刻板印象激活的无意图性及其大脑神经活动特征

采用启动Stroop范式, 对刻板印象激活的无意图性及其大脑神经活动特征进行了探讨。操纵了启动和“无启动”条件以及与启动所激活的刻板印象一致、冲突和无关的3类靶子词, 记录了36名大学生被试对靶子词进行颜色判别的行为反应和脑电图(EEG, electroencephalogram)。结果发现：(1)“无启动”条件下对3类靶子的反应时基本一致; 启动条件下对一致靶子做出颜色判别的反应时显著快于对冲突靶子的, 对无关靶子的反应时介于两者之间。(2)“无启动”条件下无关靶子诱发的N400波幅最大--显著大于一致和冲突靶子诱发的, 后两者诱发的N400无差异; 启动条件下一致靶子诱发的N400波幅显著小于冲突和无关靶子诱发的N400波幅, 无关靶子诱发的N400波幅也小于冲突靶子诱发的N400波幅。这表明刻板印象激活是一个发生在知觉后加工阶段的具有无意图性的自动化加工过程, 刻板印象激活效应具有抑制冲突信息加工同时促进一致信息加工的“双刃剑”模式, N400可以作为考察这一认知过程特征的电生理学指标。     

性别刻板印象表征的形式及神经基础

本实验采用ERP技术,考察性别刻板印象的表征。结果发现,无论启动是上位范畴、子范畴、典型样例还是反例,被试对于刻板印象不一致的表征比一致的表征均诱发了波幅更大的N400,反应时更长。并且,被试对于性别刻板印象的表征存在层级差异。研究结果表明：（1）性别刻板印象的表征存在层级结构。（2）语义启动下,性别刻板印象违背诱发N400效应。（3）性别刻板印象表征存在自上而下的由大脑额叶进行的语义分类加工。     

语义性别刻板印象对注意返回抑制的影响——来自行为和ERP的证据

采用ERP技术,以线索提示任务检验了性别刻板印象在返回抑制下的激活过程.实验以性别特征词为线索刺激,性别范畴词为目标刺激,要求被试忽略线索与目标语义仅对目标空间位置做出判断.反应时和ERP显示,线索化条件下刻板语义激活对位置判断产生显著影响,体现为女性刻板语义冲突增强了返回抑制.但非线索化条件下未观察到任何效应.实验结果表明,特定任务下性别刻板印象能够诱发注意偏向,但此过程易受注意线索影响,显示其有条件性.     

数学-性别刻板印象对女生的威胁效应:场认知风格的调节作用

旨在检验数学-性别刻板印象是否对我国高中女生产生威胁效应,并探讨场认知风格在数学-性别刻板印象威胁效应中是否存在调节作用。研究发现,女生在激活数学-性别刻板印象情境下的工作记忆容量显著低于在非激活情境下的工作记忆容量;认知风格和测验情境之间交互效应显著,场依存个体激活情境下的工作记忆容量显著低于非激活情境下的,场独立个体两种情境下相差不显著。说明数学-性别刻板印象给女生带来了威胁;认知风格调节着数学-性别刻板印象威胁效应的强弱,场依存个体受到的威胁很大,场独立个体几乎不受威胁。     

印象形成中交叉刻板印象的加工机制

以大学生作为被试,旨在探究：在交叉刻板印象加工过程中,是否存在某一单维刻板印象的加工优势效应？如果存在,靶子熟悉度的差异是否会影响单维刻板印象的加工优势效应？该单维刻板印象加工优势效应是否还会受到其他单维刻板印象加工的调节。研究结果表明：（1）在对具有性别-年龄组合而成的交叉刻板印象的人群进行判断时,通过面孔进行启动,发现在不同的条件下分别存在性别单维刻板印象和年龄单维刻板印象的加工优势效应,即年轻男性或女性面孔的性别特征较年龄特征更容易得到加工和提取,老年男性或女性面孔的年龄特征较性别特征更具有加工优势。而在范畴词汇启动下,老年男性或女性词汇启动下的年龄特征较性别特征更具有加工优势。（2）熟悉性会影响单维刻板印象的加工优势,即在年轻被试感知面孔或范畴词汇时,其对老年男性或女性靶子间击中率的差异要显著大于对年轻男性或女性的靶子间击中率的差异。换言之,年轻被试感知老年人靶子的性别与年龄间的差异要显著大于年轻人靶子,出现自我参照现象。（3）在交叉刻板印象加工中,同时存在的各类单维刻板印象加工是彼此削弱的,具有优势加工效应的刻板印象的加工会受到非优势刻板印象加工的抑制。（4）在交叉刻板印象加工中,优势刻板印象加工会受到其相对刻板印象加工的削弱。     

