Contrast Effects and Approval Voting: An Illustration of a Systematic Violation of the Independence of Irrelevant Alternatives Condition

In approval voting, voters indicate all alternatives acceptable to them, instead of indicating their most preferred alternative. This study sought to examine the hypothesis that, under certain conditions, approval voting systematically violates a rationality condition of social choice: the independence of irrelevant alternatives condition. Given a well-known psychological phenomenon, the contrast effect, it was hypothesized that sets of acceptable alternatives might be changed as a result of changes in unacceptable alternatives. This hypothesis was tested in a sample of undergraduates who were presented with fictional profiles of juvenile delinquents and then were asked whether they should be granted parole. The outcomes of approval voting changed merely as the result of a change in an alternative least preferred by all voters.     

Preference of dissonance reduction modes as a function of their order,familiarity and reversibility

Two central hypotheses of the original version of the theory of cognitive dissonance (Festinger, 1957) (1) that dissonance is to be conceived of as a primary drive and (2) that in order to reduce dissonance less resistant cognitions will be changed more than highly resistant ones led to hypotheses which were confirmed by two experiments. In Experiment I, a 2 × 3 factorial design, order and familiarity of dissonance reduction modes were manipulated. After receiving a dissonant information the subjects were offered a relatively low and a relatively high resistant cognition for dissonance reduction, each being placed first (series I, high-low resistance) or last (series II, low-high resistance) respectively. Subjects did (known) or did not (unknown) read these modes before reacting to them. Under the unknown condition dissonance will be reduced more with a specific mode if it is placed first than last. With known reduction modes the order of presentation does not have an effect. Under series I condition the first-placed, higher-resistant cognition will be changed more in the unknown condition than in the known condition. Under the series II condition the first-placed, lower-resistant cognition will be changed equally in the known and unknown condition. In short, the higher-resistant cognition will be changed more, only when it is placed first and when the following modes are not known. Two explanations for these results are possible: (1) The more dissonance is reduced by changing a more or a less resistant congnition, the less further reduction is necessary; (2) dissonance will be reduced in an internally consistent way. Experiment II excluded the first explanation. Subjects were allowed to revise their original way of reducing dissonance. First, subjects in one condition received series I unknown and subjects in the other condition received series II unknown. Reacting to the dissonance reduction modes the second time, there was more revision when the high-resistant congition was placed first (series 1 revision) than when placed last (series II revision). These results support the hypothesis that dissonance reduction by changing a less-resistant congnition more and changing a high-resistant one less is preferred. Implications of the results of the two experments for the stability of dissonance reduction, the method and interpretation of dissonance experiments are discussed.     

Affective consequences of mere ownership: The name letter effect in twelve European languages

The hypothesis is tested that mere ownership of an object is a sufficient condition to enhance its likelihood to become one of the most attractive items of the entire set of similar objects. Evidence is presented that isolated visual letter stimuli belonging to one's own name are more often ranked among the six most preferred letters of the entire alphabet than identical not-own name letters. Across 12 different European languages, an (own) name letter effect was found for (initial and/or not-initial) letters belonging to own first and/or family name. The fundamental theoretical relevance of the effect is outlined as well as its heuristic value for research on individual versus collective ownership and on affective asymmetry. A cross-lingual analysis of the six least preferred letters-while also confirming the mere ownership hypothesis-calls for a critical reformulation of Zajonc's mere exposure theory.     

Le renversement de préférence… renversé !

Preference reversal (PR) occurs when pairs of lottery gambles are evaluated under two different conditions: to choose the gamble preferred to play and assign minimum selling price to each gamble. The preference order is then reversed from one condition to another: while it receives the lowest selling price, the gamble less risked is preferred in condition of play. Many times replicated, this result is considered as a cognitive bias. Recent research suggests that it could be related only to the procedure used to present the gambles (i.e., the evaluation mode): either by pair (joint evaluation or JE) in condition of play, or one by one (separate evaluation or SE) in the pricing task. Then, by reversing the evaluation mode in each condition, PR should be reversed, as it is shown in this study: although the phenomenon still occurs when subjects evaluate gambles in the classical paradigm, we observe an inversion of PR when they have, on the one hand, to play in SE, and on the other hand, to sell in JE. Furthermore, an analysis not often used in this literature provides new elements, which can attest to the cognitive mechanisms underlying the phenomenon: by recording the online information (self-paced display time paradigm) we show the effect of an anchoring and adjustment process when riskiest gambles are preferred.     

