疼痛表征在自我和他人间的一致性效应

在以往研究中“pain matrix”被认为是加工自我和他人疼痛信息的特异性神经机制, 也可能是个体对他人疼痛共情的原因。但是最近的研究发现非疼痛的感觉刺激也能激活该脑区, 因此疼痛表征在自我和他人间是否存在一致性受到质疑。研究采用启动范式从两个方面入手探索自身疼痛和疼痛共情间是否存在一致性关系。实验一使用疼痛和非疼痛图片为启动刺激, 疼痛或热刺激为靶刺激, 发现相对于非疼痛图片, 疼痛图片启动下被试对自身疼痛刺激的反应时减少, 疼痛水平和情绪反应增强。实验二使用疼痛和热刺激为启动刺激, 疼痛或非疼痛图片为靶刺激, 发现相对于热刺激, 疼痛刺激启动下被试对疼痛图片的反应时减少。同时, 在两个实验中非疼痛的靶刺激都不受启动刺激的影响。这说明疼痛表征在自我和他人间存在一致性效应。     

内隐社会认知:印象形成的启动效应研究

本文以社会认知为出发点,考察印象形成的内隐社会认知问题,它采用性质不同的成语作为实验材料,并操纵启动刺激的结构,通过两个实验,１８０名被试（大学一年级学生）,探讨了印象形成的启动效应,结果发现：１．事先呈现的积极或消极成语对随后的印象形成产生正或负的启动效应,且启动效应不受加工深度的影响;２．印象形成的启动效应研究可以作为内隐社会认知研究的一条有效途径。     

长时语义记忆对阈下语义启动效应的影响

本文通过检测启动刺激的词频对阈下启动效应的影响,探讨了长时语义记忆在阈下语义启动中的作用。结果表明,对阈下启动刺激的感受性d′上,词频和练习的交互作用显著(p<0.05),高频刺激即使没有练习过的启动刺激也会产生启动效应,而对低频刺激只有练习过的启动刺激才会产生启动效应,说明长时语义记忆是影响阈下启动效应的重要因素之一。     

社会认知中印象形成的启动效应研究:频因,近因效应

本文以社会认知为出发点,考察印象形成的启动效应,它采用性质不同的成语作为实验材料,并操纵启动刺激的结构,系统探讨了印象形成的启动效应中原因与近因效应,结果发现：当呈现表示同一品质但性质相反的成语时,如果启动刺激和目标刺激之间不延迟,则近因在启动效应中起作用,但在延迟情况下,频因在启动效应中占优势;同时随着延迟的出现,启动效应明显变小。实验结果支持启动效应的突触模式说;     

构词法对无意识加工的影响:中德数字启动效应的比较研究

本文采用客观觉察阈值作为启动刺激呈现时间、以数字(阿拉伯数字)和数词(以中、德两种文字写出的数词)为刺激比较研究了在掩蔽刺激条件下中国与德国被试的启动效应.结果表明:1)中国被试的启动效应显著,在德国被试中未发现显著的启动效应;2)除数字—数字刺激组外,中国被试的启动效应显著地大于德国被试;3)中国被试的数词—数字刺激组比其他三个刺激组产生的启动效应大。我们从无意识加工特征、构词法的差异以及并行—连续加工理论的观点对上述结果分别进行了讨论.     

任务定势对自动语义激活过程调节作用的ERP研究

摘要：本研究致力于探讨自上而下的因素对自动加工的影响。选取的自上而下因素为任务定势,自动加工过程为自动语义激活过程。研究采用ERPs技术,中文词汇为刺激,利用掩蔽启动范式,采用反应时和N400为指标。实验任务有三个：对问号后出现的词进行生物/非生物的词汇分类判断;对圆圈后出现的词进行是否含上下结构的字的词汇结构判断;对带“*”的词进行真词/假词判断。研究发现先前完成的任务形成的任务定势会对随后的自动语义激活过程产生调节作用：在词汇分类判断任务后,掩蔽启动刺激对靶刺激产生启动效应。在词汇结构判断任务后,掩蔽启动刺激对靶刺激没产生显著的启动效应。     

目标刺激的熟悉度和呈现角度对情绪启动的影响

本研究初步考察目标刺激的熟悉度和呈现角度对情绪启动的影响。研究采用女性面孔图片作为实验材料,随机选取30名大学生被试进行实验,采用重复测量方差分析对数据进行统计分析。结果发现:当目标刺激为熟悉图片时,出现了情绪启动效应;当目标刺激为不熟悉的图片时,未发现情绪启动效应;目标刺激的呈现角度对情绪启动效应没有影响。     