情感一致性对刻板印象激活的影响

情感一致性是指情感具身反应(情感感受、表情及情感的相关身体动作等)和情感认知评价(情感观念性内容,积极或消极)在效价层面上的耦合关系。实验以89名大学生为被试,考察了情感一致性对(性别)刻板印象的影响。实验通过音乐启动相应的情感感受(积极或消极)操纵情感具身反应,采用快速组句任务启动相应的情感信念(积极或消极)操纵情感认知评价,89名被试被随机分配到四种实验条件下,最后所有被试参与(性别)刻板印象IAT测验。结果发现:情感不一致条件促进(性别)刻板印象激活;情感一致性没有导致流畅性的变化;情感感受调节了消极阈下情感信念对刻板印象激活的作用。     

关于性别刻板印象的初步调查

性别刻板印象是一种重要的社会刻板印象。我们在 3 80名大学生中作了性别刻板印象的初步调查 ,并考察了性别和性别角色对性别刻板印象的影响。结果发现中国大学生的性别刻板印象与传统的性别观念比较一致 ,认为男性更坚强能干 ,女性更被动顺从 ,且这一印象不因性别和性别角色而改变。但男女被试的性别刻板印象仍存在明显差异。不同性别角色被试之间的性别刻板印象也有差异。总体而言 ,性别对性别刻板印象的影响比性别角色对性别刻板印象的影响大。     

刻板印象的意识性抑制

通过实验探讨了刻板印象的意识性抑制问题。被试为西北师范大学一年级本科生24人。结果表明：(1)性别刻板印象会影响对职业这种社会范畴的判断;(2）刻板印象效应比较顽固,较难受到意识性的抑制;（3）与刻板印象相反的个体化信息会削弱刻板印象效应;(4）刻板印象与个体化信息的加工很可能是平行的。     

阅读理解中的代词加工:先行词的距离与性别刻板印象的作用

采用眼动技术,本研究探讨了阅读理解中代词的加工机制.读者阅读包含代词的文本,代词的性别与先行词的性别刻板印象一致或违背,同时其和先行词间的距离或远或近,记录被试阅读文本的眼动轨迹.结果发现,与一致条件相比,违背条件的加工时间更长.当代词和先行词间距离较近时,一致性效应在关键代词区的反映早期加工的眼动指标上即出现,而当二者间距离较远时,一致性效应在更后的位置(代词后那一区域)出现,并且只出现在反映晚期加工的眼动指标上.此外,与远距离一致条件相比,近距离一致条件下代词后那一区域的阅读时间更长.上述结果表明,性别刻板印象以及距离在代词加工皆发挥重要作用,而且性别刻板印象产生的影响在时程上因距离的不同而不同.这一结果在一定程度上为语言理解的交互作用理论提供了证据.     

社会信息归类过程中刻板印象的内隐效应

采用信号检测论和间接测量方法探讨社会信息归类过程中的刻板印象内隐效应。实验结果表明 :⑴范畴启动可以自动激活有关的刻板印象内容 ,说明在很大程度上刻板印象是归类过程的一种必然结果与产物 ;⑵那些在内容上与范畴启动所导致自动的刻板印象激活及其相关内容一致、不一致或相反的建构分别易于出现同化与对比效应 ;⑶在个体水平上 ,通过意识性抑制在短期内很难压制刻板印象的自动激活 ,这表明刻板印象加工在很大程度上涉及到内隐过程     

