Memory for dangers past: threat contexts produce more consistent learning than do non-threatening contexts

In earlier work we showed that individuals learn the spatial regularities within contexts and use this knowledge to guide detection of threatening targets embedded in these contexts. While it is highly adaptive for humans to use contextual learning to detect threats, it is equally adaptive for individuals to flexibly readjust behaviour when contexts once associated with threatening stimuli begin to be associated with benign stimuli, and vice versa. Here, we presented face targets varying in salience (threatening or non-threatening) in new or old spatial configurations (contexts) and changed the target salience (threatening to non-threatening and vice versa) halfway through the experiment to examine if contextual learning changes with the change in target salience. Detection of threatening targets was faster in old than new configurations and this learning persisted even after the target changed to non-threatening. However, the same pattern was not seen when the targets changed from non-threatening to threatening. Overall, our findings show that threat detection is driven not only by stimulus properties as theorised traditionally but also by the learning of contexts in which threatening stimuli appear, highlighting the importance of top-down factors in threat detection. Further, learning of contexts associated with threatening targets is robust and speeds detection of non-threatening targets subsequently presented in the same context.     

测谎者的无意识加工对谎言识别的影响

在谎言识别研究中, 最重要的发现之一就是人们在意识层面上识别谎言的正确率仅仅略高于随机水平。于是, 大量的研究转而考察无意识加工对谎言识别的影响。本文从测谎者的角度出发, 考察测谎者的无意识加工是否可以提高其谎言识别的正确率。本文梳理了关于无意识谎言识别的理论建构, 总结了无意识谎言识别的实证研究, 从无意识的信息接收、信息接收后的无意识思维以及无意识判断决策三个方面详细介绍了近年来的重要的成果和主要的争议。针对目前研究的困境, 本文提出未来的研究应该重点关注理论建构、交互式谎言情境、线索加工匹配效应、测试生理和脑激活指标以及无意识谎言识别的应用等五个方面。     

Mortality salience reduces attentional bias for fear-relevant animals

This research investigated the influence of reminders of mortality on biased attention for fear-relevant animals across 2 studies. In each study, participants completed a baseline dot-probe test of attention to fear-relevant animals (snakes and spiders). After random assignment, participants completed a mortality salience or control writing task (about watching television in Study 1 and about writing an important exam in Study 2). Finally, participants completed the dot-probe measure a second time. In both studies, those in the mortality salience condition showed a significant reduction in bias for fear-relevant animals from baseline to post-manipulation, whereas no change was found for those in the control conditions. These data suggest that the previously demonstrated lack of emotional response to mortality salience may, in part, result from the avoidance of fear-relevant stimuli.

Attitude accessibility and message processing: The moderating role of message position

Past research suggests that pre-message attitude accessibility can influence the amount of processing of persuasives messages (with highly accessible attitudes eliciting higher levels of processing than attitudes lower in accessibility). The current research suggests that the previous conclusions are only partly true—effects of accessibility on message processing are moderated by the extent to which the persuasive message is proattitudinal versus counterattitudinal. In two experiments, pre-message attitudes and attitude accessibility were measured (Study 1) or manipulated (Study 2) prior to receiving a strong or weak persuasive message. When messages were counterattitudinal, increased pre-message accessibility was associated with greater message processing (as in past research). However, when messages were proattitudinal, increased pre-message accessibility was associated with decreased message scrutiny. Potential underlying mechanisms and implications are discussed.     

An inexpensive infrared detector to verify the delivery of food pellets

The reproducibility of experimental outcomes depends on consistent control of independent variables. In food-maintained operant performance, it is of utmost importance that the quantity of food delivered is reliable. To that end, some commercial food pellet dispensers have add-on attachments to sense the delivery of pellets. Not all companies, however, offer such add-ons. Aside from availability, cost and temporary reduction in throughput may be a problem for smaller labs. The present paper outlines our recent development of a simple, inexpensive infrared device to detect and confirm the delivery of pellets. The in-line construction of the detector routes the falling pellet through a barrel so that it passes between an infrared emitter and receiver. The circuitry was designed to be compatible with all commercially available behavioral measurement systems, and so may be retrofit to any existing system. Our tests with the detector so far have shown that it is 100% accurate in detecting pellet delivery. The individual unit cost is approximately 25 dollars. The low cost and versatility of the device offer an easy method to ensure the integrity of food delivery in operant settings.     

