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41.
情绪障碍治疗的关键在于消退条件性恐惧记忆,研究证明基于记忆再巩固的提取-消退范式能有效消除或改写原有的恐惧记忆。本研究将提取-消退范式应用到更复杂的恐惧记忆中,采用多感官复合刺激(声音+图片)作为条件刺激,以皮电反应作为恐惧反应指标,考察采用单个线索(声音或图片)、复合线索(声音+图片)进行提取-消退对条件性恐惧记忆的消退效果有何差异。结果表明:声音线索提取-消退组出现了自发恢复和重建效应,图片提取-消退组只出现了重建效应,复合刺激提取-消退组未出现自发恢复和重建效应。说明由复合刺激线索引发的条件性恐惧,采用复合刺激中的单个较强线索或原有完整线索进行提取-消退,对恐惧记忆的消退效果最好。 相似文献
42.
Jeffrey Bloechl 《Metaphilosophy》2005,36(5):730-740
Abstract: This essay interprets and responds to Richard Kearney's metaphysics of possibility and hermeneutics of religion against the background of Nietzsche's proclamation of the death of God and the theodicy problem. Kearney's work is thus read as an interesting but ultimately problematic attempt to preserve or perhaps reinstate religious thought after the modern critique of idols. In addition, his positions are compared and contrasted with some of authors with whom he seems to be in limited agreement (for example, Plotinus, Hillesum) as well as some with whom he clearly breaks (for example, Girard, Sölle). 相似文献
43.
视知觉组织在整体知觉中的作用--脑损伤病人的实验研究 总被引:1,自引:0,他引:1
本实验研究大脑损伤如何影响复合图形的整体知觉。三例病人脑损伤部位分别在大脑枕区、顶区、颞区、额区及基底节和豆状核。复合图形被呈现给病人和正常对照被试。强迫选择识别等任务表明,当空间相邻性决定局部图形的知觉组织时,病人识别整体性质的正确率高于(ZD和FL)或略底于(GK)识别局部性质的正确率;当形状相似性决定局部图形的知觉组织时,病人识别整体性质的正确率显著降低,而识别局部性质的正确率受到的影响较小。在同样的任务中正常被试识别整体和局部性质的正确率受知觉组织因素的影响很小。这些结果提示大脑损伤对整体知觉的破坏可能主要通过影响基于形状相似性的知觉组织实现。 相似文献
44.
Jukka Hyn 《心理与行为研究》2004,2(3):497-504
InthisarticleIsummarizetwolinesofeyemovementresearchthatwehaveconductedoverthepastseveralyearsinFinland.Onelineofre鄄searchdealswithhowcompetentadultreadersi鄄dentifycompoundwordsduringreading.Theotherlineofresearchdealswithhowaspecificreadinggoal(wecallitthereadingperspective)influencesthewayalongexpositorytextisreadandwhatisrememberedofthetext*.Inbothlinesofresearchwehaveappliedtheeyemovementtechniquebyregisteringreaders'eyemovementswhentheyreadsilentlysinglesentencesorlongertextsforcom鄄pr… 相似文献
45.
本实验采用眼动轨迹记录法并结合边界范式(Rayner, 1975),操纵单字词和双字复合词的首字为一致预视或假字预视,考察单字词和复合词预视加工的差异性。另外,通过在中文句子中加入词边界信息——词间阴影,以考察词间阴影对单字词和复合词预视加工的影响。实验结果表明,复合词的预视效应大于单字词,并且词间阴影对单字词和复合词的预视加工均没有显著影响。因此,与印欧语系相比,中文阅读中更大更强的预视效应需从更深层次的语言和认知因素进行探讨。该结果更倾向于支持词切分和词汇识别模型。 相似文献
46.