记忆编码中目标与背景的情绪一致性对记忆提取的影响

摘 要 本研究将经典情绪启动范式和学习-再认范式相结合,探讨学习时启动与目标的情绪一致性对目标再认的影响。在记忆编码阶段,以情绪面孔图片为启动刺激、一般情绪图片为目标刺激,要求被试对目标图片的效价进行判断;在提取阶段向被试呈现一般情绪图片,要求被试判断是否在前一阶段见过。结果表明,编码阶段的加工背景对记忆提取产生了显著影响。一致启动促进了认知加工与记忆编码,提高了再认正确率。ERP结果也表明,在目标刺激呈现后300-500ms,编码时的情绪一致性对再认阶段消极目标诱发的ERP产生了显著影响。     

基于客体的一致性效应的产生机制

采用具有不同深度信息的剪影和图片刺激为材料,要求被试完成形状判断任务,探究基于客体的一致性效应的产生机制。实验1中客体刺激呈现于屏幕中央位置;实验2进一步增强了刺激空间呈现的左右位置倾向;实验3则通过交叉手的范式分离了反应位置和反应手不同的编码对一致性效应的作用。结果发现:当刺激不存在显著的左右位置信息时,剪影刺激出现了一致性效应,图片则没有;而当刺激的空间位置信息显著时,剪影和图片均出现了一致性效应,这一效应在反应位置和反应手编码分离后仍然存在。因此得出结论:空间位置编码假说对解释基于客体的一致性效应的产生有重要作用。     

知觉与表象过程中不同线索表情的启动效应研究

探讨情绪性面孔的知觉和表象过程中,不同类型线索表情的启动效应,并关注不同类型表情表象难易的差异。选取NimStim数据库中20位演员的愉快、愤怒和中性表情作为启动刺激,随后呈现同一演员不同表情的图片,或通过颜色提示被试对不同表情进行表象,并同时进行表情类型判断。研究发现,情绪性面孔知觉与表象任务中均存在启动效应,之前呈现的线索面孔将会对接下来呈现的相同效价的面孔产生启动效应,对相反效价及中性面孔产生抑制; 在平衡不同类型面孔可能存在的启动效应后,正性、负性及中性表情是同样易于表象的。     

The effects of safer-sex stories on college students' attitudes toward condoms

Social learning theory predicts that reading non-erotic stories involving condom use will be as effective as reading erotic stories with condom use in producing positive attitudes toward condoms. Werner's orthogenetic principle, however, predicts that reading erotic condom stories will be most effective because of the link created between sexual arousal and cognitive information about condoms. 168 male and 149 female undergraduates enrolled in Introductory Psychology at a small, private, southern university participated in a study to test the validity of these two theories. The students read one of the following types of stories: erotic with condom placement described, erotic without condom use, or non-erotic with a model for discussing condoms. The men and women who read the non-erotic stories were most positive about condoms and reported the strongest intentions to use condoms in the future. These findings suggest that erotica is not necessary to produce positive attitudes toward condoms.     

Phallometric diagnosis with 'nonadmitters'

The phallometric method of assessing erotic value of presented stimuli has two main tasks, one is in the breaking down of complex (potentially) sexual stimuli into components, the other is in diagnosing anomalous erotic preferences in ‘Nonadmitters’, i.e. in persons whose behaviour would imply there is such an anomaly, but who deny its presence. Differentiation between Admitters and Nonadmitters was attained by two verbal Admitter scales. Comparison of the scores on these scales with results of phallometric assessment showed (by mutual validation) that the phallometric method diagnoses Admitters more accurately than Nonadmitters. After that, the validity was tested of a new mode of the phallometric method, designed for diagnosing pedo- or hebephilia in Nonadmitters. In cases of homosexual pedophilia or hebephilia (but not in the heterosexual cases) the new Nonadmitter mode was superior to the Standard procedure.     

Negative priming and perceptual fluency: More than what meets the eye

In two priming experiments, we manipulated the perceptual quality of the target or the distractor on the prime trial; the stimuli were repeated or novel. Negative priming was found to be contingent on stimulus repetition, because it was obtained with repeated items but not with novel items. Prime trial perceptual degradation modulated negative priming for repeated items but had no effect on priming in ignored repetition conditions using novel stimuli. These patterns were obtained even when the effect of perceptual degradation was (1) greater than the effect of stimulus repetition and (2) greater for novel words than for repeated words. Although stimulus repetition increases perceptual fluency, the activation of perceptual representations by itself is not sufficient to produce negative priming. Instead, we suggest that negative priming is a manifestation of an activation-sensitive inhibitory mechanism that functions to reduce response competition.     

Negative priming and perceptual fluency: more than what meets the eye

In two priming experiments, we manipulated the perceptual quality of the target or the distractor on the prime trial; the stimuli were repeated or novel. Negative priming was found to be contingent on stimulus repetition, because it was obtained with repeated items but not with novel items. Prime trial perceptual degradation modulated negative priming for repeated items but had no effect on priming in ignored repetition conditions using novel stimuli. These patterns were obtained even when the effect of perceptual degradation was (1) greater than the effect of stimulus repetition and (2) greater for novel words than for repeated words. Although stimulus repetition increases perceptual fluency, the activation of perceptual representations by itself is not sufficient to produce negative priming. Instead, we suggest that negative priming is a manifestation of an activation-sensitive inhibitory mechanism that functions to reduce response competition.     