Regress Argument Reconstruction

If an argument can be reconstructed in at least two different ways, then which reconstruction is to be preferred? In this paper I address this problem of argument reconstruction in terms of Ryle’s infinite regress argument against the view that knowledge-how requires knowledge-that. First, I demonstrate that Ryle’s initial statement of the argument does not fix its reconstruction as it admits two, structurally different reconstructions. On the basis of this case and infinite regress arguments generally, I defend a revisionary take on argument reconstruction: argument reconstruction is mainly to be ruled by charity (viz. by general criteria which arguments have to fulfil in order to be good arguments) rather than interpretation.     

Filtering Theories of Truth: Compositionality as a Criterion

The traditional way to filter out the implausible candidate solutions to the semantic paradoxes is to appeal to the so-called “cost/benefit analyses.” Yet it is often tedious and controversial to carry out such analyses in detail. Facing this, it would be helpful for us to rely upon some principles to filter out at least something, if not everything, from them. The proposal in this paper is thereby rather simple: We may use principles of compositionality as a “filter” for this purpose. The paper has four sections. In Section 2, the author uses the filter to examine Kripke’s fixed-point theory and to thereby show how it works. In Section 3, the author gives more examples from the classical theories of truth to demonstrate the power of the filter. In Section 4, the author addresses the skepticism concerning whether there is any consistent or non-trivial theory of truth that can survive this filtering procedure. A “nearly sufficient” condition for a theory of truth to survive this test is discussed in order to show that at least some consistent or non-trivial theories of truth do indeed survive the filtering procedure.     

CONTIME: Continuous-Time Analysis of Parallel Streams of Behavior

The accurate assessment of model fit has emerged as a vital area of research in the advancement of structural equation modeling. Two recent indices of fit, the Relative Noncentrality Index (RNI, McDonald &; Marsh, 1990) and the Comparative Fit Index (CFI, Bentler, 1990), constitute major progress in this regard. This research demonstrates that the RNI and CFI are algebraically equivalent in most applications but. identifies one condition in which the indices will not be identical. In this condition, it is suggested ithat the RNI may be advantageous for model comparison purposes whereas the CEI may be preferred with respect to efficiency of estimate. Additionally, two cautions pertaining tcc the incremental approach to fit underlying both indices are discussed and appropriate recommendations are provided.     

Test of a Level of Aspiration model of group decision making: Non-obvious group preference reversal due to an irrelevant alternative

We conducted two experiments that investigated a non-obvious prediction of a Level of Aspiration (LOA) model of group decision making. In both experiments, groups chose among three alternatives, A, B, and C, with C always being least preferred by all of the group members. In each experiment, by manipulating the nature of alternative C, we created two conditions differing in whether only A or only B was acceptable to all members. In support of the LOA model, groups tended to choose the alternative acceptable to all members, even when (Experiment 2) a majority of members most preferred a different alternative. Implications of the results for the LOA model are discussed in the context of social choice theory.     

Delay reduction: current status.

Delay-reduction theory states that the effectiveness of a stimulus as a conditioned reinforcer may be predicted most accurately by the reduction in time to primary reinforcement correlated with its onset. We review support for the theory and then discuss two new types of experiments that assess it. One compares models of choice in situations wherein the less preferred outcome is made more accessible; the other investigates whether frequency of conditioned reinforcement affects choice beyond the effect exerted by frequency of primary reinforcement.     

