Money for microbes—Pathogen avoidance and out‐group helping behaviour

Humans have evolved various adaptations against pathogens, including the physiological immune system. However, not all of these adaptations are physiological: the cognitive mechanisms whereby we avoid potential sources of pathogens—for example, disgust elicited by uncleanliness—can be considered as parts of a behavioural immune system (BIS). The mechanisms of BIS extend also to inter‐group relations: Pathogen cues have been shown to increase xenophobia/ethnocentrism, as people prefer to keep their societal in‐group norms unaltered and “clean.” Nonetheless, little is known how pathogen cues influence people's willingness to provide humanitarian aid to out‐group members. We examined how pathogen cues affected decisions of providing humanitarian aid in either instrumental (sending money) or non‐instrumental form (sending personnel to help, or accepting refugees), and whether these effects were moderated by individual differences in BIS sensitivity. Data were collected in two online studies (Ns: 188 and 210). When the hypothetical humanitarian crisis involved a clear risk of infection, participants with high BIS sensitivity preferred to send money rather than personnel or to accept refugees. The results suggest that pathogen cues influence BIS‐sensitive individuals' willingness to provide humanitarian aid when there is a risk of contamination to in‐group members.     

Working memory in very-low-birthweight children at the age of 11 years

The aim of this study is to investigate the working memory (WM) of very-low-birthweight (VLBW, ≤ 1500 g) children at the age of 11 years using Baddeley’s WM model. A regional cohort of 95 VLBW children was assessed for the domains of the WM model (central executive [CE], visuospatial sketchpad [VS], and phonological loop [PL]) using subtests from the Working Memory Test Battery for Children (WMTB-C) and the Wechsler Intelligence Scale for Children – Fourth Edition (WISC-IV). VLBW children were categorized into three groups according to their degree of brain pathology (normal, minor, or major) in neonatal brain magnetic resonance imaging at the term age, and the WM performance was compared between groups to test norms. The structure of the WM model was studied by analyzing correlations among domains. Even VLBW children with normal cognitive development (general ability index ≥ 85) performed worse compared to the test norms (M = 100, SD = 15) on CE (M = 87.64, SD = 20.54, p < .001) and VS (M = 91.65, SD = 11.03, p < .001), but their performance on PL was above the norm (M = 110.79, SD = 13.79, p < .001). VLBW children with major brain pathology performed significantly worse on VS and PL compared to the other groups. The correlations among the WM domains of the VLBW children differ from earlier findings in normative populations. To conclude, the WM of the VLBW children in the study differ—especially in the CE and VS subtest scores—from the normative population irrespective of the degree of brain pathology and level of cognitive development.     

Professionals’ Reflections About the Impact of Digital Technologies on Eating Disorders

The aim of this study was to explore how professionals working with clients who suffer from eating disorders reflect the impact of digital technologies on their clients. Interviews with 30 professionals were conducted. A qualitative analysis revealed the following areas: (a) the attributes of technologies that influence people with eating disorders, (b) the characteristics of people with eating disorders that influence their interaction with digital technologies, (c) the risks of technology usage, and (d) the benefits of technology usage. The results are discussed with respect to the Rodgers’s theoretical model explaining technology–eating disorder relations and the implications for practice.     

Spatial navigation deficits in amnestic mild cognitive impairment with neuropsychiatric comorbidity

Aims: To find out whether neuropsychiatric comorbidity (comMCI) influences spatial navigation performance in amnestic mild cognitive impairment (aMCI).

Methods: We recruited aMCI patients with (n = 21) and without (n = 21) neuropsychiatric comorbidity or alcohol abuse, matched for global cognitive impairment and cognitively healthy elderly participants (HE, n = 22). They completed the Mini-Mental State Examination and a virtual Hidden Goal Task in egocentric, allocentric, and delayed recall subtests.

Results: In allocentric navigation, aMCI and comMCI performed significantly worse than HE and similarly to each other. Although aMCI performed significantly worse at egocentric navigation than HE, they performed significantly better than patients with comMCI.

Conclusions: Despite the growing burden of dementia and the prevalence of neuropsychiatric symptoms in the elderly population, comMCI remains under-studied. Since trials often assess “pure” aMCI, we may underestimate patients’ navigation and other deficits. This finding emphasizes the importance of taking account of the cognitive effects of psychiatric disorders in aMCI.     

Statistical properties of four effect-size measures for mediation models

This project examined the performance of classical and Bayesian estimators of four effect size measures for the indirect effect in a single-mediator model and a two-mediator model. Compared to the proportion and ratio mediation effect sizes, standardized mediation effect-size measures were relatively unbiased and efficient in the single-mediator model and the two-mediator model. Percentile and bias-corrected bootstrap interval estimates of ab/s _Y , and ab(s _X )/s _Y in the single-mediator model outperformed interval estimates of the proportion and ratio effect sizes in terms of power, Type I error rate, coverage, imbalance, and interval width. For the two-mediator model, standardized effect-size measures were superior to the proportion and ratio effect-size measures. Furthermore, it was found that Bayesian point and interval summaries of posterior distributions of standardized effect-size measures reduced excessive relative bias for certain parameter combinations. The standardized effect-size measures are the best effect-size measures for quantifying mediated effects.     

Pragma-Dialectical Reconstruction of Crisis Diary-Writing as a Communicative Activity Type

This paper concerns the character of argumentation in inner dialogue, i.e. dialogue that an individual keeps to herself in her own mind. The problem of inner dialogue research is the methodological difficulty connected with its externalization. In the text, the activity of crisis diary-writing is suggested as a way of naturally externalizing inner decision-making. By adopting a pragma-dialectic approach to argumentation, the text attempts to characterize crisis diary-writing as an argumentative activity type. The argumentative characterization of crisis diary-writing involves identifying the institutional point and implemented genre as well as distinguishing the empirical counterparts of the four stages of critical discussion. For illustration, the paper draws its examples from Anne Frank’s Diary. As a result of the characterization achieved in the paper, it is concluded that crisis diary-writing is a conventionalized deliberative activity type preconditioned by implicit norms governing the conduct of argumentation.

