Does traffic congestion increase driver aggression?

In his recent article about aggressive driving, David Shinar proposed that the classical frustration-aggression hypothesis (Dollard, J., Doob, L., Miller, N., Mowrer, O. & Sears, R. (1939). Frustration and aggression. New Haven, CN: Yale University Press) provides a useful tool for understanding driver aggression (Shinar, D. (1998). Aggressive driving: the contribution of the drivers and situation. Transportation Research Part F, 1, 137–160). According to Shinar's (1998) application of the frustration–aggression hypothesis, driver aggression is caused by frustration because of traffic congestion and delays. In the present study, the relationships between exposure to congestion (rush-hour driving) and aggressive violations (DBQ) were investigated in Great Britain, Finland and the Netherlands. Partial correlations showed that the frequency of rush-hour driving did not correlate statistically significantly with driver aggression. Correlations between driving during rush-hour and aggression did not differ in magnitude from those between driving on country roads and aggressive violations. In addition, correlations between exposure to congestion and aggressive violations in countries with large number of vehicles per road kilometre (UK, Netherlands) were not higher than those in a sparsely populated country (Finland). These results from three countries suggest that congestion does not increase driver aggression as directly as suggested by Shinar (1998).     

Does democracy increase suicide and homicide rates?

Changes in the measures for the level of democracy in 34 nations from 1965 to 1980 were positively associated with the percentage change in the homicide rate over 30 nations.     

Do lateral eye movements increase susceptibility to misinformation? A registered replication

Psychonomic Bulletin & Review -     

Does direct human eye contact function as a warning cue for domestic sheep (Ovis aries)?

Direct eye contact may function as a warning cue during interspecific interactions, and human staring has been shown to influence the behavior of many species. The authors used an arena test to assess whether human staring altered the behavior of domestic sheep (Ovis aries) compared with no human eye contact. Sheep glanced at the staring human's face more often in the first 2 min of the test, indicating that they perceived a difference between the human stimuli. Staring also elicited more locomotor activity and urination than averted gaze. However, there were no differences in fear-related behaviors, suggesting that a staring human did not represent a greater immediate threat than a nonwatching human. These results imply that human staring is a warning cue for domestic sheep, but no more. Without further reinforcement, sheep quickly habituated to the warning cue.     

Does augmented feedback from pedometers increase adults' walking behavior?

This study investigated whether feedback from pedometers motivated adults to increase their walking behavior. Participants (n =26) were enrolled in one of two 8-wk. "Walking for Fitness" classes. The study used a crossover design, such that Group 1 wore pedometers for the first 3 weeks (Feedback Condition) and sealed "disguised" pedometers for the last 3 weeks (No-feedback Condition). The order of feedback was reversed for Group 2. Analysis indicated that (a) neither group increased their walking behavior significantly over time and, (b) interactions between groups were not significant at Week 3 or 6, indicating that groups did not respond differently to feedback from the pedometers. If a motivational effect from pedometers exists, it may be small, dissipate before 3 wk., only work in combination with goal setting, or only motivate certain types of individuals.     

Does self-consciousness increase or decrease priming effects? It depends

Self-consciousness has been shown to both increase and decrease the magnitude of prime-to-behavior effects. In this paper, we decouple the facets of self-consciousness into internal state awareness and self-reflectiveness and show that self-consciousness can be associated with multiple influences on automatic behavior. Specifically, we conducted an experiment demonstrating that increased internal state awareness decreased the magnitude of the prime-to-behavior effect, whereas increased self-reflectiveness amplified the effect. These effects operated independently of self-monitoring and suggest a multiple process approach to understanding prime-to-behavior effects.     

Does temporal preparation increase the rate of sensory information accumulation?

