Is overall similarity classification less effortful than single-dimension classification?

It is sometimes argued that the implementation of an overall similarity classification is less effortful than the implementation of a single-dimension classification. In the current article, we argue that the evidence securely in support of this view is limited, and report additional evidence in support of the opposite proposition—overall similarity classification is more effortful than single-dimension classification. Using a match-to-standards procedure, Experiments 1A, 1B and 2 demonstrate that concurrent load reduces the prevalence of overall similarity classification, and that this effect is robust to changes in the concurrent load task employed, the level of time pressure experienced, and the short-term memory requirements of the classification task. Experiment 3 demonstrates that participants who produced overall similarity classifications from the outset have larger working memory capacities than those who produced single-dimension classifications initially, and Experiment 4 demonstrates that instructions to respond meticulously increase the prevalence of overall similarity classification.     

甲状腺腔镜手术与开放性手术的比较

通过探讨腔镜甲状腺手术与开放甲状腺手术之间的差异,正确选择手术方式,回顾分析2008年6月至2013年2月在我院的162例行腔镜甲状腺手术患者与162例行开放甲状腺手术患者,比较住院时间、住院费用、手术时间、术中出血量、引流管引流总量、引流管拔管时间及术后并发症情况.结果162例腔镜手术均成功完成,无一例中转开放手术,腔镜手术住院时间、住院费用、手术时间、术中出血量、引流管引流总量均较开放手术多,术后1例发生短暂性喉返神经麻痹,14例胸部皮肤感觉麻木.因此,开放与腔镜甲状腺手术都是安全可靠的,腔镜手术具有确切的美容效果,但不是首选术式,不应盲目扩大腔镜手术群体,把握腔镜手术对象,以患者实际情况为出发点,以开放手术为主,节约医疗资源.     

Predicting Burnout Among HIV/AIDS and Oncology Health Care Workers

Abstract

This study examined the relationship between repressive coping, controllability, self-esteem and comparative optimism for health-related events. Repressors (low trait anxiety-high defensiveness) compared with both (a) specific control groups on anxiety and defensiveness (e.g., low-anxious, high-anxious and defensive high anxious) and (b) total nonrepressors were significantly more comparatively optimistic for health-related events. Repressors remained significantly more comparatively optimistic than total nonrepressors when self-esteem was partialled out.

For individual events, repressors differed in comparative optimism for events which were rated as high controllability. It is concluded that repressors are exhibiting comparative optimism over and above nonrepressor groups for events which are rated as controllable. These results suggest that comparative optimism findings may be exaggerated by not controlling for the disproportionate influence of repressors in skewing sample means. Suggestions for future studies are discussed.     

Associations between abstainer,moderate and heavy drinker prototypes and drinking behaviour in young adults

Objective: Previous research has focused mostly on abstainer and/or general drinker prototypes. The present studies examined an abstainer, moderate drinker and heavy drinker prototype in relation to drinking behaviour.

Design: Two studies among young adults aged 18–25 (paper-and-pencil, cross-sectional, N?=?140; online, prospective, N?=?451) assessed prototype favourability and participants’ perceived similarity to the prototypes. Participants were also categorised into abstainers, moderate, and heavy drinkers.

Results: Similarity and favourability had similar sequences in both studies: the moderate drinker and abstainer prototypes were evaluated most favourable and felt similar to; the heavy drinker prototype was rated the least favourable and felt similar to. Importantly, heavy drinking participants felt most similar to the moderate drinker prototype and rated the heavy drinker least desirable. The results suggest a need for research to include other prototypes, such as the moderate drinker, besides the abstainer and heavy drinker.

Conclusion: The studies provide insights into the contribution of alternative prototypes (i.e. moderate drinker) into the relationship between prototype perceptions and drinking behaviour. The results suggest tailoring prototype-based interventions according to drinking behaviour. Importantly, realistic perceived similarity to the more favourable moderate drinker prototype may therefore need to be encouraged only after appropriate reductions in heavy drinkers’ alcohol consumption.     

A Psychogenic Study of Dark-Adaptation

Skin conductance responses (SCRs), heart rate (HR), and respiration were recorded in various rest, cold pressor (CP), and CP recovery phases in 20 former drug users (DG) and 20 control Ss (CG), matched on sex and age in a repeated measures design. With regard to the abused drugs (barbiturates and narcotic analgesics), the hypothesis was tested that autonomic responses are decreased after long-term use of barbiturates and narcotic analgesics. The results partially supported that hypothesis: (a) SCRs, HR change, and HR deceleration were significantly lower in DG compared to control Ss; (b) HR baseline, respiration rate, and amplitude, however, tended to be increased in DG in the rest and CP phases. A second hypothesis, addressed to different habituation rates of SCRs and HR in both groups, was confirmed for SCRs and partly for HR, indicating that the habituation rates of SCRs, HR change, and HR deceleration were greater in DG than in CG. A third question concerned the consistency of SCR and HR results in both sessions. A trend for consistent results was found as the direction of the group differences was the same in sessions 1 and 2. The CP results were compared with similar findings in the same Ss during visual and auditory stimulation.     