Scent marking by male dwarf hamsters (Phodopus sungorus campbelli) in response to conspecific odors

Male hamsters (Phodopus sungorus campbelli) scent marked at greater frequencies in the presence of conspecific odor, either male or female, than in clean areas. Marking rates were not different between male and female odor conditions. In contrast, the pattern of investigation in response to conspecific odor did differ between the male and the female odor conditions. When male odors were used as stimuli, investigative sniffing increased at the scent marking sites but when female odors were used as stimuli investigative sniffing increased throughout the arena. Thus, male dwarf hamsters direct their scent marks at both male and female conspecifics, discriminate between male and female odor, and investigate in a different manner areas scent marked by males and females.     

Sources of male chauvinism in the TAT

Potential sources of antifemale bias in TAT stimuli were evaluated by having 358 undergraduate subjects rate 17 male and 17 female TAT figures on 7-point anchored scales. Data from the five independent rating conditions were examined by 2 x 2 ANOVA. Biases toward greater Mental Health and Intelligence for female figures were seen to be insufficient counterbalancers of biases toward greater Cultural Favorability and Identification for male figures. Achievement status was rated equivalently. TAT stimuli appeared to show a "built in" source of male chauvinism systematically "pulling" male-sex identification. Potential for unfavorable clinical evaluation was seen to be greater for female TAT subjects compared with male subjects.     

A sex difference in the specificity of sexual arousal

Sexual arousal is category-specific in men; heterosexual men are more aroused by female than by male sexual stimuli, whereas homosexual men show the opposite pattern. There is reason to believe that female sexual arousal is organized differently. We assessed genital and subjective sexual arousal to male and female sexual stimuli in women, men, and postoperative male-to-female transsexuals. In contrast to men, women showed little category specificity on either the genital or the subjective measure. Both heterosexual and homosexual women experienced strong genital arousal to both male and female sexual stimuli. Transsexuals showed a category-specific pattern, demonstrating that category specificity can be detected in the neovagina using a photoplethysmographic measure of female genital sexual arousal. In a second study, we showed that our results for females are unlikely to be explained by ascertainment biases. These findings suggest that sexual arousal patterns play fundamentally different roles in male and female sexuality.     

Gender expectations for alcohol use: A study of the significance of the masculine role

One hundred sixteen undergraduates assigned traditional gender-stereotyping adjectives and adjective phrases to two male and two female stimuli. Included in this set of traits were statements regarding drinking beer, drinking wine, and getting drunk. Results indicated that male stimuli were attributed stereotypically masculine traits (e.g., acts as a leader, is willing to take risks), and were attributed both beer drinking and getting drunk significantly more often than the female stimuli. By contrast, female stimuli were attributed stereotypically feminine traits (e.g., dependent, sensitive) and were attributed wine drinking significantly more often than the male stimuli. These data provide direct evidence that expectations regarding beer drinking and getting drunk are aspects of the traditional male gender role. The social and mental health implications of the findings are discussed.     

Color Associations of Male and Female Fourth-Grade School Children

Four groups (two male and two female) were asked to respond to a number of concepts with the first color that came to mind. Results led to the following conclusions: (a) We replicated Byrnes' (1983) findings that indicated that there is a definite color association among children to stimuli; (b) there was no significant difference between the responses of the male children and those of the female children; (c) two opposing findings concerning the perceived valence of colors were both supported by the data; and (d) we found mat emotionally loaded stimuli evoked similar responses from males and females, whereas neutral stimuli elicited different responses.     

Color associations of male and female fourth-grade school children

Four groups (two male and two female) were asked to respond to a number of concepts with the first color that came to mind. Results led to the following conclusions: (a) We replicated Byrnes' (1983) findings that indicated that there is a definite color association among children to stimuli; (b) there was no significant difference between the responses of the male children and those of the female children; (c) two opposing findings concerning the perceived valence of colors were both supported by the data; and (d) we found that emotionally loaded stimuli evoked similar responses from males and females, whereas neutral stimuli elicited different responses.     

The transfer of contextual control over equivalence classes through equivalence classes: a possible model of social stereotyping.