Japanese bantam hens were trained to discriminate between geometrical figures varying along four integral dimensions. Only
one dimension predicted food: selections of sharp-cornered figures were reinforced, while selections of rounded figures were
not. In experiment 1, hens were subsequently trained to discriminate between nine figure pairs in a simultaneous discrimination
task. Because single pairs contained multiple redundant cues, whereas the relevant dimension was obvious only across stimulus
pairs, the results revealed effects of both generalization and reversal learning. Accordingly, learning speed was enhanced
for later discriminations. Experiment 2 tested the hens’ transfer performance to unknown pairs, following experience of 9
or 18 figure pairs. Four of seven hens showed reliable transfer after experience with 9 figures, but only three showed transfer
after experience with 18 figures, indicating lower transfer with higher number of stimulus pairs learned. In experiment 3,
hens were trained to discriminate 27 figure pairs. Discrimination ratios further decreased and the groups of pairs differed
significantly in their ratios of discrimination. Individual hens’ pecking behaviour was analysed in relation to each dimension
of single figures and in relation to relative differences in the levels of dimensions between paired figures. Hens were shown
to be oriented towards irrelevant information and more towards relational and configurational than elemental and dimensional
aspects. The results are discussed in the biological context of individual recognition in chickens’ dominance hierarchies,
in which we suppose that chickens identify individual flock mates by representation of their visual pattern rather than by
single characteristics.
Received: 18 September 1998 / Accepted after revision: 23 December 1998 相似文献
47.
Development and crossmodal transfer of contextual control of emergent stimulus relations 总被引:5,自引:5,他引:0 下载免费PDF全文
Six normally capable adults first learned three conditional relations in each of two prospective equivalence classes via match-to-sample training with figures as conditional (sample) and discriminative (comparison) stimuli. Then one trained conditional relation in each prospective class was brought under the control of contextual stimuli, two dictated nonsense syllables. Test performances indicated the emergence of untrained conditional relations, and therefore two equivalence classes, that were conditional on the contextual stimuli. These tests involved untrained combinations of contextual stimuli and stimuli in conditional relations, suggesting that the contextual stimuli functioned independently to control conditional relations rather than forming compound stimuli with samples and comparisons in training. Next, two novel figures were made equivalent to each of the original dictated contextual stimuli by match-to-sample training and testing. On subsequent tests, all subjects demonstrated transfer of conditional control of untrained conditional relations from the original auditory contextual stimuli to equivalent visual stimuli. These outcomes further supported the conclusion that the contextual stimuli exerted true conditional control over conditional relations in the equivalence classes and were not merely elements of compound stimuli. 相似文献
48.
Brightness contrast: a reinterpretation of compound cue and combined cue experiments with pigeons. 下载免费PDF全文
A group of three pigeons was trained on a 4-ply multiple schedule: a green color and a vertical line superimposed upon an achromatic background as positive stimuli, and a red color and a horizontal line on an achromatic background as negative stimuli. The pigeons were tested with the vertical line superimposed upon different achromatic background intensities, then with the vertical line superimposed upon different green background intensities, and finally with the vertical line and its training achromatic backgfound attenuated (and unattenuated) by a neutral density filter. The gradients peaked at the luminance of the achromatic background used during training and at the equivalent luminance for the green background when it was substituted for the achromatic background. The brightness contrast, not the background luminance, was the critical variable as the neutral density filter attenuated both the line and the background equally, leaving brightness contrast unchanged; there was no response decrement to this attenuated stimulus. Two other groups of three pigeons showed that they attended to line orientation as well as to brightness contrast. The brightness contrast hypothesis was extended to explain results of attention experiments and combined cue experiments which have used line stimuli in combinations with different backgrounds. 相似文献
49.
The Remote Associates Test (RAT; Mednick, 1962; Mednick & Mednick, 1967) is a commonly employed test of creative convergent thinking. The RAT is scored with a dichotomous scoring, scoring correct answers as 1 and all other answers as 0. Based on recent research into the information processing underlying RAT performance, we argued that the dichotomous scoring may lead to a loss of potentially relevant information. Thus, we proposed an alternate scoring based on semantic similarity between the answer given by the participant and the correct solution using Latent Semantic Analysis (LSA; Landauer & Dumais, 1997). We evaluate the psychometric properties of the alternate LSA scoring and found evidence of construct validity for the LSA scoring which was comparable to findings for the standard scoring, but not better as we would have expected. Thus, our expectations that LSA-based scoring of the RAT counteracts potential information loss were not met. However, LSA based scorings appear to be a promising alternative for hardly solvable RAT items. We conducted additional analyses comparing different RAT item types with regard to their validity as well as evaluating the information uniquely contained in the LSA scoring. Implications of all finding for existing research using RAT items are discussed. 相似文献
50.