Recent studies showed that temporal preparation, i.e., the ability to prepare for an upcoming stimulus, improves perceptual processing. The mechanisms underlying this benefit are still controversial. Based upon the theoretical framework of accumulation models, it has been proposed that the accumulation of sensory stimulus information begins earlier when participants are temporally prepared than when they are unprepared. Alternatively, however, temporal preparation might also affect the accumulation rate of sensory information. In the present study, we examined these possibilities. Specifically, in three experiments, we manipulated participants' decision criterion. This manipulation should interact with any experimental manipulation affecting the rate of information processing, but produce additive effects with any manipulation affecting the onset of information accumulation rather than its rate. We obtained additive effects on RT, irrespective of whether the decision criterion was manipulated by increasing catch trial proportion or nogo trial proportion. These results suggest that temporal preparation improves perceptual processing by operating on the onset of sensory information accumulation rather than the rate of sensory information accumulation.     

Does medics' social identification increase handicap for mentally retarded patients?

Briefs about mentally retarded people are more negative than briefs about other social categories; professionals, such as medical doctors evaluate them most negatively of all. It was hypothesized (a) that medics' beliefs about mentally retarded people are mediated by psychological salience of their clinical social identification, rather than by personal characteristics that medics happen to share and (b) that such beliefs will bias decisions, rather than enhance accuracy. Forty-five doctors and medical students were randomly assigned to conditions designed to enhance salience of their shared clinical social identification or individual self-perceptions. Subjects completed semantic differentials about mentally retarded people and distinguished between slides of ‘mentally retarded’ and ‘normal’ children. Beliefs of subjects in the medical condition were significantly more negative than those in the personal condition. A signal detection analysis revealed no difference between conditions in subjects' ability to distinguish between children but showed that subjects in the medical condition were significantly more likely to judge a child ‘mentally retarded’ when in doubt. Results were discussed within an information processing framework and supported the idea that a salient clinical social identity can mediate beliefs that are likely to handicap patients.     

Does group efficacy increase group identification? Resolving their paradoxical relationship

Although group identification and group efficacy are both important predictors of collective action against collective disadvantage, there is mixed evidence for their (causal) relationship. Meta-analytic and correlational evidence suggests an overall positive relationship that has been interpreted as consistent with the idea that group identification leads to group efficacy. However, experimental evidence has not supported this causal relationship. To resolve this paradox, we show in an experiment that it is group efficacy that leads to increased group identification because group efficacy puts individuals' identity into action. We discuss the theoretical and practical implications of these findings.     

Does intergroup contact affect personality? A longitudinal study on the bidirectional relationship between intergroup contact and personality traits

We conducted a longitudinal study to test whether, in addition to being predicted by personality, intergroup contact is longitudinally associated with personality traits. Participants were 388 majority (Italian) and 109 minority (immigrant) first‐year high school students. Results revealed a bidirectional relationship between contact and personality: Quality of contact was longitudinally associated with greater agreeableness and openness to experience, whereas agreeableness and openness to experience were longitudinal predictors of contact quality. An unexpected negative longitudinal association also emerged between quantity of contact and agreeableness. These effects were not moderated by group of belonging (majority vs. minority). Our findings highlight the importance of integrating research on intergroup contact with research on personality.     

Does word training increase or decrease interference in a stroop task?

First and second graders (6- and 7-year-olds) practiced reading 20 words. Before and after word training, they named pictures printed with and without these words as distractors. Of interest was whether training would enhance or diminish the interference created by these words in the picture-naming task. Results indicated that children who learned to recognize unfamiliar distractor words more accurately suffered more interference after training. In contrast, children who were already familiar with the words and learned to recognize them faster experienced less interference following training. Results are interpreted as supporting LaBerge and Samuels' model of automatic word processing. Effects of accuracy training are attributed to the elimination of attention as a requirement for processing distractor words. Effects of speed training are attributed to a reduction in the time consumed by distractor words in the central processor.     

