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871.
872.
从Schachter的二因素理论和Beck的认知模式观点出发,采用信念量表、广场恐怖认知问卷、躯体感觉问卷、Hamilton焦虑及抑郁量表,以抑郁患者和正常人两组作对照,调查了焦虑患者的焦虑、认知及躯体感觉的相互关系。初步结论是,“躯体损害性”自动想法和对躯体感觉的过分担心是临床焦虑的特征;“社会、行为后果性”想法似乎是焦虑和抑郁患者共有的。焦虑的认知内容是以“危险”为主题的,躯体感觉和认知错解在焦虑发生发展中起重要作用。“危险”的负性自动想法和焦虑关系密切,而由非理性信念所反映的特定的认知图式可能促使患者过度夸大危险性。这一结果在一定程度上支持了两因素理论和Beck的认知模式 相似文献
873.
对变化/分割模型的检验(I) 总被引:9,自引:1,他引:8
用两个实验对变化/分割模型进行了检验。实验1控制目标时距和该时距内的填充数字系列,操纵数字系列的分割段数;实验2控制目标时距内的填充数字系列的间距,操纵目标时距及其中填充数字系列的分割段数,要求被试用再现法和多数估计法分别复制目标时距,并进行立即估计和延迟估计。结果显示:与存储容量模型和加工时间模型相比较,变化/分割模型对时间估计的解释具有更高的预测效度 相似文献
874.
Abstract— If, as we believe, language is a specialization alt the way down to its roots, then perception of its consonantal elements should be immediately phonetic, not as in the conventional view, a secondary translation from percepts of an auditory sort. Supporting observations come from an experiment in which formant transitions that distinguish [da] and [gal were presented as sinusoids and combined with a synthetic syllable made of resonances, thus causing the auditory system to treat these acoustically incoherent parts as different sources Evidence for the source difference was varied by changing the intensity of the sinusoids relative to the remainder of the syllable. Over the greater part of a 60-dB range, listeners accurately identified the consonants, indicating that they had integrated the stimuli according to a coherence that existed only in the phonetic domain. At the lowest intensities, indeed, the consonants were accurately identified, even though the whistles—the normal responses to the sinusoids—were not. There followed then a range over which perception was duplex. Both consonants and whistles were accurately identified At the highest intensities, phonetic integration failed, but accurate perception of the whistles was maintained. That the phonetic percept was present when as auditory counterpart was absent, and vice versa, is evidence that the phonetic percept is independent of its auditory counterpart and not a translation from it, as is the fact that the two percepts followed very different courses in response to the experimental variable. 相似文献
875.
Juan Lupiáñez Emilio G. Milán Francisco J. Tornay Eduardo Madrid Pío Tudela 《Attention, perception & psychophysics》1997,59(8):1241-1254
When a stimulus appears in a previously cued location several hundred milliseconds after the cue, the time required to detect that stimulus is greater than when it appears in an uncued location. This increase in detection time is known as inhibition of return (IOR). It has been suggested that IOR reflects the action of a general attentional mechanism that prevents attention from returning to previously explored loci. At the same time, the robustness of IOR has been recently disputed, given several failures to obtain the effect in tasks requiring discrimination rather than detection. In a series of eight experiments, we evaluated the differences between detection and discrimination tasks with regard to IOR. We found that IOR was consistently obtained with both tasks, although the temporal parameters required to observe IOR were different in detection and discrimination tasks. In our detection task, the effect appeared after a 400-msec delay between cue and target, and was still present after 1,300 msec. In our discrimination task, the effect appeared later and disappeared sooner. The implications of these data for theoretical accounts of IOR are discussed. 相似文献
876.
