Estimation of Effect Heterogeneity in Rare Events Meta-Analysis

Psychometrika - The paper outlines several approaches for dealing with meta-analyses of count outcome data. These counts are the accumulation of occurred events, and these events might be rare, so...     

Leading in times of crisis: How perceived COVID-19-related work intensification links to daily e-mail demands and leader outcomes

The COVID-19 crisis brought numerous challenges to work life. One of the most notable may be the acceleration of digital transformation, accompanied by an intensification of e-mail usage and related demands such as high e-mail workload. While research quickly started to examine the implications of these changes for employees, another important group of stakeholders has been overlooked: leaders. We focus on leaders during the COVID-19 crisis and examine how COVID-19-related work intensification links to leaders' e-mail overload appraisal and finally exhaustion and transformational leadership, a leader behaviour especially needed in times of crisis. In a 5-day diary study in September 2020, 84 leaders responded to daily surveys on 343 days. Results of multilevel analysis showed that perceived COVID-19-related work intensification was positively linked to worktime spent dealing with e-mail and appraised e-mail overload. E-mail overload appraisal was positively related to leaders' exhaustion, but unrelated to their transformational behaviour. Day-specific time spent dealing with e-mail, however, was negatively related to transformational leadership. E-mail overload appraisal mediated the relationship between COVID-19-related work intensification and exhaustion. Turning the focus on leaders during the COVID-19 crisis, our study has important implications for the design of work of leaders in times of crisis and beyond.     

Social support from fellow group members triggers additional effort in groups

This research demonstrates social support from fellow group members as unique trigger of additional effort and performance in groups. Support‐induced effort gains are shown both compared with groups without social support and individual work. Study 1 examined existing beliefs about motivating group work among employees with professional group work experience (n = 130). The results revealed social support as one of the most frequently reported sources of group‐induced effort gains. Study 2 explored self‐reported effort intentions in group training scenarios among athletes (n = 94). Finally, Study 3 examined performance as a manifest indicator of effort in an experimental persistence task among students (n = 88). The results of Study 2 and Study 3 showed significant gains due to social support in both self‐reported effort and manifest performance, respectively. Together, the results demonstrate that receiving social support from fellow group members leads to higher effort in groups at the level of existing beliefs about motivating group work, at the level of effort intentions, and at the level of manifest performance behavior. The observed findings cannot be explained by established sources of motivation gains in groups such as social comparison or social indispensability. Copyright © 2014 John Wiley & Sons, Ltd.     

Acquired affective associations induce emotion effects in word recognition: An ERP study

The present study examined how contextual learning and in particular emotionality conditioning impacts the neural processing of words, as possible key factors for the acquisition of words’ emotional connotation. 21 participants learned on five consecutive days associations between meaningless pseudowords and unpleasant or neutral pictures using an evaluative conditioning paradigm. Subsequently, event-related potentials were recorded while participants implicitly processed the learned emotional relevance in a lexical decision paradigm. Emotional and neutral words were presented together with the conditioned pseudowords and a set of new pseudowords. Conditioned and new pseudowords differed in the late positive complex. Emotionally and neutrally conditioned stimuli differed in an early time window (80–120 ms) and in the P300. These results replicate ERP effects known from emotion word recognition and indicate that contextual learning and in particular evaluative conditioning is suitable to establish emotional associations in words, and to explain early ERP effects in emotion word recognition.     

Mental contrasting with implementation intentions enhances self-regulation of goal pursuit in schoolchildren at risk for ADHD

Self-regulation is an important prerequisite for successful academic achievement, particularly for children who are at risk for Attention Deficit Hyperactivity Disorder (ADHD). We taught Mental Contrasting with Implementation Intentions (MCII), a technique that is known to facilitate the self-regulation of goal pursuit, to schoolchildren (sixth- and seventh-graders) both at risk and not at risk for ADHD. Parents rated their children’s level of self-regulation 2 weeks after the intervention. Children at risk and not at risk benefited from MCII more than from a learning style intervention only and the benefits of MCII were particularly strong for children at risk for ADHD. The results have implications with respect to supporting children’s self-regulation in their everyday school lives.     

