Projectibility and Explainability or How to Draw a New Picture of Inductive Practices

Summary  Goodman published his “riddle” in the middle of the 20th century and many philosophers have attempted to solve it. These attempts almost all shared an assumption that, I shall argue, might be wrong, namely, the assumption that when we project from cases we have examined to cases we have not, what we project are predicates (and that this projectibility is an absolute property of some predicates). I shall argue that this assumption, shared by almost all attempts at a solution, looks wrong, because, in the first place, what we project are generalizations and not predicates, and a generalization is projectible (or unprojectible) relative to a given context. In this paper I develop the idea of explainable–projectible generalizations versus unexplainable–unprojectible generalizations, relative to a specific context. My main claim is that we rationally project a generalization if and only if we rationally believe that there is something that explains the general phenomenon that the generalized statement in question asserts to obtain, and that a generalization is projectible, if and only if its putative truth can be explained, whether we know that it can be or not.     

Induction of Relational Schemas: Common Processes in Reasoning and Complex Learning

Five experiments were performed to test whether participants induced a coherent representation of the structure of a task, called a relational schema, from specific instances. Properties of a relational schema include: An explicit symbol for a relation, a binding that preserves the truth of a relation, potential for higher-order relations, omnidirectional access, potential for transfer between isomorphs, and ability to predict unseen items in isomorphic problems. However relational schemas are not necessarily coded in abstract form. Predictions from relational schema theory were contrasted with predictions from configural learning and other nonstructural theories in five experiments in which participants were taught a structure comprised of a set of initial-state,operator → end-state instances. The initial-state,operator pairs were presented and participants had to predict the correct end-state. Induction of a relational schema was achieved efficiently by adult participants as indicated by ability to predict items of a new isomorphic problem. The relational schemas induced showed the omnidirectional access property, there was efficient transfer to isomorphs, and structural coherence had a powerful effect on learning. The “learning to learn” effect traditionally associated with the learning set literature was observed, and the long-standing enigma of learning set acquisition is explained by a model composed of relational schema induction and structure mapping. Performance was better after reversal of operators than after shift to an alternate structure, even though the latter entailed more overlap with previously learned tasks in terms of the number of configural associations that were preserved. An explanation for the reversal shift phenomenon in terms of induction and mapping of a relational schema is proposed. The five experiments provided evidence supporting predictions from relational schema theory, and no evidence was found for configural or nonstructural learning theories.     

特征归纳的关联相似性模型

作者提出特征归纳的关联相似性模型,用以描述以归纳特征的关联特征相似性为基础的归纳推理,把归纳推理中相似性和关联知识统一整合起来。该模型认为归纳强度主要取决于归纳特征与关联特征的关联强度和关联特征的相似性程度的乘积,归纳信心主要取决于关联强度,从而分离归纳信心和归纳强度。以大学生为被试的两个实验的主要结果支持关联相似性模型的主要预测。关联相似性模型能够描述解释以关联特征相似性为基础的归纳推理现象,比以往的归纳理论具有更大的解释能力和解释范围     

Why are some people more susceptible to ingroup threat than others? The importance of a relative extrinsic to intrinsic value orientation

Whereas an individual differences perspective recently pointed to the importance of a relative extrinsic to intrinsic value orientation in the prediction of outgroup attitudes, the intergroup relations perspective stresses the importance of threat. This study investigates the interplay of both perspectives. A scenario study among high-school students showed that only people who attach greater relative importance to extrinsic values react with a negative attitude towards an outgroup that is portrayed as threatening. A longitudinal study among university students then showed that people with a relatively greater extrinsic value orientation are not only more likely to react to threat but also to perceive threat. Specifically, cross-lagged analyses showed that a relatively greater extrinsic value orientation predicted over-time increases in threat perceptions.     

Pleasure and interest are differentially affected by replaying versus analyzing a happy life moment

Previous research regarding the effects of thinking about a happy moment on emotional experience has been equivocal. The discrepancies may be explained by different modes of thinking: systematically thinking about a happy moment versus mentally replaying the happy moment. Another explanation may involve the difference between the emotion of interest and the emotion of pleasantness, which are often erroneously grouped together under the broad concept of ‘positive affect.’ We hypothesized that systematically thinking about a happy moment would generate interest, whereas mental replaying would generate pleasantness. In an experimental setting, people who systematically analyzed a happy moment increased feelings of interest, while the level of pleasantness remained unchanged. In the alternative condition, people who mentally replayed a happy moment reported increased interest and pleasantness. At post-intervention, the replay group scored higher on pleasantness, but not on interest, relative to the analyze group.     

Evidence that an episodic mode of thinking facilitates encoding of perceptually rich memories for naturalistic events relative to a gist-based mode of thinking

ABSTRACT

Several studies have demonstrated that an episodic specificity induction (ESI) can influence cognitive abilities that involve episodic processes at retrieval. To better understand the downstream implications of an “episodic mode of thinking,” we investigate whether an ESI influences encoding of new events. In a between-subjects design, participants were given an ESI or gist (control) induction. In an ostensibly unrelated task, participants then were shown film clips of naturalistic events. After a filled delay, participants were given a surprise memory test, which required narrative recollection of the film clips. Participants who received the ESI generated narratives that contained more perceptual details specifically. Relative to gist thinking, an episodic mode of thinking appears to facilitate encoding of perceptually rich memories for naturalistic events.     

术前人文关怀对肺癌手术患者全麻诱导心理和生理的影响

为探讨术前进行人文关怀式沟通和健康教育对肺癌手术患者全麻诱导后心理和生理的影响,将83例非同期别的肺癌手术患者（均采用全身麻醉,双腔管气管插管辅助通气）分成两组。观察组进行人文关怀式沟通,对照组采用普通沟通。判定方法采用焦虑自评量表（SAS）,根据焦虑评分反映两组患者入院即刻及手术前的心理变化情况,监测全麻诱导即刻与全麻诱导气管插管后5min患者平均动脉压（MBP）的波动、心率（HR）的变化,用两个时间段两个变量的差值来反映两组患者全麻诱导期发生心理和生理反应的情况。结果显示,两组患者入院即刻焦虑差异无统计学意义（P〉0．05）;手术前SAS评分两组患者较入院即刻降低（P〈0．05）,并且观察组与对照组相比下降更明显（P〈0．01）;观察组患者MBP波动无统计学意义（P〉0．05）、HR波动有统计学意义（P〈0．05）。因此,证实人文关怀式沟通和健康教育能够减轻肺癌患者在心理和生理两个方面对麻醉和手术产生的不良反应。