Bayes factor design analysis: Planning for compelling evidence

A sizeable literature exists on the use of frequentist power analysis in the null-hypothesis significance testing (NHST) paradigm to facilitate the design of informative experiments. In contrast, there is almost no literature that discusses the design of experiments when Bayes factors (BFs) are used as a measure of evidence. Here we explore Bayes Factor Design Analysis (BFDA) as a useful tool to design studies for maximum efficiency and informativeness. We elaborate on three possible BF designs, (a) a fixed-n design, (b) an open-ended Sequential Bayes Factor (SBF) design, where researchers can test after each participant and can stop data collection whenever there is strong evidence for either \(\mathcal {H}_{1}\) or \(\mathcal {H}_{0}\), and (c) a modified SBF design that defines a maximal sample size where data collection is stopped regardless of the current state of evidence. We demonstrate how the properties of each design (i.e., expected strength of evidence, expected sample size, expected probability of misleading evidence, expected probability of weak evidence) can be evaluated using Monte Carlo simulations and equip researchers with the necessary information to compute their own Bayesian design analyses.     

当代中学生与其父母价值观的异同

本研究以一个完整家庭(包括父亲、母亲、子女)为单位,基于施瓦茨的价值观理论,对上海及其周边中小城市、农村的107个14-17周岁的在校中学生家庭进行了价值观调查。在考察子女与其父母价值观差异的同时,运用多元回归分析探索当代中学生与父母价值观的相似性。结果表明,父母双方与子女价值观存在较大差异,其中母亲与子女的价值观差异更大;但子女与父母在集体主义价值观维度上表现出显著的相似性。     

A new look at sensory attenuation. Action-effect anticipation affects sensitivity, not response bias

The systematic association of an action that a person performs with its sensory effects is thought to attenuate that person's perception of the effect of the action. However, whether learned sensorimotor contingencies truly affect perception, rather than just inducing a response bias, has yet to be determined. The experiment presented in this article comprised two parts: an action-effect association phase and a test phase, during which the actions' perceptual effects were tested. During the association phase, specific actions (left-key and right-key presses) were associated with specific visual effects (tilted Gabor patches). In the test phase, participants' left-key presses and right-key presses triggered the onset of a low-contrast tilted Gabor patch in 50% of trials (no stimulus was presented on the remaining 50% of trials). Participants were required to report the presence or absence of this tilted Gabor patch. Our results showed that participants' sensitivity (d') to the Gabor patches was reduced by 10% when the patches were triggered by the action they had previously been associated with. This finding indicates that a person's action does not induce a response bias (c), but changes the perception (d') of the learned action effect.     

Krankheitsbelastung bei chronisch entzündlichen Darmerkrankungen

Background

Psychosocial distress is considerable in inflammatory bowel disease (IBD). The aim of this study was to assess the association of illness perceptions with disease-specific distress in patients with IBD in the context of various medical and psychological parameters.

Method

A total of 62 patients suffering from IBD were examined for illness perceptions using the illness perception questionnaire revised (IPQ-R), medical parameters and affective parameters using the hospital anxiety and depression scale (HADS) in a cross-sectional study. Associations with disease-specific distress were assessed.

Results

In multiple regression analyses illness perceptions and also physical well-being were identified as significant predictors of disease-specific distress and showed significant effects on the explanation for the amount of variance (R²=0.70).

Conclusion

Even in the context of various medical and psychological parameters illness perceptions showed significant associations with disease-specific distress in patients with IBD.     

Applicant Reactions in Selection: Comprehensive meta‐analysis into reaction generalization versus situational specificity

This paper reports a comprehensive quantitative summary into applicant reactions to popular methods of employee selection. A detailed search of published and unpublished studies resulted in a final sample (k) of 38 independent samples covering 10 popular candidate assessment methods. Applicant reactions primary studies included samples from 17 countries internationally. Counter to previous suggestions for the situational specificity of applicant reactions, findings showed considerable similarity supporting the reaction generalizability hypothesis. Reaction favorability was structurally similar across countries and revealed a three‐tier clustering of overall favorability perceptions –most preferred (work samples, interviews), favorably evaluated (resumes, cognitive tests, references, biodata, personality inventories), and least preferred (honesty tests, personal contacts, graphology). Some differences in applicant reactions to dimension‐specific perceptions were found, however. Further analyses revealed strong positive correlations between favorability ratings and their validity and international usage. Implications for future research and ramifications for practice are considered in conclusion.     