Perceiving one's nation: entitativity, agency and security in the international arena

The perception of groups as real entities rather than mere aggregates of individuals has important consequences on intergroup relations. Social psychological research, in fact, shows that it affects stereotyping, identification process, and intergroup bias. Previous research has also shown that group entitativity is not a positive or negative group attribute per se; rather, it depends on the context and the relationship between the perceiver and the group. While enhancing entitativity leads to worse expectations about the out‐group actions, high entitativity is a valued characteristic when associated with an ally or with the in‐group. Indeed, enhancing in‐group entitativity leads to stronger in‐group identification. The specific reasons for why this is the case, however, remain to be ascertained. What is good about in‐group entitativity? In the present contribution we propose that in‐group entitativity may lead to perceive the group as a real entity provided with intentions and capacity for planned actions, notably ensuring the safety of its members by protecting them against external threats. We report two correlational studies conducted with American citizens (Study 1) and Italian citizens (Study 2), showing that in‐group entitativity is associated with a higher level of identification, attribution of intentionality, and perceived security provided by the in‐group. These findings were replicated in a third study—conducted with a role‐play method on a fictitious scenario—in which entitativity was manipulated rather than measured. Study 3 also shows that artificially increasing the perception of in‐group entitativity enhances perceived safety in an international context and reduces the perception of threat from an out‐group. Findings are discussed in terms of possible implications for intergroup and international relations.     

Sound enhances detection of visual target during infancy: a study using illusory contours

In adults, a salient tone embedded in a sequence of nonsalient tones improves detection of a synchronously and briefly presented visual target in a rapid, visually distracting sequence. This phenomenon indicates that perception from one sensory modality can be influenced by another one even when the latter modality provides no information about the judged property itself. However, no study has revealed the age-related development of this kind of cross-modal enhancement. Here we tested the effect of concurrent and unique sounds on detection of illusory contours during infancy. We used a preferential looking technique to investigate whether audio-visual enhancement of the detection of illusory contours could be observed at 5, 6, and 7 months of age. A significant enhancement, induced by sound, of the preference for illusory contours was observed only in the 7-month-olds. These results suggest that audio-visual enhancement in visual target detection emerges at 7 months of age.     

Can intuition improve deception detection performance?

Two studies examined the role of processing style (intuitive vs. deliberative processing) in a deception detection task. In the first experiment, a thin slicing manipulation was used to demonstrate that intuitive processing can lead to more accurate judgments of deception when compared with traditional deliberative forms of processing. In the second experiment, participants who engaged in a secondary (concurrent) task performed more accurately in a deception detection task than participants who were asked to provide a verbal rationale for each decision and those in a control condition. Overall, the results converge to suggest that intuitive processing can significantly improve deception detection performance.     

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.     

The extent of active processing of a long-duration stimulus modulates the scalp-recorded sustained potential

A long-duration stimulus will elicit a negative sustained potential (SP) that is maximum in amplitude over fronto-central areas of the scalp. This study examines how the duration of active attentional processing of the stimulus might also elicit a nonsensory contingent negative variation (CNV) that overlaps and summates to the SP. Subjects were presented with either a low- or high-pitched 1.4s duration stimulus. In different conditions, a 20 ms gap occurred either 300 or 1300 ms after stimulus onset in half the stimuli. The subject's task was to button press upon detection of the gap in the low-pitched stimulus. The subject was not required to respond to the gap occurring in the high-pitched tone. In a separate Ignore condition, subjects ignored all stimuli and read a book. In the Ignore condition, a SP was apparent to the long-duration stimuli. In the Attend condition, a large amplitude slow wave, probably the CNV, overlapped and summated with the SP. The extent of the overlapping CNV was dependent on whether the gap occurred early or late. The CNV was not apparent following presentation of the high-pitched tone, when the gap did not need to be detected. Consistent with previous studies, a SP was thus elicited even when active processing of the stimulus was not required. The morphology of the scalp-recorded SP was, nevertheless, much modified by an overlapping and summating CNV, depending on the extent to which active processing of the long-duration stimulus was required.