学习和环境适应方面有重要意义,工作记忆负荷(working memory load,WM load)如何影响反馈加工过程尚不清楚。采用双任务范式,设置基线、低WM load、高WM load三种条件,结合ERP技术对这一问题进行探究。发现RewP (reward positivity,奖赏正波)对效价敏感,而不受WM load条件影响;Theta震荡的正、负反馈差异波在高WMload条件下比在低WM load条件下小。结果支持等级强化学习-前扣带回理论(HRL-ACC, hierarchical reinforcement learning theory of anterior cingulate cortex)对于RewP和theta震荡的观点:RewP反映了反馈效价评估功能, theta震荡反映了认知控制功能,并且WM load选择性影响了ACC的认知控制功能而不是反馈效价评估功能。 相似文献
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REN FLINCH MIDTGAARD 《Journal of applied philosophy》2007,24(3):299-315
abstract The paper considers what (if anything) can justify that a utopian community or a micro‐society makes an exception to the general rules of society for itself. The discussion evolves around the Danish case of Christiania. Three moral theories, to wit Kantian constructivism, rule‐consequentialism and act‐consequentialism, are applied to the case at hand. The aim is to test whether the exceptions in question are unjust or in other ways morally problematic. The two former theories appear to deny the justice of Christiania. The relevant exceptions are unacceptable according to those two moral perspectives. Act‐consequentialism, however, seems to endorse the case of Christiania, including the exceptions pertaining to it. While the latter theory is often thought to conflict with widely shared reflective moral convictions, in this case it might square with at least an important pragmatic layer of Danish public culture. 相似文献
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实体恶性肿瘤固有的侵袭性生物学行为决定了其自身生长过程,也是周围组织脏器受侵润的过程.体积较大的盆腔实体肿瘤其切除范围常涉及多个学科领域,手术操作具有一定的难度及复杂性,术中易大出血,术后并发症较多,死亡率高.遇到这种需要盆腔肿瘤联合脏器的情况下,很多医生因该手术的难度及风险放弃切除,但是有研究显示,切除后能够明显改善患者的生存情况.如果能掌握该类手术切除的策略及相对应的技战术应用,相当多的盆腔巨大肿瘤可以达到R0切除.笔者结合自己近几年根治性切除68例盆腔肿瘤,浅谈腹盆腔肿瘤联合脏器切除策略及应用战术. 相似文献
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Xing‐Jie Chen Lu‐Lu Liu Ya Wang Tian‐Xiao Yang Jia Huang Ke Li Ya‐Wei Zeng Eric F.C. Cheung David H.K. Shum Therese van Amelsvoort Raymond C.K. Chan 《PsyCh Journal》2019,8(2):261-270
Prospective memory (PM) refers to the ability to remember to do something in the future. Implementation intention refers to a self‐regulatory strategy in the form of “If …, then …” planning that can improve PM performance. However, the neural basis of the effect of implementation intention on PM remains unclear, as do the phases of PM that are affected by implementation intention. This study aimed to address these issues. Healthy participants were randomly assigned to the implementation intention (n = 18) and typical instruction (n = 20) conditions. All of them underwent functional magnetic resonance imaging (fMRI) scanning when performing a PM task, which differentiated encoding, maintenance, and execution phases. Results demonstrated that participants in the implementation intention group showed different brain activations compared to participants in the typical instruction group. During the encoding phase, the implementation intention group showed increased activations in the inferior frontal gyrus (BA 10) and supramarginal gyrus (BA 40) compared to the typical instruction group; during the maintenance phase, the typical instruction group showed stronger activations in the inferior frontal gyrus (BA 46) than the implementation intention group; during the execution phase, the typical instruction group showed increased activations in the precentral gyrus (BA 6) and middle frontal gyrus (BA 8) than the implementation intention group. These results demonstrated the neural correlates of implementation intention on PM in different phases, and support the conclusion of our previous review based on fMRI evidence that implementation intention's improvement of PM performance is not fully automatic. 相似文献
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Ke Zhang Dingguo Gao Jiehui Qian 《British journal of psychology (London, England : 1953)》2021,112(1):230-246
Depth perception is essential for effective interaction with the environment. Although the accuracy of depth perception has been studied extensively, it is unclear how accurate the depth information is stored in working memory. In this study, we investigated the accuracy and systematic biases of depth representation by a delayed estimation task. The memory array consisted of items presented at various stereoscopic depth positions, and the participants were instructed to estimate the depth position of one target item after a retention interval. We examined the effect of spatial configuration by comparing the memory performance in the whole-display condition where non-target memory items were present during retrieval with that in the single-display condition where non-target memory items were absent. In the single-display condition, we found an overestimation bias that the depth estimates were farther than the corresponding depth positions defined by disparity, and a contraction bias that the stored depth positions near the observer were overestimated and those far from the observer were underestimated. The magnitude of these biases increased with the number of to-be-stored items. However, in the whole-display condition, the overestimation bias was corrected and the contraction bias did not increase with the number of to-be-stored items. Our findings suggested that the number of to-be-stored items could affect the accuracy of depth working memory, and its effect depended crucially on whether the information of spatial configuration of memory display was available at the retrieval stage. 相似文献
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Tony Xing Tan Zhiyao Yi Zhengjie Li Ke Cheng Jun Li 《International journal of psychology》2021,56(2):286-295
In this article, we used results from two studies to show the need to go beyond linguistic equivalence to establish construct validity and measurement invariance in cross-cultural research. Study 1 examined Rosenberg Self-Esteem (RSE; 10 items) data from 156 Mainland Chinese youth (M = 13.8 years, SD = .53) and 213 Chinese-American youth (M = 13.6 years, SD = 2.1) from high socioeconomic status (SES) families. The Chinese translation of the RSE has been widely used. Study 2 included 1060 Mainland Chinese youth (M = 15.6 years, SD = 2.3) and 412 racially diverse American youth (M = 16.0, SD = 2.9) from all SES backgrounds. Data were collected with the third and newest edition of the Behavioural Assessment System for Children-Self Report of Personality (BASC-3-SRP; 189 items). We translated and back-translated the BASC-3-SRP between English and Chinese to establish linguistic equivalence. All participants were females. Study 1 showed that the RSE had acceptable internal consistency but lacked construct validity. Study 2 showed that the original and the translated BASC-3-SRP had good internal consistency and construct validity, but nine of its 16 subscales lacked measurement invariance. These results highlight measurement issues facing international and cross-cultural research. 相似文献
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Zijun Ke Zhiyong Zhang 《The British journal of mathematical and statistical psychology》2018,71(1):96-116
Autocorrelation and partial autocorrelation, which provide a mathematical tool to understand repeating patterns in time series data, are often used to facilitate the identification of model orders of time series models (e.g., moving average and autoregressive models). Asymptotic methods for testing autocorrelation and partial autocorrelation such as the 1/T approximation method and the Bartlett's formula method may fail in finite samples and are vulnerable to non-normality. Resampling techniques such as the moving block bootstrap and the surrogate data method are competitive alternatives. In this study, we use a Monte Carlo simulation study and a real data example to compare asymptotic methods with the aforementioned resampling techniques. For each resampling technique, we consider both the percentile method and the bias-corrected and accelerated method for interval construction. Simulation results show that the surrogate data method with percentile intervals yields better performance than the other methods. An R package pautocorr is used to carry out tests evaluated in this study. 相似文献