Capuchin monkeys (Cebus apella) respond to video images of themselves

Many studies have used mirror-image stimulation in attempts to find self-recognition in monkeys. However, very few studies have presented monkeys with video images of themselves; the present study is the first to do so with capuchin monkeys. Six tufted capuchin monkeys were individually exposed to live face-on and side-on video images of themselves (experimental Phase 1). Both video screens initially elicited considerable interest. Two adult males looked preferentially at their face-on image, whereas two adult females looked preferentially at their side-on image; the latter elicited lateral movements and head-cocking. Only males showed communicative facial expressions, which were directed towards the face-on screen. In Phase 2 monkeys discriminated between real-time, face-on images and identical images delayed by 1 s, with the adult females especially preferring real-time images. In this phase both screens elicited facial expressions, shown by all monkeys. In Phase 3 there was no evidence of discrimination between previously recorded video images of self and similar images of a familiar conspecific. Although they showed no signs of explicit self-recognition, the monkeys’ behaviour strongly suggests recognition of the correspondence between kinaesthetic information and external visual effects. In species such as humans and great apes, this type of self-awareness feeds into a system that gives rise to explicit self-recognition.     

EVALUATION OF THE MULTIPLE-STIMULUS WITHOUT REPLACEMENT PREFERENCE ASSESSMENT METHOD USING ACTIVITIES AS STIMULI

The current study examined the accuracy of the multiple-stimulus without replacement (MSWO) preference assessment for identifying preferred common classroom activities as reinforcers with children with behavioral disorders. The accuracy of predictions from the MSWO regarding high, medium, and low stimulus preference was tested by providing contingent access to activities for completing math problems within an independent seatwork format. Overall, there was an interaction effect between preference ranking (high, medium, or low) and number of problems completed. The results confirm and extend previous findings regarding the accuracy of predictions with the MSWO. The findings also reveal, however, some individual differences that may account for instances in which student behavior did not conform to predictions of stimulus preference assessments.     

Picture book exposure elicits positive visual preferences in toddlers

Although the relationship between “mere exposure” and attitude enhancement is well established in the adult domain, there has been little similar work with children. This article examines whether toddlers’ visual attention toward pictures of foods can be enhanced by repeated visual exposure to pictures of foods in a parent-administered picture book. We describe three studies that explored the number and nature of exposures required to elicit positive visual preferences for stimuli and the extent to which induced preferences generalize to other similar items. Results show that positive preferences for stimuli are easily and reliably induced in children and, importantly, that this effect of exposure is not restricted to the exposed stimulus per se but also applies to new representations of the exposed item.     

Relationships between language structure and language learning: the suffixing preference and grammatical categorization

It is a reasonable assumption that universal properties of natural languages are not accidental. They occur either because they are underwritten by genetic code, because they assist in language processing or language learning, or due to some combination of the two. In this paper we investigate one such language universal: the suffixing preference across the world's languages, whereby inflections tend to be added to the end of words. A corpus analysis of child-directed speech in English found that suffixes were more accurate at cuing the grammatical category of the root word than were prefixes. An artificial language experiment found that there was a learning advantage for suffixes over prefixes in terms of grammatical categorization within an artificial language. The results are consistent with an account of language universals that originate in general purpose learning mechanisms.     

风险偏好与框架效应对大学生职业决策的影响

在应用Hsee等设计的风险偏好水平问卷对46名大学生进行分组的基础上,通过设计职业决策情境,探究了当代大学生职业决策与其风险偏好、职业方案以及方案的框架性倾向之间的关系。研究结果表明：（1）高风险偏好大学生的职业选择倾向明显高于低风险偏好的大学生,尤其对冒险职业方案的选择中,上述趋势最为明显;（2）框架效应存在于大学生职业决策情境中,他们更倾向于选择采用积极口吻表述的职业方案;（3）大学生对冒险、折中、保守三种方案的职业选择倾向有显著地逐渐增大的趋势。     