Ethical Theories and the Transparency Condition

Following John Rawls, writers like Bernard Williams and Christine Korsgaard have suggested that a transparency condition should be put on ethical theories. The exact nature of such a condition and its implications is however not anything on which there is any consensus. It is argued here that the ultimate rationale of transparency conditions is epistemic rather than substantively moral, but also that it clearly connects to substantive concerns about moral psychology. Finally, it is argued that once a satisfactory form of the transparency condition is formulated, then, at least among the main contenders within ethical theory, it speaks in favor of a broadly Aristotelian approach to ethical theorizing.     

安乐死对象的界定

目前关于安乐死对象的界定,突出了医学要件,忽略了权利要件。为安乐死立法,必须对安乐死对象作出法律界定,应该满足两个条件：一是自然条件,即存在死亡痛苦;二是权利条件,即公民享得并行使安乐死的权利。不规定和具备权利条件,仅存在死亡痛苦,在法律上不能列为安乐死对象。     

The origins of cognitive dissonance: evidence from children and monkeys

In a study exploring the origins of cognitive dissonance, preschoolers and capuchins were given a choice between two equally preferred alternatives (two different stickers and two differently colored M&M's, respectively). On the basis of previous research with adults, this choice was thought to cause dissonance because it conflicted with subjects' belief that the two options were equally valuable. We therefore expected subjects to change their attitude toward the unchosen alternative, deeming it less valuable. We then presented subjects with a choice between the unchosen option and an option that was originally as attractive as both options in the first choice. Both groups preferred the novel over the unchosen option in this experimental condition, but not in a control condition in which they did not take part in the first decision. These results provide the first evidence of decision rationalization in children and nonhuman primates. They suggest that the mechanisms underlying cognitive-dissonance reduction in human adults may have originated both developmentally and evolutionarily earlier than previously thought.     

An evaluation of the effects of matched stimuli on behaviors maintained by automatic reinforcement

The purpose of the current investigation was to extend the literature on matched stimuli to three dissimilar forms of aberrant behavior (dangerous climbing and jumping, saliva manipulation, and hand mouthing). The results of functional analyses suggested that each behavior was automatically reinforced. Preference assessments were used to identify two classes of stimuli: items that matched the hypothesized sensory consequences of aberrant behavior (matched stimuli) and items that produced sensory consequences that were not similar to those produced by the aberrant behavior (unmatched stimuli). The effects of providing continuous and noncontingent access to either the most highly preferred matched or the most highly preferred unmatched stimuli were assessed relative to a condition in which no stimuli were available. Overall results suggested that providing access to items that matched the hypothesized sensory consequences of aberrant behavior may be more effective than simply selecting stimuli either arbitrarily or based on the results of preference assessments alone.     

Validity of the multiple-stimulus without replacement preference assessment for edible items

Studies have shown that the multiple-stimulus without replacement (MSWO) preference assessment is an effective assessment format for identifying preferred items. However, it is possible that factors other than reinforcer quality might influence selections by some individuals when the MSWO array consists of edible items. The validity of the MSWO results was evaluated by comparing items identified as most and least preferred by the MSWO assessment in a concurrent-schedule (CS) format. Varying edible items were used in each study. The MSWO format accurately identified the higher quality edible item for most participants across studies (76%); however, the MSWO format did not predict the highest quality edible item in the CS assessment for 20% to 30% of participants in each study.     

The mirror effect and mixture signal detection theory

The mirror effect for word frequency refers to the finding that low-frequency words have higher hit rates and lower false alarm rates than high-frequency words. This result is typically interpreted in terms of conventional signal detection theory (SDT), in which case it indicates that the order of the underlying old item distributions mirrors the order of the new item distributions. However, when viewed in terms of a mixture version of SDT, the order of hits and false alarms does not necessarily imply the same order in the underlying distributions because of possible effects of mixing. A reversal in underlying distributions did not appear for fits of mixture SDT models to data from 4 experiments.     