     

A Multiple‐Channel Model of Task‐Dependent Ambiguity Resolution in Sentence Comprehension

Traxler, Pickering, and Clifton (1998) found that ambiguous sentences are read faster than their unambiguous counterparts. This so‐called ambiguity advantage has presented a major challenge to classical theories of human sentence comprehension (parsing) because its most prominent explanation, in the form of the unrestricted race model (URM), assumes that parsing is non‐deterministic. Recently, Swets, Desmet, Clifton, and Ferreira (2008) have challenged the URM. They argue that readers strategically underspecify the representation of ambiguous sentences to save time, unless disambiguation is required by task demands. When disambiguation is required, however, readers assign sentences full structure—and Swets et al. provide experimental evidence to this end. On the basis of their findings, they argue against the URM and in favor of a model of task‐dependent sentence comprehension. We show through simulations that the Swets et al. data do not constitute evidence for task‐dependent parsing because they can be explained by the URM. However, we provide decisive evidence from a German self‐paced reading study consistent with Swets et al.'s general claim about task‐dependent parsing. Specifically, we show that under certain conditions, ambiguous sentences can be read more slowly than their unambiguous counterparts, suggesting that the parser may create several parses, when required. Finally, we present the first quantitative model of task‐driven disambiguation that subsumes the URM, and we show that it can explain both Swets et al.'s results and our findings.     

The Role of Metacognition in Self-Critical Rumination: An Investigation in Individuals Presenting with Low Self-Esteem

No research, to date, has directly investigated the role of metacognition in self-critical rumination and low self-esteem. The aims of this study are: to investigate the presence of metacognitive beliefs about self-critical rumination; the goal of self-critical rumination and its stop signal; and the degree of detachment from intrusive self-critical thoughts. Ten individuals reporting both a self-acknowledged tendency to judge themselves critically and having low self-esteem were assessed using metacognitive profiling, a semi-structured interview. All participants endorsed both positive and negative metacognitive beliefs about self-critical rumination. Positive metacognitive beliefs concerned the usefulness of self-critical rumination as a means of improving cognitive performance and enhancing motivation. Negative metacognitive beliefs concerned the uncontrollability of self-critical rumination and its negative impact on mood, motivation and perception of self-worth. The primary goal of engaging in self-critical rumination was to achieve a better or clearer understanding of a given trigger situation or to feel more motivated to resolve it. However, only four participants were able to identify when this goal had been achieved, which was if the trigger situation were not to occur again. Participants unanimously stated that they were either unable to detach from their self-critical thoughts or could do so some of the time with varying degrees of success. More often than not, though, self-critical thoughts were viewed as facts, would rarely be seen as distorted or biased, and could take hours or days to dissipate. These findings provide preliminary evidence that specific facets of metacognition play a role in the escalation and perseveration of self-critical rumination.     

Work Engagement of Dual-Working Couples: Dissimilarity and Its Relation to Both Partners’ Well-Being

Work engagement is a positive, fulfilling, work-related state of mind that is characterized by vigor, dedication, and absorption. Work engaged individuals not only function better at work, but also transfer these benefits to home - research has shown that work engagement crosses over between marital partners. In previous studies on crossover, this phenomenon was evidenced only by significant correlation between self-reports of partners’ work engagement, while measures of dissimilarity between partners were completely ignored. However, work engagement dissimilarity - with one partner being highly enthusiastic and immersed in his/her work and the other one lowly - could be related to some aspects of both partners’ well-being and might improve its prediction. Hence, the goal of this study was to examine work engagement dissimilarity within dual-earning couples. In addition to self-report measures, we collected partners’ ratings of work engagement and its subdimensions as well. The data collected on 178 dual-working Croatian couples showed significant correlation of overall work engagement, vigor, dedication and absorption between various pairs of self- and other-ratings measures (partners’ self-ratings; self-ratings and partner’s ratings; and partner’s self-ratings and his/her ratings of work engagement of the partner). Moreover, difference in self-ratings and ratings of partner’s work engagement showed negative correlation with life satisfaction of both partners, suggesting that work engagement dissimilarity has a potential to be related to some aspects of partners’ well-being.     

Testosterone,aggressiveness, and antisocial personality

Testosterone levels were examined in prisoners convicted of violent crimes (n = 13), in men previously convicted of violent crimes but currently not in prison (n = 15), in nonviolent alcoholics (n = 15), and in randomly selected control males (n = 16). Morning, afternoon, and evening testosterone levels were assessed after a minimum alcohol abstinence period of 24 hr. Violent and nonviolent men did not differ in plasma total testosterone level on any sampling occasion. In violent men, however, testosterone levels were significantly correlated with hostility, as measured by the Derogatis Symptom Check List. Most violent men were diagnosed with Antisocial Personality Disorder (ASP) [DSM‐III‐R; 301.70], and the unweighted ASP symptom count also correlated significantly with testosterone levels in these subjects. We suggest that individuals whose life histories involve numerous antisocial behaviors tend to have high testosterone levels even when interpersonal violence is excluded. This, however, does not eliminate the possibility that males who are characterized by high hostility may also have elevated testosterone levels. Violent predisposition and antisocial conduct beginning in early adolescence predict adult aggressive behaviors, which are augmented by power‐related alcohol expectancies and alcohol abuse. Aggr. Behav. 25:113–123, 1999. © 1999 Wiley‐Liss, Inc.