Die Low-Cost-Hypothese

The Low-Cost-Hypothesis (LCH) postulates that the effect of attitudes on behavior varies with the costs at stake in the situation. The effect is deemed to be higher in low-cost-situations, compared to high-cost-situations. We argue that a closer look at the literature reveals two distinct versions of the LCH, which have not been disentangled so far. We reconstruct both versions ?C the ??simple?? and the ??specific?? version of the LCH ?C and discuss their theoretical foundations and empirical implications. The ??simple?? version can be derived from a simple expected utility model. In this model, attitudes and (tangible) behavioral costs exert independent effects on the net utility of the action alternatives. A conditional effect of the attitudes that depends on the behavioral costs only exists with respect to the probability of choosing an action alternative. However, this dependence of marginal effects on the actor??s initial level of utility or probability holds for any independent variable or utility argument. A second, ??specific?? version of the LCH postulates a variable-specific interaction effect between attitudes and costs. We point to the problems of previous approaches to deriving such a specific hypothesis and identify dual-process-theories as an alternative theoretical foundation that allows understanding the limited scope conditions of the specific LCH. The article carries important conclusions for empirical applications and tests of the LCH in diverse fields of sociological research and, more generally, for the decision-theoretic analysis of social action.     

When near means related: evidence from three web survey experiments on inter-item correlations in grid questions

In this article, we present the results of three question design experiments on inter-item correlations, which tested a grid design against a single-item design. The first and second experiments examined the inter-item correlations of a set with five and seven items, respectively, and the third experiment examined the impact of the question design on inter-item correlations of follow-up questions. We found that the inter-item correlations in grid designs were higher for both the set of five and seven items than for questions in a single-item design. Additionally, the inter-item correlations of the set of follow-up questions were higher if the preceding set of questions was presented in a grid. According to the findings of the present research, respondents seem to apply the interpretative near means related heuristic when answering grid questions, and also when answering follow-up questions preceeded by grid questions.     

Utilization of counseling and supportive services by female victims of domestic abuse

Increasing attention to the high prevalence of domestic violence (DV) and its impact on women's physical and mental health has resulted in expanded services for abused women. Abused women appear to underutilize the formal counseling services available in many communities, however, and further research is needed to identify factors related to service utilization. In the present study, 1,746 women assaulted by a male intimate partner were identified from a larger pool of women interviewed by Pretrial Services following the arrest of their spouse/partner on domestic abuse charges. The women were selected for the current study if they reported prior physical assaults perpetrated by the same spouse/partner listed in the instant offense. In addition to describing previous physical assaults and psychological abuse by their current spouse/partner, women were also asked whether they had ever sought "formal counseling/supportive services" to address the abuse. Consistent with the prior literature, only a minority of the victims reported prior use of these services (14.9%). Additional analyses indicated that the likelihood of having accessed services varied as a function of victim demographic factors (race, relationship to the offender, income), characteristics of the prior DV (prior injury by partner, forced sexual activity, prior psychological abuse), and whether the victim's children witnessed the fighting. Limitations of the study and implications for service providers and the courts are discussed.     

Signed Roman domination in graphs

In this paper we continue the study of Roman dominating functions in graphs. A signed Roman dominating function (SRDF) on a graph G=(V,E) is a function f:V→{?1,1,2} satisfying the conditions that (i) the sum of its function values over any closed neighborhood is at least one and (ii) for every vertex u for which f(u)=?1 is adjacent to at least one vertex v for which f(v)=2. The weight of a SRDF is the sum of its function values over all vertices. The signed Roman domination number of G is the minimum weight of a SRDF in G. We present various lower and upper bounds on the signed Roman domination number of a graph. Let G be a graph of order n and size m with no isolated vertex. We show that $\gamma _{\mathrm{sR}}(G) \ge\frac{3}{\sqrt{2}} \sqrt{n} - n$ and that γ _sR(G)≥(3n?4m)/2. In both cases, we characterize the graphs achieving equality in these bounds. If G is a bipartite graph of order n, then we show that $\gamma_{\mathrm{sR}}(G) \ge3\sqrt{n+1} - n - 3$ , and we characterize the extremal graphs.     

Conditioning of Marked Point Processes within a Bayesian Framework

Shale units with low permeability create barriers to fluid flow in a sandstone reservoir. A spatial stochastic model for the location of shale units in a reservoir is defined. The model is based on a marked point process formulation, where the marks are parameterized by random functions for the shape of a shale unit. This extends the traditional formulation in the sense that conditioning on the actual observations of the shale units is allowed in an arbitrary number of wells penetrating the reservoir. The marked point process for the shale units includes spatial interaction of units and allows a random number of units to be present. The model is defined in a Bayesian setting with prior pdfs assigned to size–shape parameters of shale units. The observations of shales in wells are associated with a likelihood function. The posterior pdf of the marked point process can only partially be developed analytically; the final solution must be determined by sampling using the Metropolis–Hastings algorithm. An example is presented, demonstrating the consequences of increasing the number of wells in which observations are made.     

Die Umstellung auf ökologische Landwirtschaft

Utilizing data from a recent postal survey of farmers in western Germany (n=657), this paper studies the influence of environmental concern on environmental behaviour in a rational choice context. The analyses reveal both an indirect and a direct effect of environmental concern. First, environmental concern increases the preference for environmentally friendly consequences leading to a higher expected utility of environmentally friendly alternatives. Second, even controlling for the influence of utility expectations, environmental concern increases the probability of environmentally friendly behaviour, indicating a direct influence over and above the indirect effect. The direct effect of environmental concern, however, can be observed only if environmentally friendly action alternatives are associated with higher behavioural cost than environmentally degrading alternatives. Apart from that, the effect of environmental attitudes is not moderated by utility considerations and the cost structure of the respective alternatives. In sum, these results do not lend support to the low cost hypothesis.     

Prosecution of women arrested for intimate partner abuse

Increasing arrests of women for domestic violence (DV) in the wake of mandatory arrest laws have generated significant concern among victim advocates, researchers, and practitioners. It is commonly believed that many, if not most, of the women arrested are victims who were acting in self-defense. Understanding how these cases are handled by prosecutors and judges is important if we wish to minimize the negative consequences of these errant arrests. The present study examines factors prosecutors in a large southern city considered when accepting or rejecting DV cases involving female defendants. The results indicate that almost one half (47%) of the cases involving women arrested for DV against a heterosexual intimate partner were rejected by prosecutors; another 16% were dismissed by a judge. Legal factors like a defendant's prior criminal arrests, use of a weapon, victim injury, and, most important, the type of arrest (i.e., dual vs. single arrest) all affected prosecutors' decisions to take these cases. Female defendants arrested for offending against a male intimate partner were treated more leniently than male defendants and women arrested for domestic offenses involving other types of relationships (i.e., familial, homosexual). The results highlight the need for a further study of officers' arrest decisions in cases involving heterosexual intimate partners.     

The impact of respondent attentiveness on reliability and validity

This study aims to assess whether respondent inattentiveness causes systematic and unsystematic measurement error that influences survey data quality. To determine the impact of (in)attentiveness on the reliability and validity of target measures, we compared respondents from a German online survey (N = 5205) who had passed two attention checks with those who had failed. Our results show that inattentiveness induces both random and systematic measurement error, which impacts estimates of the reliability and validity of multi-item scales. In addition, we conducted a sensitivity analysis, which revealed that the impact of inattentiveness on analyses can be substantial.