Comparing the Effectiveness of Two Communication Formats on Visitors’ Understanding of Nanotechnology

ABSTRACT

The authors investigated the results of the Europe-wide initiative NanoToTouch, which aims to create innovative environments in science museums to encourage public understanding of nanotechnology and nanotechnological research. The concepts of civic scientific literacy and expert–layperson communication formed the theoretical framework of the study. Two kinds of communication formats, which varied in the degree to which presentations were individualized for visitors, were established and investigated in five museums and science centers in four countries. The findings from 522 visitors indicate (a) a positive response from visitors regarding both formats with some differences between them; (b) an increase in visitors’ self-perceived level of knowledge, which was considerably higher for nanotechnological content than for nanotechnological research; and (c) a predominance of situational aspects, compared to personal variables, influencing visitors’ learning. Results are discussed in terms of an effective implementation of these communication formats in museums.     

Space-based and object-based capacity limitations in visual search

Space-based accounts of visual attention assume that we select a limited spatial region independent of the number of objects it contains. In contrast, object-based accounts suggest that we select objects independent of their location. We investigated the boundary conditions on the selection modes of attention in a series of tachistoscopic visual search tasks, where the nature of capacity limitations on search was examined. Observers had to search for a horizontally oriented target ellipse among differently oriented distractor ellipses. Across four experiments, we orthogonally manipulated target-distractor (TD) similarity and distractor-distractor (DD) similarity. Each experiment consisted of a two-way design: Firstly, with a central cue, we indicated the spatial extent of the relevant search area. Secondly, we varied the number and spatial proximity of items in the display. Performance could be accounted for in terms of capacity limited object-based attention, assuming also that the spatial proximity of items enhances performance when there is high DD-similarity (and grouping). In addition, the cueing effect interacted with spatial proximity when DD-similarity was high, suggesting that grouping was influenced by attention. We propose that any capacity limits on visual search are due to object-based attention, and that the formation of perceptual objects and object groups is also subject to attentional modulation.     

Limited transfer of subliminal response priming to novel stimulus orientations and identities

Recently, priming effects of unconscious stimuli that were never presented as targets have been taken as evidence for the processing of the stimuli's semantic categories. The present study explored the necessary conditions for a transfer of priming to novel primes. Stimuli were digits and letters which were presented in various viewer-related orientations (upright, horizontal, inverted). The transfer of priming to novel stimulus orientations and identities was remarkably limited: in Experiment 1, in which all conscious targets stood upright, no transfer to unconscious primes in a non-target orientation was found. Experiment 2, in which primes were presented without masks, ruled out the possibility that primes were presented too short to allow congruency effects. In Experiments 3 and 4, in which all targets were presented upside down, priming transferred to upright stimuli with target identities but neither to horizontal stimuli nor to stimuli with novel identities. We suggest that whether a transfer of priming to unpracticed stimuli occurs or not depends on observers' expectations of specific stimulus exemplars.     

Health and human services for persons who stutter and education of logopedists in East-European countries

The International Association of Logopedics and Phoniatrics (IALP) assessed the therapy status of fluency disorders, service opportunities, and education of logopedists (speech-language pathologists) with a mail survey in Eastern Europe. Information was collected on the following aspects: incidence, prevalence, availability of information, non-therapeutic support for persons who stutter (PWS), providers of diagnostics and therapy, cooperating professionals, therapy approaches, forms, goals, financing, early detection and prevention, training of professionals, specialization in stuttering therapy, needs for improving the situation of PWS, and problems which hinder better care. Stuttering therapy for children is available in many countries and is frequently provided by the educational system. Therapy for adults is provided best by the health services but is not satisfactorily available everywhere. Modern therapeutic approaches coexist with obsolete ones. Lack of resources, awareness, entitlement, and assessment of therapy effectiveness are pervasive problems.

Educational objectives: Readers will be able to describe and evaluate: (1) the therapy status of fluency disorders and service opportunities in various East-European countries; (2) the training of logopedists (speech-language pathologists); (3) specialization in stuttering therapy; and (4) the organizational services for PWS within the health and human service systems.     

The integration of familiarity and recollection information in short-term recognition: modeling speed-accuracy trade-off functions

Dual process models postulate familiarity and recollection as the basis of the recognition process. We investigated the time-course of integration of the two information sources to one recognition judgment in a working memory task. We tested 24 subjects with a response signal variant of the modified Sternberg recognition task (Oberauer, 2001) to isolate the time course of three different probe types indicating different combinations of familiarity and source information. We compared two mathematical models implementing different ways of integrating familiarity and recollection. Within each model, we tested three assumptions about the nature of the familiarity signal, with familiarity having (a) only positive values, indicating similarity of the probe with the memory list, (b) only negative values, indicating novelty, or (c) both positive and negative values. Both models provided good fits to the data. A model combining the outputs of both processes additively (Integration Model) gave an overall better fit to the data than a model based on a continuous familiarity signal and a probabilistic all-or-none recollection process (Dominance Model).