Superstitious perception: Response-independent reinforcement and punishment as determinants of recurring eccentric interpretations

This study provided controlled observations of a potential mechanism for the determination of the repetitive, aberrant perceptions or interpretations of everyday events that figure prominently in a range of psychological disorders: the adventitious reinforcement of acts of cognition by the actual consequences of concurrent motor acts. Adults made a series of two-choice brightness discriminations; on 60% of trials, choosing the brighter stimulus produced a “correct” signal while errors produced an aversive sound. On 40% of trials, the choice stimuli did not in fact differ in brightness; the consequences of responding on these “identical stimuli” trials differed across blocks of trials. Thus, on these trials perceptual judgments were directly followed by events that they did not produce. When all choices on identical stimuli trials were punished with the “error” sound, subjects showed little preference for the left-side or right-side identical stimuli, but when all choices of identical stimuli were reinforced with the “correct” light, individual preferences for the left-side or the right-side stimuli substantially increased. As the consequences of responding on identical stimuli trials were independent of the stimuli chosen, these findings provide evidence for superstitious perception, the reinforcement of perceptual acts by events that do not depend upon their occurrence.     

Children’s multiplicative transformations of discrete and continuous quantities

Recent studies have documented an evolutionarily primitive, early emerging cognitive system for the mental representation of numerical quantity (the analog magnitude system). Studies with nonhuman primates, human infants, and preschoolers have shown this system to support computations of numerical ordering, addition, and subtraction involving whole number concepts prior to arithmetic training. Here we report evidence that this system supports children’s predictions about the outcomes of halving and perhaps also doubling transformations. A total of 138 kindergartners and first graders were asked to reason about the quantity resulting from the doubling or halving of an initial numerosity (of a set of dots) or an initial length (of a bar). Controls for dot size, total dot area, and dot density ensured that children were responding to the number of dots in the arrays. Prior to formal instruction in symbolic multiplication, division, or rational number, halving (and perhaps doubling) computations appear to be deployed over discrete and possibly continuous quantities. The ability to apply simple multiplicative transformations to analog magnitude representations of quantity may form a part of the toolkit that children use to construct later concepts of rational number.     

Can bad weather improve your memory? An unobtrusive field study of natural mood effects on real-life memory

Can good or bad mood induced by the weather influence people’s ability to correctly remember everyday scenes? In this unobtrusive field study, we predicted and found that weather-induced negative mood improved memory accuracy. Randomly selected shoppers on bright, sunny days (good mood) or on cloudy, rainy days (bad mood) saw 10 unusual objects in the check-out area of a suburban shop, and their recall and recognition memory for these objects was later tested. Shoppers in a negative mood showed better memory and higher discrimination ability. The cognitive mechanisms responsible for everyday mood effects on memory performance are discussed, and the implications of these findings for current affect/cognition theories and applied areas are considered.     

Embodied communication: Speakers’ gestures affect listeners’ actions

We explored how speakers and listeners use hand gestures as a source of perceptual-motor information during naturalistic communication. After solving the Tower of Hanoi task either with real objects or on a computer, speakers explained the task to listeners. Speakers’ hand gestures, but not their speech, reflected properties of the particular objects and the actions that they had previously used to solve the task. Speakers who solved the problem with real objects used more grasping handshapes and produced more curved trajectories during the explanation. Listeners who observed explanations from speakers who had previously solved the problem with real objects subsequently treated computer objects more like real objects; their mouse trajectories revealed that they lifted the objects in conjunction with moving them sideways, and this behavior was related to the particular gestures that were observed. These findings demonstrate that hand gestures are a reliable source of perceptual-motor information during human communication.     

The effects of justice motivation on memory for self- and other-relevant events

We examined whether people might distort and selectively remember the past in ways that enable them to sustain a belief in a just world (BJW; Lerner, M. J. (1980). The belief in a just world: A fundamental delusion. New York: Plenum Press). In Study 1, recall of a lottery prize reflected participants’ justice concerns, such that the average lottery amount recalled was lowest when a “bad” versus “good” person won. In Study 2, an unrelated experience of just world threat (versus affirmation) enhanced biased recall of the lottery prize when the winner was undeserving. In Study 3, participants who experienced a fortuitous bad break selectively remembered more bad deeds from their recent past, whereas participants who experienced a good break selectively remembered more good deeds. Study 4 demonstrates that such selective memory biases specifically serve to portray chance outcomes as more fair. Taken together, these findings offer support for the notion that reconstructing and selectively recalling the past can serve to sustain a BJW.     

