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.     

A 12-Year Prospective Study of Patterns of Social Information Processing Problems and Externalizing Behaviors

This study investigated how discrete social information processing (SIP) steps may combine with one another to create distinct groups of youth who are characterized by particular patterns of SIP. SIP assessments were conducted on a community sample of 576 children in kindergarten, with follow-up assessments in grades 3, 8, and 11. At each age, four profiles were created, representing youth with no SIP problems, with early step SIP problems (encoding or making hostile attributions), with later step SIP problems (selecting instrumental goals, generating aggressive responses, or evaluating aggression positively), and with pervasive SIP problems. Although patterns of SIP problems were related to concurrent externalizing during elementary school, the consistency between cognition and future externalizing behavior was not as strong in elementary school as it was between grades 8 and 11. In some cases, youth characterized by the co-occurrence of problems in early and later SIP steps had higher externalizing scores than did youth characterized by problems in just one or the other.     

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).     

Effects of the "beauty is good" stereotype on children's information processing

The authors tested schematic information processing as a function of attractiveness stereotyping in two studies. An adult experimenter read children (ages 3 to 7 years) eight different stories in which a child narrator encountered two characters who varied in level of attractiveness and displayed positive or negative traits that were either consistent or inconsistent with the "beauty is good" stereotype. Following the story, the experimenter showed each child a photograph of the two characters' faces and asked the child to point to the character who displayed the positive trait. In Experiment 1, children made more errors in identifying female characters with stereotype inconsistent traits but did just the opposite with male characters. Experiment 2 replicated the findings with female characters but found no difference in errors with male characters. The findings have implications for how attractiveness and gender stereotypes affect children's information processing, how attractiveness schemata may be organized, and why physical attractiveness stereotypes are maintained.     

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。     

Fear of the beast: a prospective study on the effects of negative information on childhood fear

The current study examined the effects of negative information on the enhancement of childhood fear. A large group of normal primary school children aged between 4 and 12 years (N=285) received either negative or positive information about an unknown, doglike animal, called 'the beast'. Children's fears were assessed at three points in time: before, directly after, and one week after the information about the beast was provided (i.e., pre-, post- and follow-up assessment). Results showed that type of information changed children's fear of the beast in the predicted direction with negative information increasing fear levels and positive information decreasing fear levels. This was not only the case directly after the experimental manipulation but also at one week follow-up. Furthermore, fear of the beast appeared to generalize, that is, children who became more fearful of the beast after receiving negative information, also became more apprehensive of other dogs and predators.     

The role of risk,regret, and rejoice in non-instrumental information seeking

Standard theories suggest that humans should seek information only when it can help them make better decisions. However, recent work suggests that people choose to seek information even when it cannot influence the outcome of a choice. Across three experiments, we examined how this preference for non-instrumental information was related to the risk, regret, and rejoice associated with different choices. Experiment 1 examined how risk preference informed the appetite for non-instrumental information and tested how risk and information preference in a gamble-task related to the desire for knowledge across a range of hypothetical real-world scenarios. In Experiment 2, we tested how risk, operationalized as variance, related to non-instrumental information seeking when allowing participants to mentally simulate the potential outcomes of gambles. In Experiment 3, we provided explicit feedback about forgone options, intending to make the potential for regret or rejoice more salient. Taken together, our results show a consistent appetite for information that was robust to changes across all experimental manipulations. We found some evidence of a positive correlation between the desire for knowledge and the level of anticipated regret (Experiment 1), but overall, our data appear more consistent with the idea that non-instrumental information seeking is driven by a general aversion to uncertainty than by an attempt to regulate specific future emotions.