Rabbits in the fields: Temporal, spatial, and behavioral explanations of dryland crop failure in the Great Basin, 1912–1920

Records of dryland homesteaders in three parts of the Great Basin between 1912 and 1920 show that crop failures were common occurrences, and that failure was more often attributed to jackrabbits than to drought. These records demonstrate that most failures caused by rabbits conformed to well-defined temporal and spatial patterns, but they also make it clear that some losses can be explained only by specific actions taken by the farmers, their families, and neighbors.     

Assessing the Effect of Model Misspecifications on Parameter Estimates in Structural Equation Models

Model misspecifications may have a systematic effect on parameters, causing biases in their estimates. In the application of structural equation models, every interesting model is fallible. When simultaneously evaluating a model, it is of interest to study whether all parameters are affected by a misspecification. This paper provides three procedures for evaluating such an effect: (1) analyzing the path, (2) using a functional relationship, and (3) using a significance test. Analyzing the path is illustrated through a confirmatory factor model. This method is ad hoc but intuitive. A more rigorous approach is built upon the concept of orthogonality of two sets of parameters. When parameter a is orthogonal to parameter b, omitting parameter b will not affect the estimation of parameter a. The functional relationship of two sets of parameters is used to check their orthogonality. The distribution of the difference between estimates based on different models is obtained, which provides a Hausman–like way to check significant parameter differences that are due to biases. Examples illustrate that these procedures can provide valuable information on identifying parameter estimates that are systematically affected by a model misspecification.     

Hate Speech and Constitutional Protection: Priming Values of Equality and Freedom

Freedom of speech and equality are two basic values in American culture that cause a value conflict with regard to hate speech. This study examined the effects of priming of values of freedom of speech and equal protection (equality) on perceptions of and attitudes toward hate speech and value prioritization. Data were collected from 159 college students. Priming of freedom of speech directed participants' attitudes and values toward advocating freedom of speech, whereas priming for equal protection directed attitudes and values toward the harm of hate speech. Participants primed for free speech viewed hate speech (introduced via scenarios) as less harmful and the speaker as less accountable than those primed for the harm of hate speech and a control group.     

On the sociology of women's unemployment,its neglect and significance

Although there is an extensive and varied literature on the nature and consequences of unemployment very little has been written about the experiences of jobless women. This is unfortunate since there are good sociological reasons why the reactions to job loss among women may be different from those of men. Empirical data tend to support this expectation although more research is needed and called for. Sociological studies of unemployed women could contribute to the development of theories about wage-work, family life and domestic labour. Women's unemployment also has a broader significance in that it bears directly upon theories of social stratification and social order that are central to sociological study as a whole.     

Postnatal Effects of Prenatal Insult

Exogenous agents may perturb development during the embryonic period and adversely affect the formation of organs. However, adverse effects on development are not limited to the embryonic period nor are the manifestations restricted solely to outright gross structural malformation, but may instead be expressed as a decrement or abberration of postnatal function. Susceptibility to altered development may extend well into the postnatal period. Studies of functional parameters in several organ systems have demonstrated the broad-based susceptibility, subtlety of expression and potential of long-lasting effects of altered development assessed by physiologic assays. Adverse effects on functional development, whether in the CNS, reproductive, gastrointestinal, genitourinary, respiratory, or immune systems, etc., merit continuing investigation. From the viewpoint of risk estimation and hazard detection, evaluations of postnatal functional parameters may be relevant for several reasons. First, such parameters may serve as low-dose triggers. Second, they may be useful as a focal point for epidemiological studies. Finally, a more thorough understanding of the degree and magnitude of such postnatal functional deficits is needed since an adverse maternal effect may be transient, considered acceptable, or unperceived, but the effect on the conceptus may be permanent and severe. The immune and respiratory systems are discussed as two examples of how subtle and protean adverse effects on functional development may be.     

Physical and mental health outcomes of women in nonviolent, unilaterally violent, and mutually violent relationships

Despite equivocal findings on whether men or women are more violent, the negative impact of violence is greatest for women. To determine how gender asymmetry in perpetration affects women's health status, we conducted a study in two phases with 835 African American, Euro-American, and Mexican American low-income women in Project HOW: Health Outcomes of Women. In Phase 1, we used severity and frequency of women's and male partners' violence to create six groups: nonviolent (NV), uni-directional male (UM) perpetrator, uni-directional female (UF) perpetrator and, when both partners were violent, symmetrical (SYM), male primary perpetrator (MPP), and female primary perpetrator (FPP). The MPP group sustained the most threats, violence, sexual aggression, and psychological abuse. They also reported the most fear. Injury was highest in the MPP and FPP groups. In Phase 2, we examined group differences in women's health status over time for 535 participants, who completed five annual interviews. Surprisingly, women's health in the MPP and FPP violence groups was similar and generally worse than if violence was uni-directional.     

Where college students look for vaping information and what information they believe

Abstract

Objective: This convergent mixed methods study examined how information sources influence college students’ beliefs and knowledge about vaping. Participants: College students either completed a survey (n?=?522; January–April, 2016) or were interviewed (n?=?33; 2015–2016). Methods: College students completed an online survey asking ‘where’ students had heard about e-cigarette and ‘what’ they had heard. Responses were quantified and a chi-square analysis was conducted. Additional college student e-cigarette users were interviewed about the credibility of information sources. Thematic analysis was conducted with the coded interviews. Results: There was a significant relationship between information sources for e-cigarettes (social sources, media, advertising, education/research) and the messages they recalled. Friends who vaped and e-cigarette users were the most credible information sources. Confirmation bias and scientific impotence bias characterized assessment of e-cigarette information. Conclusions: Health education specialists working on college campuses should provide accurate information via communication channels most unitized by college students.