Threat causes liberals to think like conservatives

In Study 1, politically liberal college students’ in-group favoritism increased after a system-injustice threat, becoming as pronounced as that of conservatives. Studies 2 and 3 conceptually replicated these results with low preference for consistency [Cialdini, R. B., Trost, M. R., & Newsom, J. T. (1995). Preference for consistency: The development of a valid measure and the discovery of surprising behavioral implications. Journal of Personality and Social Psychology, 69, 318-328.] as a dispositional measure of liberalism. In Study 2, following a mortality salience threat, dispositionally liberal students showed as much conviction in their attitudes toward capital punishment and abortion as dispositional conservatives did. In Study 3, after a mortality salience threat, liberal students became as staunchly unsupportive of homosexuals as conservatives were. The findings that political and dispositional liberals become more politically and psychologically conservative after threats provide convergent experimental support for the [Jost, J. T., Glaser, J., Kruglanski, A. W., & Sulloway, F. J. (2003). Political conservatism as motivated social cognition. Psychological Bulletin, 129 339-375.] contention that conservatism is a basic form of motivated social cognition.     

A pox on the mind: Disjunction of attention and memory in the processing of physical disfigurement

The unfavorable treatment of people with physical disfigurements is well-documented, yet little is known about basic perceptual and cognitive responses to disfigurement. Here, we identify a specialized pattern of cognitive processing consistent with the hypothesis that disfigurements act as heuristic cues to contagious disease. Disfigurements are often invariant across time and difficult to conceal, and thus observers can detect the presence of such cues without necessarily remembering the particular individuals bearing these cues. Indeed, despite the fact that disfigured faces were especially likely to hold disease-sensitive perceivers’ attention (Study 1), disfigured individuals were often confused with one another and thus not well remembered later (Study 2), revealing a disjunction of the typical relationship between elevated attention and elevated memory. We discuss the implications of our results for stigmatization of people with and without physical abnormalities and suggest the possibility that cognitive mechanisms for processing social information may be functionally tuned to the variant nature of important cues.     

Person perception by active versus passive perceivers

Person perception research is dominated by studies of passive perceivers who exert no control over the information they receive. In contrast, perceivers in everyday life can often actively choose the type and quantity of information they receive. In this study, active and yoked passive perceivers formed impressions of individuals based on information from Facebook. Compared to active perceivers, passive perceivers reported greater confidence and ease in their judgments. Passive perceivers exhibited greater confidence (though not greater accuracy) with increased information, but active perceivers did not show this effect, placing a boundary condition on past research. Passive perceivers also liked targets more than active perceivers, a finding that is not explained by valence-dependant sampling by active participants, or by misattribution of fluency or greater sensitivity among passive participants. These provocative findings highlight the need to account for active and interactive processes in person perception rather than continuing to focus on passive perceivers.     

The Wisdom of Individuals: Exploring People's Knowledge About Everyday Events Using Iterated Learning

Determining the knowledge that guides human judgments is fundamental to understanding how people reason, make decisions, and form predictions. We use an experimental procedure called 'iterated learning,' in which the responses that people give on one trial are used to generate the data they see on the next, to pinpoint the knowledge that informs people's predictions about everyday events (e.g., predicting the total box office gross of a movie from its current take). In particular, we use this method to discriminate between two models of human judgments: a simple Bayesian model ( Griffiths & Tenenbaum, 2006 ) and a recently proposed alternative model that assumes people store only a few instances of each type of event in memory (Min K ; Mozer, Pashler, & Homaei, 2008 ). Although testing these models using standard experimental procedures is difficult due to differences in the number of free parameters and the need to make assumptions about the knowledge of individual learners, we show that the two models make very different predictions about the outcome of iterated learning. The results of an experiment using this methodology provide a rich picture of how much people know about the distributions of everyday quantities, and they are inconsistent with the predictions of the Min K model. The results suggest that accurate predictions about everyday events reflect relatively sophisticated knowledge on the part of individuals.     

愿望采择发展水平对幼儿情感决策的影响

选取148名4岁儿童, 运用实验法考察了幼儿的愿望采择发展水平对其情感决策的影响。结果表明: (1) 幼儿的愿望采择水平对其情感决策具有显著影响。情境中他人愿望信息充足时, 幼儿会采择他人愿望并以此为线索为他人决策, 但对线索的利用程度受其愿望采择水平的制约。(2) 在无关于他人愿望信息提示的条件下, 4岁儿童为他人与为自己的情感决策不存在显著差异。(3) 4岁儿童能够采择他人的单一愿望, 但其冲突愿望采择能力还不成熟。