攻击行为对儿童受欺负的预测：社会喜好的中介效应及性别差异

摘 要 以455名武汉某小学四、五、六年级的儿童为被试,采用同伴提名法、班级戏剧问卷,考察了不同性别儿童的外部攻击、关系攻击、社会喜好与受欺负之间的关系,重点检验了社会喜好在不同类型攻击行为与受欺负之间的中介效应及性别差异。结果表明：（1）小学儿童的外部攻击、关系攻击、社会喜好与受欺负之间均存在显著相关;其中男生的外部攻击与社会喜好、关系攻击与社会喜好的相关系数均显著高于女生;（2）小学儿童在外部攻击和社会喜好维度上得分存在显著的性别差异,男生的外部攻击得分显著高于女生,社会喜好得分显著低于女生;（3）社会喜好分别在外部攻击、关系攻击与受欺负之间存在中介效应,且外部攻击和关系攻击对社会喜好的预测系数均存在显著性别差异,表现为外部攻击、关系攻击对社会喜好的预测作用男生显著高于女生;社会喜好对受欺负的预测系数存在显著的性别差异,表现为社会喜好对受欺负的预测作用女生显著高于男生;而外部攻击和关系攻击对受欺负的预测系数均不存在性别差异。     

汉字内隐记忆的实验研究（Ⅰ）──内隐记忆存在的条件

通过四个２×２×２方差设计实验,将直接测量（再认任务）和间接测量（偏好判断任务）在形式上进行匹配,考察了汉字的注意因素,测量任务因素和时程因素经过不同组合构成的１０种情况,其中测量任务因素的间接测量根据汉字的局部加工（字形、字义、字音）和整体加工（整体特征）分为四种子任务,试图寻找汉字认知范畴里内隐记忆存在的条件。实验分学习和测验两个阶段。学习阶段的处理对所有被试都相同。测验阶段的不同指导语形成不同的测量任务。结果发现了内隐记忆存在的三个必要条件是非注意（目标）汉字,汉字的整体加工和偏好判断任务后阶段。匹配方法的使用是发现内隐记忆的保证。汉字的整体加工和局部加工具有不同的特点。     

Evidence that rats discriminate between familiar and unfamiliar putative urinary odorants of adult male conspecifics

Adam [1976; Lehman and Adams, 1977] suggested that a resident rat makes an olfactory comparison of cage odor and other rat odor prior to attacking an unfamiliar conspecific intruder. The findings of the present study are consistent with the notion that rats discriminate between familiar and unfamiliar putative urinary odorants Adult male albino rats were tested for preferences between areas treated with familiar urine (11 hours pretest exposure), unfamiliar urine (no pretest exposure), and untreated areas. Subjects (N = 12) preferred areas treated with familiar urine over ones treated with unfamiliar urine (p < 0.05). Also, they (N = 12 per preference-test group) preferred areas treated with either urine over untreated ones (familiar versus clean, p < 0.01; unfamiliar versus clean, p < 0.05).     

效用主义概念系统的主要类型及其创新分析

效用主义伦理学一直面临一个现实困难,就是“效用究竟是什么”的问题。在这一问题上,各派效用主义理论都有自己的概念体系。早期的效用主义者用快乐、幸福来代表和计量效用;中期的效用主义者用福利、增量社会价值来表示效用的实质概念;而现代派则主要用“偏好及其满足”的内涵来定义效用的实质。本文分析和总结了效用概念在理论和实践上的发展及延变,并且用心理学的知情意概念系统对它们做了新的分类和分析。     

认知闭合需要、框架效应与决策偏好

在带有模糊性的决策情境中,决策者个人的认知特征会对其判断决策产生重要影响。通过实验的方法,考察了认知闭合需要和特征框架效应对个体决策偏好的影响。93名工商管理硕士（MBA）参与了实验,研究的结果支持了本研究的3个假设,即认知闭合需要与特征框架效应不仅对被试的决策偏好存在显著的影响,而且二者还存在显著的交互作用。具体来说,研究发现,在模糊情境中：高认知闭合需要的被试偏好于立刻做出决策,而低认知闭合需要的被试偏好于暂缓做出决策;接收到正向框架信息的被试偏好于立刻做出决策,而接收到负向框架信息的被试偏好于暂缓做出决策;认知闭合需要与特征框架对被试的决策偏好还存在显著的交互作用。研究结论为根据个体认知闭合需要的水平来选拔决策者、利用框架效应来影响个体的信息加工方式进而提高决策质量提供了理论依据