Morphological constraints in children’s spoken language comprehension: A visual world study of plurals inside compounds in English

Many previous studies have shown that the human language processor is capable of rapidly integrating information from different sources during reading or listening. Yet, little is known about how this ability develops from child to adulthood. To gain insight into how children (in comparison to adults) handle different kinds of linguistic information during on-line language comprehension, the current study investigates a well-known morphological phenomenon that is subject to both structural and semantic constraints, the plurals-in-compounds effect, i.e. the dislike of plural (specifically regular plural) modifiers inside compounds (e.g. rats eater). We examined 96 seven-to-twelve-year-old children and a control group of 32 adults measuring their eye-gaze changes in response to compound-internal plural and singular forms. Our results indicate that children rely more upon structural properties of language (in the present case, morphological cues) early in development and that the ability to efficiently integrate information from multiple sources takes time for children to reach adult-like levels.     

The divisive potential of differences and similarities: The role of intergroup distinctiveness in intergroup differentiation

In this article we examine the relationship between perceptions of intergroup distinctiveness and intergroup differentiation. Research in this area has highlighted two contrasting hypotheses: high distinctiveness is predicted to lead to increased intergroup differentiation (self-categorisation theory), while low distinctiveness or too much similarity can also underlie positive differentiation (social identity theory). We argue for a theoretical integration of these predictions and outline their domains of applicability. In addition to empirical studies from our own laboratory, support for these hypotheses in the literature is examined meta-analytically, and we assess the power of a number of moderators of the distinctiveness ‐ differentiation relation. We focus on group identification and salience of the superordinate category as the most powerful moderators of this relation. We report evidence that low group distinctiveness leads to more differentiation for high identifiers, while high group distinctiveness leads to more differentiation for low identifiers. In addition, our meta-analysis revealed that when the superordinate category was not salient, low distinctiveness tended to lead to differentiation (albeit not significantly so) while high distinctiveness led to differentiation when the salience of the superordinate category was high. A model is proposed integrating our predictions concerning moderators of the distinctiveness ‐ differentiation relation. Theoretical implications of these findings are discussed and we suggest directions for future research.     

The online processing of only if and even if conditional statements: Implications for mental models

A sentential connective like only if or even if merges two simple propositions into a complex statement. This study used a visual world paradigm experiment to explore how this merging process proceeds online. We first presented participants with a short animation, illustrating different simple propositions that are possible to be merged by the sentential connectives. We then auditorily played an only if or an even if statement and recorded participants' eye movements on the concurrent test image. We observed that hearing the sentential connective results in more fixations on the tokens of the appropriate propositions that are eligible to be merged by the sentential connective. Each sentential connective elicited anticipatory effect suggests that once they heard the sentential connective, participants knew which propositions could be merged. We then discussed the implications of our results to the mental model theory of conditionals and the experimental studies reported in literature.     

Catching the liar as a matter of justice: Effects of belief in a just world on deception detection accuracy and the moderating role of mortality salience

Belief in a just world has been linked to high interpersonal trust and less suspicion of deception. We therefore predicted people with a strong dispositional belief in a just world to have low motivation to accurately detect deception. Accordingly, we hypothesized such a belief to be negatively related to accuracy in deception detection. Furthermore, research on Terror Management Theory has indicated that culturally shared values, such as justice, become more important after mortality salience. Thus, we assumed engaging in justice concerns after a death threat is especially relevant for people with a strong belief in a just world, and further, that accurate deception detection is a matter of justice. Based on this reasoning, we expected people with a strong belief in a just world to have an increased motivation to accurately detect deception after mortality salience. Consequently, we hypothesized dispositional differences in belief in a just world to be unrelated to accuracy in deception detection after mortality salience. In line with these predictions, our study revealed that participants with a strong (vs. weak) belief in a just world were worse in deception detection unless they had first been reminded of their mortality.     

Long-term focus and prosocial–antisocial tendencies interact to predict belief in just world

According to justice motive theory, individuals need to believe that the world is a just place where people generally get what they deserve (Lerner, 1977). Individuals are thought to need belief in a just world (BJW) in part because it gives them the confidence required to invest in long-term goals. However, BJW can only provide confidence that individuals will reap the rewards of their investments if they invest in their goals through prosocial means (e.g., Hafer, 2000). The current study provides evidence for this argument. Specifically, we examined individual differences in BJW, long-term goal focus, and prosocial–antisocial tendencies to test the hypothesis that higher long-term focus would be associated with higher BJW, but only amongst those who are also high in prosocial (low in antisocial) tendencies. This hypothesis was tested four times using four measures of prosocial–antisocial tendencies. Simple slopes analyses revealed the predicted pattern of results for three of the four measures. Our findings (a) provide novel support for the idea that BJW aids in the prosocial pursuit of long-term goals, and (b) have implications for individual variation in BJW.