认知诊断模型中项目水平模型比较统计量的健壮性

使用模拟研究方法比较了以往研究中提出的基于观察信息矩阵、三明治矩阵的Wald（分别表示为W_Obs、W_Sw）、似然比（Likelihood Ratio）统计量以及新提出的基于经验交叉相乘信息矩阵的Wald统计量（W_XPD）在模型——数据失拟条件下进行项目水平上模型比较时的表现。结果显示：（1）W_Sw的一类错误控制率有很强的健壮性。（2）W_XPD在Q矩阵错误设定的大多数条件下的表现优于W_Sw。结论：模型—数据拟合良好时可以使用W_Sw进行项目水平上的模型比较,当模型与数据失拟时W_XPD可能是更好的选择。     

Some Consequences for Helpers Who Deliver “Cold Comfort”: Why it's Worse for Women than Men to be Inept When Providing Emotional Support

Two experiments were conducted to assess whether responses to helpers who used insensitive emotional support vary as a function of the interaction between sex of participant and helper. We hypothesized that women would evaluate an insensitive female helper and her behavior more negatively than they would an insensitive male helper. In Experiment 1, participants (N = 137) read conversations in which male or female helpers sought to comfort emotionally distressed friends. In Experiment 2, participants (N = 87) engaged in face-to-face interactions in which they were comforted by either a male or female helper who used insensitive comforting messages. Overall, the results imply that women with deficient emotional support skills may be at high risk of rejection by same-sex peers. A preliminary report of Experiment 1 was presented at the biennial meeting of the International Association for Relationship Research, Madison, WI, July, 2004.     

The “identified victim” effect: an identified group,or just a single individual?

People's greater willingness to help identified victims, relative to non‐identified ones, was examined by varying the singularity of the victim (single vs. a group of eight individuals), and the availability of individually identifying information (the main difference being the inclusion of a picture in the “identified” versions). Results support the proposal that the “identified victim” effect is largely restricted to situations with a single victim: the identified single victim elicited considerably more contributions than the non‐identified single victim, while the identification of the individual group members had essentially no effect on willingness to contribute. Participants also report experiencing distress when the victim is single and identified more than in any other condition. Hence, the emotional reaction to the victims appears to be a major source of the effect. Copyright © 2005 John Wiley & Sons, Ltd.     

情境模型建构过程中空间信息的作用探讨

本研究采用扇效应技术来进一步探讨空间信息在情境模型建构过程当中的作用。共分为两个分实验。实验1通过在材料中使用同样具有可“移动性”的物体概念（例如快餐车）来探讨“可移动性”是否是“[人]在[大场所]”材料范式下观察不到信息整合的根本原因。实验2将材料中的“大场所”地点替换为“中场所”地点,来进一步探讨空间信息在情境模型建构过程中的作用特点。结果表明“人的可移动性”不是“[人]在[大场所]”材料范式下观察不到信息整合的原因并且在不受个体背景知识衰减的情况下．空间信息对情境模型建构的影响作用强于主人公信息的影响作用。     

Applying evidence to support ethical decisions: Is the placebo really powerless?

Using placebos in day-to-day practice is an ethical problem. This paper summarises the available epidemiological evidence to support this difficult decision. Based on these data we propose to differentiate between placebo and “knowledge framing”. While the use of placebo should be confined to experimental settings in clinical trials, knowledge framing — which is only conceptually different from placebo — is a desired, expected and necessary component of any doctor-patient encounter. Examples from daily practice demonstrate both, the need to investigate the effects of knowledge framing and its impact on ethical, medical, economical and legal decisions. An earlier version of this paper was presented at an international conference, “Placebo: Its Action and Place in Health Research Today,” held in Warsaw, Poland on 12–13 April, 2003.     

Lateralization of object-shape information in semantic processing

An experiment was conducted to examine whether perceptual information, specifically the shape of objects, is activated during semantic processing. Subjects judged whether a target word was related to a prime word. Prime-target pairs that were not associated, but whose referents had similar shapes (e.g. LADDER-RAILROAD) yielded longer "no" responses than unassociated prime-target pairs, suggesting that shape information had been activated. A visual-field manipulation showed that, in right-handed subjects, this effect was localized in the left hemisphere. This finding is consistent with behavioral, brain imaging, and lesion data, which suggest that object shape at the category level is represented in the left hemisphere.     

Heuristics as beliefs and as behaviors: the adaptiveness of the "hot hand"

and analyzed reasoning by asking: what are the reasoner's goals? This emphasizes the adaptiveness of behavior rather than whether a belief is normative. Belief in the "hot hand" in basketball suggests that players experiencing streaks should be given more shots, but this has been seen as a fallacy due to failure to find dependencies between players' shots. Based on their findings, I demonstrate by Markov modeling and simulation that streaks are valid allocation cues for deciding who to give shots to, because this behavior achieves the team goal of scoring more. Empirically I show that this adaptive heuristic is supported by the fallacious belief in dependency, more so as skill level increases. I extend the theoretical analysis to identify general conditions under which following streaks should be beneficial. Overall, this approach illustrates the advantages of analyzing reasoning in terms of adaptiveness.     

The influence of intentional and incidental learning on acquiring spatial knowledge during navigation

In order to study the influence of intentional and incidental learning conditions on route learning, young adults walked a route through a university building. Half of the participants focused their attention on the route (intentional learning condition), while the other half did not (incidental learning condition). Five tests of spatial knowledge were employed: a route-length-estimation, landmark recognition, landmark ordering, map-drawing and navigation task. The intentional group performed better than the incidental group on the map-drawing and navigation task. No difference between the intentional and incidental group was found on the landmark-recognition and landmark-ordering task. Moreover, the intentional group overestimated the walking distance, while the incidental group underestimated it. These results suggest that route knowledge (landmark recognition and landmark ordering) requires less effortful processing than survey knowledge (developing a map-like representation and actual navigation).