The effect of drivers’ eye contact on pedestrians’ perceived safety

Many fatal accidents that involve pedestrians occur at road crossings, and are attributed to a breakdown of communication between pedestrians and drivers. Thus, it is important to investigate how forms of communication in traffic, such as eye contact, influence crossing decisions. Thus far, there is little information about the effect of drivers’ eye contact on pedestrians’ perceived safety to cross the road. Existing studies treat eye contact as immutable, i.e., it is either present or absent in the whole interaction, an approach that overlooks the effect of the timing of eye contact. We present an online crowdsourced study that addresses this research gap. 1835 participants viewed 13 videos of an approaching car twice, in random order, and held a key whenever they felt safe to cross. The videos differed in terms of whether the car yielded or not, whether the car driver made eye contact or not, and the times when the driver made eye contact. Participants also answered questions about their perceived intuitiveness of the driver’s eye contact behavior. The results showed that eye contact made people feel considerably safer to cross compared to no eye contact (an increase in keypress percentage from 31% to 50% was observed). In addition, the initiation and termination of eye contact affected perceived safety to cross more strongly than continuous eye contact and a lack of it, respectively. The car’s motion, however, was a more dominant factor. Additionally, the driver’s eye contact when the car braked was considered intuitive, and when it drove off, counterintuitive. In summary, this study demonstrates for the first time how drivers’ eye contact affects pedestrians’ perceived safety as a function of time in a dynamic scenario and questions the notion in recent literature that eye contact in road interactions is dispensable. These findings may be of interest in the development of automated vehicles (AVs), where the driver of the AV might not always be paying attention to the environment.     

Does eye gaze indicate implicit knowledge of false belief? Charting transitions in knowledge

Three-year-olds sometimes look to the correct location but give an incorrect verbal answer in a false belief task. We examined whether correct eye gaze among 3- to 5-year-old children indexed unconscious knowledge or low confidence conscious knowledge. Children "bet" counters on where they thought a story character would go. If children were conscious of the knowledge conveyed by their eye gaze then they should have bet modestly on their explicit answer (i.e., been unsure whether this answer or the answer conveyed through eye direction was correct). We found that children bet very highly on the location consistent with their explicit answer, suggesting that they were not aware of the knowledge conveyed through their eye gaze. This result was supported by a number of conditions that showed that betting was a sensitive measure of even small degrees of uncertainty. The results shed light on false-belief understanding, the implicit-explicit distinction, and transitional knowledge. We argue that the transition to a full understanding of false belief is marked by periods of implicit knowledge and explicit understanding with low confidence.     

Does increasing the warning signal intensity decrease or increase simple reaction time?

The purpose of the study was to reconcile the contradictory evidence reporting either a shortening or lengthening of the simple reaction time (RT) as a function of the intensity of a warning signal. The lengthening of auditory RT is obtained when short visual or auditory warning signals are of constant intensity within a session and succeeded by a fore-period. Visual RT did not vary under similar circumstances. There was no effect when a warning signal of constant intensity overlapped in time with the response stimulus. The shortening of RT occurred with auditory warning signals of variable intensity and overlapping in time with the response stimulus. The shortening of RT was interpreted as facilitation-by-arousal. The lengthening of RT is a contextual effect but the data do not support accounts based on sensory-neural adaptation or criterion changes.     

Does conspicuity enhance distraction? Saliency and eye landing position when searching for objects

While visual saliency may sometimes capture attention, the guidance of eye movements in search is often dominated by knowledge of the target. How is the search for an object influenced by the saliency of an adjacent distractor? Participants searched for a target amongst an array of objects, with distractor saliency having an effect on response time and on the speed at which targets were found. Saliency did not predict the order in which objects in target-absent trials were fixated. The within-target landing position was distributed around a modal position close to the centre of the object. Saliency did not affect this position, the latency of the initial saccade, or the likelihood of the distractor being fixated, suggesting that saliency affects the allocation of covert attention and not just eye movements.     