In Experiment 1, subjects acquired conditional equivalence classes controlled by three male and three female names as contextual stimuli. When equivalence relations were tested using new names not used in training (three male and three female), contextual control remained intact. Thus, generalized control of the composition of conditional equivalence classes by characteristically gender-identified names was shown. A basic analysis of this finding was tested in Experiment 2. Contextual equivalence classes were established using as contextual stimuli nonrepresentational visual figures that were members of additional pretrained three-member equivalence classes. When other stimuli in the pretrained equivalence classes were used as contextual stimuli, the conditional equivalence classes remained intact. Control subjects showed that this effect depended on the equivalence relations established in pretraining. The results show that contextual control over equivalence classes can transfer through equivalence classes. The implications of this phenomenon for social stereotyping are discussed.     

Social perceptions of male and female extreme mesomorphs.

In this study, male and female university students in the United States were exposed to mesomorphic or nonmesomorphic stimuli as reflected by photographs of either male body builders and non-body builders or female body builders and non-body builders. Then they were asked to attribute various personality traits and sex-role behaviors to them. Subjects, irrespective of their sex, perceived male and female body builders as possessing more traditionally masculine and less traditionally feminine personality characteristics than male and female non-body builders. Also, male and female body builders were seen as possessing less socially desirable traits than non-body builders. As predicted, female body builders were perceived generally as being more likely to engage in traditionally masculine sex-role behaviors in their dating and marriage relationships than female non-body builders. Contrary to expectation, however, male body builders were not perceived as more likely to engage in higher levels of masculine sex-role behaviors than male non-body builders.     

Male versus female Siamese fighting fish as reinforcing stimuli for conspecific males in single- and two-choice operant situations

Two experiments attempted to determine the reinforcing effectiveness of visual exposure to a female versus a male stimulus in male Siamese fighting fish (Betta splendens). This was accomplished by making male or female presentation contingent upon an operant ring swimming response in single- (Experiment 1) and two-choice (Experiment 2) continuous reinforcement operant situations for 1 hr per day. It was found that visual exposure to a female stimulus was behaviorally reinforcing in a way comparable to that typically found in intermale studies. If given a choice, male test subjects were observed to demonstrate a consistent preference for the female as opposed to the male stimulus. The results are discussed in terms of stimulus discrimination and approach-avoidance conflict as differentially elicited by male and female target stimuli.     

Talker continuity and the use of rate information during phonetic perception

Research has shown that speaking rate provides an important context for the perception of certain acoustic properties of speech. For example, syllable duration, which varies as a function of speaking rate, has been shown to influence the perception of voice onset time (VOT) for syllableinitial stop consonants. The purpose of the present experiments was to examine the influence of syllable duration when the initial portion of the syllable was produced by one talker and the remainder of the syllable was produced by a different talker. A short-duration and a long-duration /bi/-/pi/ continuum were synthesized with pitch and formant values appropriate to a female talker. When presented to listeners for identification, these stimuli demonstrated the typical effect of syllable duration on the voicing boundary: a shorter VOT boundary for the short stimuli than for the long stimuli. An /i/ vowel, synthesized with pitch and formant values appropriate to a male talker, was added to the end of each of the short tokens, producing a new hybrid continuum. Although the overall syllable duration of the hybrid stimuli equaled the original long stimuli, they produced a VOT boundary similar to that for the short stimuli. In a second experiment, two new /i/ vowels were synthesized. One had a pitch appropriate to a female talker with formant values appropriate to a male talker; the other had a pitch appropriate to a male talker and formants appropriate to a female talker. These vowels were used to create two new hybrid continua. In a third experiment, new hybrid continua were created by using more extreme male formant values. The results of both experiments demonstrated that the hybrid tokens with a change in pitch acted like the short stimuli, whereas the tokens with a change in formants acted like the long stimuli. A fourth experiment demonstrated that listeners could hear a change in talker with both sets of hybrid tokens. These results indicate that continuity of pitch but not formant structure appears to be the critical factor in the calculation of speaking rate within a syllable.