A Towel Less: Social Norms Enhance Pro-Environmental Behavior in Hotels

Previous research has shown that normative appeals to engage in environmentally friendly behavior were most effective when they were accompanied by a provincial norm (e.g., when norms matched individuals’ immediate situational circumstances). Analyzing hotel guests’ towel-use during their stay, the current study tests whether messages employing provincial norms were more effective in reducing towel-use than standard environmental messages. In line with previous findings, guests of two hotels used significantly fewer towels when provincial normative appeals—rather than standard environmental messages—were communicated. These findings corroborate to the body of research demonstrating the power of social norms on environmental behavior.     

Aktuelle Probleme der Krankenhausplanung in der Psychosomatischen Medizin und Psychotherapie

Ohne Zusammenfassung

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Language structure: psychological and social constraints

In this article we discuss the notion of a linguistic universal, and possible sources of such invariant properties of natural languages. In the first part, we explore the conceptual issues that arise. In the second part of the paper, we focus on the explanatory potential of horizontal evolution. We particularly focus on two case studies, concerning Zipf’s Law and universal properties of color terms, respectively. We show how computer simulations can be employed to study the large scale, emergent, consequences of psychologically and psychologically motivated assumptions about the working of horizontal language transmission.     

Trick or trait? The combined effects of employee impression management modesty and trait modesty on supervisor evaluations

Prior research on the benefits of modest self-presentation in organizational contexts has shown positive effects on several career-related outcomes, including employees' reputation, organizational support, and mentoring. However, little is known about the nature, mechanisms, and boundary conditions of this promising impression management tactic. Our study addresses this research gap by integrating two theoretical conceptions of modesty, i.e., impression management modesty (IM modesty) and trait modesty. We developed and tested an overarching theoretical model that postulates positive interactive effects of employees' IM modesty and trait modesty on supervisor ratings of employees' likeability, competence, and job performance. Data on 233 employee–supervisor dyads were analyzed using hierarchical regression and conditional process analyses. As expected, the effects of IM modesty were systematically moderated by employees' trait modesty: For employees with high trait modesty, IM modesty demonstrated significant positive effects on supervisor ratings of employee likeability and competence, which in turn were associated with higher job performance ratings. For employees with low trait modesty, however, using IM modesty was neither beneficial nor detrimental to supervisor evaluations. Implications for theory, practice, and avenues for future research are discussed.     

Mental representation of length and weight series and transitive inferences in young children

Forty-eight second graders (8 years of age) were trained on length or weight relationships between adjacent members of a five-term series of colored objects. Feedback was visual and of either minimal or strong salience. Differences in weight were assessed by either a balance scale or a spring scale. Results showed that more salient visual feedback reduced the learning effort for length but not for weight comparisons. After training children were tested on all possible object pairs. Children's comparisons of items by length were very accurate in contrast to their comparisons by weight. An explanation for these findings is suggested by the data from a group of 6-year-olds who were trained on two independent pairs of a four-term series. Test results showed that subjects spontaneously encoded absolute lengths but tended to ignore information about the absolute weight of objects. It is suggested that high test accuracy depends on stimulus material for which the absolute values of the relevant dimension are encoded. The implications for taking test performance as an indicator of “transitive reasoning” ability are discussed.     

Mixtures of conditional mean- and covariance-structure models

Models and parameters of finite mixtures of multivariate normal densities conditional on regressor variables are specified and estimated. We consider mixtures of multivariate normals where the expected value for each component depends on possibly nonnormal regressor variables. The expected values and covariance matrices of the mixture components are parameterized using conditional mean- and covariance-structures. We discuss the construction of the likelihood function, estimation of the mixture model with regressors using three different EM algorithms, estimation of the asymptotic covariance matrix of parameters and testing for the number of mixture components. In addition to simulation studies, data on food preferences are analyzed.The authors are grateful to Donald B. Rubin and Michael E. Sobel for critical reading of a first draft of this paper and to three anonymous reviewers ofPsychometrika for their helpful comments and suggestions. The research of the first and the third author was supported by a grant from the Deutsche Forschungsgemeinschaft.     

The Role of Reasoning and Pragmatics in the Modifier Effect

The modifier effect refers to the fact that the perceived likelihood of a property in a noun category is diminished if the noun is modified. For example, “Pigs live on farms” is rated as more likely than “Dirty pigs live on farms.” The modifier effect has been demonstrated in many studies, but the underlying cognitive mechanisms are still unclear. This paper reports two series of experiments that jointly point to the conclusion that the modifier effect is the result of a superposition of three cognitive mechanisms: (a) probabilistically softened default inheritance, (b) pragmatic implicatures due to Gricean relevance assumptions, and (c) inference based on world knowledge. We present evidence that the pragmatic effects operate largely on an unconscious level and that their influence can be reduced by changing the presentation format of the cognitive task.