Does contact at work extend its influence beyond prejudice? Evidence from healthcare settings

This article reports on two studies investigating the role of intergroup contact on the reduction of prejudice against migrants and on organizational and health outcomes. Study 1 enrolled 624 native healthcare professionals and showed that frequent and positive contact with non-native co-workers was associated with a decrease in the professionals’ prejudice and an increase in the professionals’ perception of team functioning. These effects were mediated by reduced in-group threat perception. Study 2 enrolled 201 native patients and showed that frequent and positive contact with non-native healthcare providers was associated with a decrease in patients’ prejudice and an increase in patients’ satisfaction for the care received. These effects were mediated by reduced in-group threat perception. These novel findings showed that frequent and positive contact with non-native individuals can improve health and organizational outcomes along with facilitating positive intergroup relations.     

Does the eye know calculus? The threshold of representation in classical and connectionist models

The notion of representation lies at the crossroads of questions about the nature of belief and knowledge, meaning, and intentionality. But there is some hope that it might be simpler than all those. If we could understand it clearly, it might then help to explicate those more difficult notions. In this paper, my central aim is to find a principled criterion, along lines that make biological sense, for deciding just when it becomes theoretically plausible to ascribe to some process or state a representational role. I shall be especially concerned with some differences, in this regard, between classical and connectionist models. The relation between ‘standard’ artificial intelligence and connectionism turns out to illustrate a ‘first in, last out’ principle: What we most easily understand (and so can program) is what we have most recently invented; tasks we ourselves perform best, by contrast, are a lot harder to understand. Classical AI has modelled the former; connectionism tries to tackle the latter. I end with some speculations about the possible implications of these considerations for our understanding of understanding.     

Does prior exposure to interpersonal violence increase risk of PTSD following subsequent exposure?

Research has generally found a “dose relationship” between potentially traumatic events (PTEs) and the likelihood of developing PTSD, with greater number of events associated with greater likelihood. Most of these studies have been cross-sectional, however. A recent prospective study (Breslau, Peterson, & Schultz, 2008) found that PTSD response to prior potentially traumatic event (PTE) exposure, rather than prior exposure itself, acts as a risk factor for PTSD in response to subsequent PTE; however, this analysis combined many different types of events, and the unique contribution of specific events (e.g., assault) that may be associated with differential risk of PTSD was indeterminable. The present study examined the effects of cumulative PTE exposure prospectively using a two-wave design in the National Survey of Adolescents (N = 1703). History of assault and witnessing serious violence were the focal PTEs examined. Wave I assault without PTSD was found to predict PTSD at Wave II following exposure to new assault or witnessed violence; however, among those without prior PTSD, Wave I witnessed violence did not increase risk of subsequent PTSD following exposure.     

Severity of initiation revisited: Does severity of initiation increase attractiveness in real groups?

In the Netherlands, two longitudinal fieldstudies (N=202 and N=46) were conducted on the relationship between severity of initiation and group attractiveness. Study 1 represents a severe initiation, Study 2 a more mild one. In these two different field ‘conditions’ we aimed to test the dissonance interpretation of the effects of a severe initiation (Aronson & Mills, 1959) and a positive correlation between severity of treatment of the initiated novices and group attractiveness was expected (hypothesis 1). Further, we expected that feelings of frustration and anger would mediate this relationship (hypothesis 2). On the other hand, our affiliation–attraction hypothesis either predicted a positive correlation between companionship (Rook, 1987) and group attractiveness, irrespective of severity (hypothesis 3), or that companionship would mediate the severity–attraction relationship (hypothesis 4). In both studies, LISREL path analyses only supported hypothesis 3. Contrary to hypothesis 1, severity experienced during the early stages of the initiation correlated with feelings of frustration and loneliness (Study 1), or depressive mood (Study 2). These feelings lasted throughout the initiation and lowered the liking for the group. Results are discussed in terms of newcomers' decisions to leave or to join the group, determined by (i) the exchange and fate control relationship between the leadership and the newcomers; (ii) the severe treatment of newcomers as a selection device and (iii) companionate exchanges among the initiated newcomers as a basis for ingroup formation. © 1997 by John Wiley & Sons, Ltd.