Reasons for Being Selective When Choosing Personnel Selection Procedures

The scientist–practitioner gap in personnel selection is large. Thus, it is important to gain a better understanding of the reasons that make organizations use or not use certain selection procedures. Based on institutional theory, we predicted that six variables should determine the use of selection procedures: the procedures' diffusion in the field, legal problems associated with the procedures, applicant reactions to the procedures, their usefulness for organizational self‐promotion, their predictive validity, and the costs involved. To test these predictions, 506 HR professionals from the German‐speaking part of Switzerland filled out an online survey on the selection procedures used in their organizations. Respondents also evaluated five procedures (semi‐structured interviews, ability tests, personality tests, assessment centers, and graphology) on the six predictor variables. Multilevel logistic regression was used to analyze the data. The results revealed that the highest odd ratios belonged to the factors applicant reactions, costs, and diffusion. Lower (but significant) odds ratios belonged to the factors predictive validity, organizational self‐promotion, and perceived legality.     

Minimizing motor mimicry by myself: Self-focus enhances online action-control mechanisms during motor contagion

Ideomotor theory of human action control proposes that activation of a motor representation can occur either through internally-intended or externally-perceived actions. Critically, sometimes these alternatives of eliciting a motor response may be conflicting, for example, when intending one action and perceiving another, necessitating the recruitment of enhanced action-control to avoid motor mimicry. Based on previous neuroimaging evidence, suggesting that reduced mimicry is associated with self-related processing, we aimed to experimentally enhance these action-control mechanisms during motor contagion by inducing self-focus. In two within-subjects experiments, participants had to enforce their action intention against an external motor contagion tendency under heightened and normal self-focus. During high self-focus participants showed reduced motor mimicry, induced either by mirror self-observation or self-referential judgments. This indicates that a self-focus provoking situation can enhance online action-control mechanisms, needed to resist unintentional motor contagion tendencies and thereby enables a modulation of automatic mirroring responses.     

Contemporaneous Statistics for Estimation in Stochastic Actor-Oriented Co-evolution Models

Psychometrika - Stochastic actor-oriented models (SAOMs) can be used to analyse dynamic network data, collected by observing a network and a behaviour in a panel design. The parameters of SAOMs are...     

Lucky joint action

In this paper, I argue that joint action permits a certain degree of luck. The cases I have in mind exhibit the following structure: each participant believes that the intended ends of each robustly support the joint action. This belief turns out to be false. Due to lucky circumstances, the discordance in intention never becomes common knowledge. However, common knowledge of the relevant intentions would have undermined the joint action altogether. The analysis of such cases shows the extent to which common knowledge of the participants’ intentions can be harmful to joint action. This extends a recent line of research that has questioned the necessity of common knowledge in joint action.     

Ambulante Psychotherapie bei Kindern und Jugendlichen

This paper presents the results of a study of the state of outpatient psychotherapy of children and juveniles in Germany after the PTG came into force. A total of 180 psychotherapists were questioned on certain issues. One result was that patients have to wait 4.5 months for psychotherapy and that every second patient asking for a diagnostic interview and possible treatment was refused.Of those who were given a diagnostic interview 43% were not taken into treatment, although disturbances were diagnosed such as addiction, bodily disabilities with psychic complications, enuresis/encopresis, anorexia nervosa, psychosomatic illnesses, developmental arrests which would normally demand psychotherapeutic treatment. Furthermore only 25% of those children and juveniles who Löcherbach et al. (2000, S.59 f.) considered needing and wanting psychotherapeutic treatment were actually in a G IV psychotherapy.Apart from this the possibility of getting psychotherapy as well as the kind of psychotherapy proved to be dependent on the kind of medical insurance. Differing payments by the insurance companies caused longer waiting times for patients and determined the choice of psychotherapy by the psychotherapists.