Wiesenfeld-Hallin Z Aldskogius H Grant G Hao JX Hökfelt T Xu XJ 《The Behavioral and brain sciences》1997,20(3):420-5; discussion 435-513
Injury to the central or peripheral nervous system is often associated with persistent pain. After ischemic injury to the spinal cord, rats develop severe mechanical allodynia-like symptoms, expressed as a pain-like response to innocuous stimuli. In its short-lasting phase the allodynia can be relieved with the gamma-aminobutyric acid (GABA)-B receptor agonist baclofen, which also reverses the hyperexcitability of dorsal horn interneurons to mechanical stimuli. Furthermore, there is a reduction in GABA immunoreactivity in the dorsal horn of allodynic rats. Clinical neuropathic pain of peripheral and central origin often cannot be relieved by opiates at doses that do not cause side effects. The loss of sensitivity to opiates may be associated with the up-regulation of endogenous antiopioid substances, such as the neuropeptide cholecystokinin (CCK). CCK and its receptor (CCK-R) protein is normally not detectable in rat dorsal root ganglion cells. After peripheral nerve section, both CCK and CCK-R are up-regulated in the dorsal root ganglia. Furthermore, CI 988, an antagonist of the CCK-B receptor, chronically coadministered with morphine, reduces autotomy, a behavior that may be a sign of neuropathic pain following peripheral nerve section. Thus, opiate insensitivity may be due to the release of CCK from injured primary afferents. Similarly, in the chronic phase of the spinal ischemic model of central pain, the allodynia-like symptom is not relieved by systemic morphine, but is significantly reversed by the CCK-B antagonist. Consequently, up-regulation of CCK and CCK-R in the CNS may also underlie opiate drug insensitivity following CNS injury. Thus, dysfunction of central inhibition involving GABA and endogenous opioids may be a factor underlying the development of sensory abnormalities and/or pain following injury to neural tissue. 相似文献
877.
RSVP显示方式下影响中文阅读效果的主要因素 总被引:4,自引:1,他引:3
通过二个实验考察了在采用快速序列视觉呈现(RSVP)显示方式时.影响中文阅读效果的二个主要因素,即每次同时呈现的字数和人为的词切分。结果表明.在RSVP显示方式下.中文的阅读理解正确率不受每次同时显示的字数多少或人为词切分的影响,而阅读速度和阅读效率则随每次同时呈现的字数的增加而相应提高;词切分条件下的阅读速度和效率略低于与其字数相当的固定字数显示方式下的阅读速度和效率。 相似文献
878.
879.
本研究观测了30名女性被试在月经周期中的不同激素时相对图像刺激的情绪价值的主观评估和脑诱发电位反应。调节刺激的情绪价值的五类幻灯片分别为普通人像、婴儿像、皮肤病人像、男模特儿像和女模特儿像。实验发现只有脑诱发电位的P3成份随刺激的情绪价值和激素的时相而变化。被评为喜爱与不喜爱的图像(婴儿像和皮肤病人像)所诱发的P3波在幅度上均明显高于中性图像(普通人像)所致的P3反应。在高孕激素时相,对婴儿像和男模特儿像的P3反应高于在低孕激素时相对同类刺激的P3反应。高孕激素时相还伴有对各类图像性感程度评估值的降低。对各类图像喜爱程度的评估则随雌激素水平的上升而增高。上述实验结果表明,P3波敏感于刺激的情绪价值并反映了认知与情绪过程中受生理状态调节的适应性变化。 相似文献
880.
儿童早期工具行为发展的研究 总被引:1,自引:1,他引:0
本研究考察了一岁半到五岁半儿童工具行为发展及其与言语发生和主客体分化的关系。结果表明:使用直接性工具能力的出现几乎与言语发生和主客体分化同步,使用间接性工具的能力则晚出得多,要到三岁至四岁。这意味着:(1)当代人学研究起点应当从“直接工具行为×言语发生×主客体分化”后移。(2)三岁半左右是儿童智力发展超出动物水平的转折期,也是导入间接性工具游戏和训练的最佳年龄。(3)“智力重演说”与“自智人或晚期直立人起人类才有口语”的推测是互相排除的。 相似文献