Moderate epistemic expressivism

The present paper argues that there are at least two equally plausible yet mutually incompatible answers to the question of what is of non-instrumental epistemic value. The hypothesis invoked to explain how this can be so—moderate epistemic expressivism—holds that (a) claims about epistemic value express nothing but commitments to particular goals of inquiry, and (b) there are at least two viable conceptions of those goals. It is shown that such expressivism survives recent arguments against a more radical form of epistemic expressivism, as well as two further arguments, framed in terms of the two most promising attempts to ground claims about epistemic value in something other than commitments to particular conceptions of inquiry. While this does not establish that moderate epistemic expressivism is true, its ability to explain a significant but puzzling axiological datum, as well as withstand strong counterarguments, makes clear that it is a theory to be reckoned with.     

协作抑制的多机制解释:来自编码加工方式和编码相似性的证据

协作抑制是指小组提取的信息量比等量个体单独提取的信息总量要少。对于协作过程降低小组成员提取潜能的机制解释,不同研究之间仍有争论。本研究实验1使用经典的生存加工范式,实验2使用联想记忆训练法,分别考察编码加工方式和编码相似性对协作提取成绩的影响,从而检验提取抑制和策略破坏机制是否能分别影响协作抑制。研究结果表明,被试在生存和非生存(愉悦度和自我经历)加工条件下都出现协作抑制现象,而生存加工条件下的协作抑制量显著小于非生存加工条件;在使用联想记忆训练法之后,相同学习顺序组没有出现协作抑制,而不同学习顺序组出现了经典的协作抑制。本研究结果为协作抑制的可能存在的多机制解释提供了证据。     

The semantics and acquisition of number words: integrating linguistic and developmental perspectives

This article brings together two independent lines of research on numerally quantified expressions, e.g. two girls. One stems from work in linguistic theory and asks what truth conditional contributions such expressions make to the utterances in which they are used--in other words, what do numerals mean? The other comes from the study of language development and asks when and how children learn the meaning of such expressions. My goal is to show that when integrated, these two perspectives can both constrain and enrich each other in ways hitherto not considered. Specifically, work in linguistic theory suggests that in addition to their 'exactly n' interpretation, numerally quantified NPs such as two hoops can also receive an 'at least n' and an 'at most n' interpretation, e.g. you need to put two hoops on the pole to win (i.e. at least two hoops) and you can miss two shots and still win (i.e. at most two shots). I demonstrate here through the results of three sets of experiments that by the age of 5 children have implicit knowledge of the fact that expressions like two N can be interpreted as 'at least two N' and 'at most two N' while they do not yet know the meaning of corresponding expressions such as at least/most two N which convey these senses explicitly. I show that these results have important implications for theories of the semantics of numerals and that they raise new questions for developmental accounts of the number vocabulary.     

Reasoning as simulation

The theory that human cognition proceeds through mental simulations, if true, would provide a parsimonious explanation of how the mechanisms of reasoning and problem solving integrate with and develop from mechanisms underlying forms of cognition that occur earlier in evolution and development. However, questions remain about whether simulation mechanisms are powerful enough to exhibit human-level reasoning and inference. In order to investigate this issue, we show that it is possible to characterize some of the most powerful modern artificial intelligence algorithms for logical and probabilistic inference as methods of simulating alternate states of the world. We show that a set of specific human perceptual mechanisms, even if not implemented using mechanisms described in artificial intelligence, can nevertheless perform the same operations as those algorithms. Although this result does not demonstrate that simulation theory is true, it does show that whatever mechanisms underlie perception have at least as much power to explain non-perceptual human reasoning and problem solving as some of the most powerful known algorithms.     

The opponent-process theory of motivation: VIII. Quantitative and qualitative manipulations of food both modulate adjunctive behavior

The present studies extend the opponent-process theory of acquired motivation to the schedule-induced polydipsia paradigm and more generally to adjunctive behavior. The theory suggests that manipulations of the quality and the size of the pellet presented on an intermittent schedule should be important modulators of polydipsia. In Experiment 1, presenting animals with preferred, less preferred, or least preferred food pellets on a fixed-time 120-sec schedule resulted in progressively lower levels of water intake. In Experiment 2, the quality and size of the pellet were manipulated factorially. These variables were found to interact in the control of both the development and maintenance of schedule-induced drinking. Thus, predictions from the opponent-process theory were supported by these findings.