The hydra-headed Mueller-Lyer effect: A theoretical puzzle

Three experiments were conducted to examine the effects of multiple fins on the magnitude of the Mueller-Lyer illusion. All studies showed that the multiple form of the elongation illusion was greater than the average of the components and that the multiple form of the shrinkage illusion was smaller than either of the components. The pattern of results failed to support either simple addition models or more complex averaging theories of illusions. A cross-attribute summation hypothesis and a filled space hypothesis were proposed as possible explanations for the results.     

MODIFICATION OF THE EXCESSIVE INAPPROPRIATE CLASSROOM BEHAVIOR OF TWO ELEMENTARY SCHOOL STUDENTS USING HOME-BASED CONSEQUENCES AND DAILY REPORT-CARD PROCEDURES1

Two experiments investigated home-based reinforcement contingencies to control excessive behavior in normal classrooms. Subjects were, respectively, a 12-yr-old fifth-grade boy and a 9-yr-old fourth-grade boy, each in a separate classroom and with a different teacher. Following baseline observations in which observers recorded several categories of student behavior and teacher-student interaction, separate conferences were held including parents of the two children, the principal, teachers, and experimenters. A daily report-card procedure was agreed on, stipulating a one-day suspension from school following three successive “undesirable” daily report cards as well as the supervision of home-based privileges and other reinforcers usually contingent on satisfactory daily reports. Measurements of daily rates of teacher attention indicated no important change in this variable throughout the various experimental conditions. The daily report procedure significantly reduced disruptive classroom behavior. In a second experiment, a teacher-operated timer cued her own time-sample observations. Reliability measures revealed that the teacher could accurately measure the child's behavior while she was teaching the class. The procedure was ultimately successfully expanded to the teacher's total contact hours each day.     

Interactive effects of social network centrality and social identification on stress

The present study aimed to integrate the social identity approach to health and well-being with social network analysis. Previous research on the effects of social network centrality on stress has yielded mixed results. Building on the social identity approach, we argued that these mixed results can be explained, in part, by taking into account the degree to which individuals identify with the social network. We hence hypothesized that the effects of social network centrality on stress are moderated by social identification. Using a full roster method, we assessed the social network of first-year psychology students right after the start of their study programme and three months later. The effects of network centrality (betweenness, closeness, eigenvector centrality) and social identification on stress were examined using structural equation models. As predicted, our results revealed a significant interaction between network centrality and social identification on stress: For weakly or moderately identified students, network centrality was positively related to stress. By contrast, for strongly identified students, network centrality was unrelated to stress. In conclusion, our results point to the perils of being well-connected yet not feeling like one belongs to a group.     

Social preference in rats

Rats were given repeated choices between social and nonsocial outcomes, and between familiar and unfamiliar social outcomes. Lever presses on either of 2 levers in the middle chamber of a 3-chamber apparatus opened a door adjacent to the lever, permitting 45-s access to social interaction with the rat in the chosen side chamber. In Experiment 1, rats preferred (a) social over nonsocial options, choosing their cagemate rat over an empty chamber, and (b) an unfamiliar over a familiar rat, choosing a non-cagemate over their cagemate. These findings were replicated in Experiment 2 with 2 different non-cagemate rats. Rats preferred both non-cagemate rats to a similar degree when pitted against their cagemate, but were indifferent when the 2 non-cagemates were pitted against each other. Similar preference for social over nonsocial and non-cagemate over cagemate was seen in Experiment 3, with new non-cagemate rats introduced after every third session. Response rates (for both cagemate and non-cagemate rats) were elevated under conditions of nonsocial (isolated) housing compared to conditions of social (paired) housing, demonstrating a social deprivation effect. Together, the experiments contribute to an experimental analysis of social preference within a social reinforcement framework, drawing on methods with proven efficacy in the analysis of reinforcement more generally.     

Skepticism and the principle of sufficient reason

Philosophical Studies - The Principle of Sufficient Reason must be justified dialectically: by showing the disastrous consequences of denying it. We formulate a version of the Principle that is...     

Actions in Slow Motion: Theoretical and Methodological Reflections on Temporality in Actions and Intersubjective Understanding

This article examines the connection between actions, temporality, and media-based observation. Slow motion technology is currently being used especially in sports to examine and evaluate athletes’ actions more precisely in order to identify potential infringements of rules. Starting with a phenomenological perspective, this article engages in a critical assessment of the degree to which the intentions underlying athletes’ actions become clearer if their actions are slowed down using slow motion. It transpires that a more in-depth understanding is not possible because the process of time-stretching using media technology tends to obscure intersubjective understanding. Nevertheless, the use of different playback speeds does increase observers’ sensitivity to the temporality of action and observation. This is particularly the case when greater emphasis is placed on the body and its role in the formation and carrying out of intentions. With the phenomenological view and in special consideration of the body and the subjective intentionality, the paper contributes to a discussion about the connection of time and (inter-)action already led in ethnomethodology and conversation analysis. These findings mark a contribution to empirical social research as well, which is increasingly using video material in action analysis and should take slow motion as a possible augmented but also manipulated access to actions into account adequately. To this end, this article suggests a method for identifying the merits and demerits of using slow motion to analyse actions, and discusses the methodological implications of temporality in observation.

     

Rain,Rain Go Away! A Diary Study on Morning Weather and Affective Well-Being at Work

Weather determines a number of affective experiences in everyday life. Although affective events theory positions environmental features such as the weather as important in determining affective well-being also at work, research in this regard has mainly focused on predictors within the person or work context. Addressing this gap, we studied how daily morning weather relates to day-specific affective well-being at work. Specifically, we examined vigor and job satisfaction as positive well-being states, and negative affect and burnout as negative well-being states. Additionally, we examined individual weather sensitivity and positive/negative affectivity as person-level moderators of the daily weather–well-being relationship. Using data gathered in a diary study with 115 employees reporting on 457 workdays, we found morning weather to be related to state vigor and job satisfaction, but not to negative affect and burnout. Positive affectivity moderated the relationships between morning weather and job satisfaction as well as burnout. Weather sensitivity moderated the relationship between morning weather and vigor, while negative affectivity did not moderate any relationship between morning weather and well-being at work. Our results contribute to the understanding of affective well-being at work by pointing at the role environmental factors such as weather conditions can play.     

Entrepreneurial Passion: A Review,Synthesis, and Agenda for Future Research

The present study undertakes a comprehensive and critical review of the body of empirical work on entrepreneurial passion. In particular, we document how the “first generation” of research on entrepreneurial passion and work passion in entrepreneurs has gained growing attention in various sub-fields of entrepreneurship research including entrepreneurial management, psychology, and finance. We provide an overview over theories used, definitions and measurements adopted, research methods utilized (e.g., qualitative vs. quantitative, survey-based vs. experimental/intervention), the thematic focus of studies, and unit of investigation (e.g., individual vs. team). We not only flag the problems of inconsistencies and limitations with respect to theory use, the making of causal inferences, and the conceptualization and measurement of entrepreneurial passion in existing studies (e.g., jingle fallacies), but also review the antecedents and outcomes of entrepreneurial passion identified in prior work and work where it had been examined as a moderator. Following this, we offer a research agenda with concrete suggestions to act as a foundation for the “second generation” of entrepreneurial passion research that proactively addresses the issues and gaps identified in our review. Finally, we also highlight how insights from the entrepreneurial passion literature can inform scholarship on passion more broadly.     

Freedom as Non-domination,Robustness, and Distant Threats

Ethical Theory and Moral Practice - It is a core feature of the conception of freedom as non-domination that freedom requires the absence of exposure to arbitrary power across a range of relevant...