Erotic stimuli and aggression: facilitation or inhibition.

The present experiment attempted to reconcile previous results on the relationship of erotic stimuli and aggression. Subjects were either insulted or not insulted prior or subsequent to observing erotic stimuli of varying levels of arousal inducements. It was found, in support of prior research, that mildly erotic stimuli had an inhibiting effect on aggression when viewed subsequent to anger arousal, whereas highly erotic stimuli tended to maintain aggression at a level similar to nonerotic exposure. Prior viewing of erotic stimuli, however, had a facilitative effect on aggressive behavior. It was proposed that erotic stimuli have two components (arousal and attentional shift) that interact with anger arousal to either inhibit or facilitate aggressive behavior. The article considers the implications of this two-component system for future research on erotic and aggressive stimuli.     

单一启动单一探测中基于相关低比例的负启动效应

启动和探测刺激相同试次低比例时可出现类似负启动的抑制现象。本研究采用不同于以往研究的单一探测范式,并操纵相关项（启动与探测词语义相关）的比例及刺激集的大小研究这一抑制机制的特点。实验一在低比例时发现了显著的负启动效应。实验二在低比例时,发现小的刺激集能诱发负启动,而大的则不能。表明在单一探测范式中启动与探测相关试次的低比例确实能诱发抑制控制,该抑制控制由忽视策略所致,并受刺激集大小的影响,支持了干扰项的凸显能够诱发强抑制的观点。     

When sex primes love: subliminal sexual priming motivates relationship goal pursuit

The studies reported here provide, for the first time, experimental evidence to support the claim that sexual interest and arousal are associated with motives to form and maintain a close relationship. In five studies, sex-related representations were cognitively primed, either subliminally or supraliminally, by exposing participants to erotic words or pictures as compared with neutral words or pictures. The effects of "sexual priming" on the tendencies to initiate and maintain a close relationship were assessed using various cognitive-behavioral and self-report measures. Supporting the hypotheses, subliminal but not supraliminal exposure to sexual primes increased (a) willingness to self-disclose, (b) accessibility of intimacy-related thoughts, (c) willingness to sacrifice for one's partner, and (d) preference for using positive conflict-resolution strategies. The article discusses implications of these findings for the role of sex in close relationships and offers a conceptualization of possible relational motives of the sexual behavioral system.     

Excitation and hedonic valence in the effect of erotica on motivated Intermale aggression

The excitatory potential (low, high), the hedonic valence (negative, positive), and the type of content (erotic, non-erotic) of visual stimuli were varied in a factorial design. Male subjects were provoked by a same-sex peer, exposed to communication or, in a no-exposure control, made to wait for a period of time equal to that of communication exposure, and then provided with an opportunity to retaliate against their annoyer. High excitatory potential and negative hedonic valence were found to combine additively in a facilitative effect on retaliatory aggression. No appreciable differences were found in the effect of excitationally and hedonically matched erotica and non-erotica. Exposure to either arousing and displeasing erotica or non-erotica produced levels of aggression significantly above the level associated with the no-exposure control. Exposure to comparatively non-arousing and pleasing erotica or non-erotica failed to reduce aggression, however. The findings were considered to support a model that projects the effect of erotica on retaliatory aggression as a joint function of their excitatory potential and their hedonic valence.     

Linking sight and sound: fMRI evidence of primary auditory cortex activation during visual word recognition

We describe two studies that used repetition priming paradigms to investigate brain activity during the reading of single words. Functional magnetic resonance images were collected during a visual lexical decision task in which nonword stimuli were manipulated with regard to phonological properties and compared to genuine English words. We observed a region in left-hemisphere primary auditory cortex linked to a repetition priming effect. The priming effect activity was observed only for stimuli that sound like known words; moreover, this region was sensitive to strategic task differences. Thus, a brain region involved in the most basic aspects of auditory processing appears to be engaged in reading even when there is no environmental oral or auditory component.     

Faster might not be better: Pictures may not elicit a stronger unconscious priming effect than words when modulated by semantic similarity

It has been suggested that unconscious semantic processing is stimulus-dependent, and that pictures might have privileged access to semantic content. Those findings led to the hypothesis that unconscious semantic priming effect for pictorial stimuli would be stronger as compared to verbal stimuli. This effect was tested on pictures and words by manipulating the semantic similarity between the prime and target stimuli. Participants performed a masked priming categorization task for either words or pictures with three semantic similarity conditions: strongly similar, weakly similar, and non-similar. Significant differences in reaction times were only found between strongly similar and non-similar and between weakly similar and non-similar, for both pictures and words, with faster overall responses for pictures as compared to words. Nevertheless, pictures showed no superior priming effect over words. This could suggest the hypothesis that even though semantic processing is faster for pictures, this does not imply a stronger unconscious priming effect.