Pesticide exposure and sprayer's task goals: comparison between vineyards and greenhouses

Plant protection products are used in agriculture to improve yields, but this use can cause contamination of the environment and is also likely to have adverse short and long term effects on agricultural workers. The field study took place in greenhouses and vineyards where operators are involved in high levels of pesticide spraying. The objective of this intervention was to identify factors explaining the influence of task factors on the exposure of greenhouse growers and vineyard workers. Thirteen operators were selected for detailed observations during one session of spraying. Video recordings provide counts of physical contacts between the operator and all the surrounding surfaces during the spraying operation. Both in vineyards and in greenhouses, physical and temporal constraints are the predominant factors in establishing a specific spraying procedure. Every action taken by the operator is a result of a compromise between safety, task performance and quality.     

Beyond resistance: exploring health managers' propensity for participatory evaluation in a developing country

The evaluation of interventions is becoming increasing common and now often seeks to involve managers in the process. Such practical participatory evaluation (PPE) aims to increase the use of evaluation results through the participation of stakeholders. This study focuses on the propensity of health managers for PPE, as measured through the components of learning, working in groups, use of judgment and use of systematic methods. We interviewed 16 health managers to determine the meaning they ascribe to these four components in their practice in a developing country, Haïti. We found that learning was often informal and that all managers attached a negative meaning to the use of judgment. Working in groups was favored by all managers, while the health managers viewed the use of systematic methods differently than do evaluators. The administrative health managers generally ranked lower in propensity for PPE than did their clinical colleagues. Implications for the practice of evaluation are discussed in relation to the work styles exhibited by managers in everyday practice, the proactive repetition of actions, the control exercised by formal procedures, and the collective versus “solitary” image of one's environment of action.     

Group Cohesion and Homework Adherence in Multi‐Family Group Therapy for Schizophrenia

This study examined the relationship between levels of group cohesion, defined as whole group relationships, and between‐session therapeutic homework adherence in a multi‐family group therapy (MFGT) for people with schizophrenia. Participants from 18 consenting families attending MFGT groups completed weekly homework adherence ratings, group cohesion and spontaneous between‐session activity measures. Levels of group cohesion at each session were compared with measures of scheduled and spontaneous homework adherence reported at the next session. It was hypothesised that higher levels of group cohesion would be related to homework adherence and other spontaneous between‐session therapeutic activity completed by group members. Results show higher levels of group cohesion were associated with higher rates of spontaneous between‐session therapeutic activity. However, contrary to expectations no significant relationship between cohesion and scheduled homework completion was found. The implications of the findings for group processes and homework adherence are discussed.     

College students' views on gay and lesbian issues: does education make a difference

Many in academia believe that higher education leads to an increase in tolerance towards individuals who are different. There are some empirical findings to support this premise; however, the impact of higher education on acceptance of homosexuality has not been adequately explored. Gays and lesbians in society face many negative attitudes. Based upon the survey results of 364 students at a Midwestern university, juniors and seniors had statistically significant more positive attitudes towards gays and lesbians than did freshmen and sophomores. Even in multi-variate analysis, upper-level students had more positive views on many of the attitudinal measures.     

Feasibility as a mechanism for model identification and validation

As new technologies permit the generation of hitherto unprecedented volumes of data (e.g. genome-wide association study data), researchers struggle to keep up with the added complexity and time commitment required for its analysis. For this reason, model selection commonly relies on machine learning and data-reduction techniques, which tend to afford models with obscure interpretations. Even in cases with straightforward explanatory variables, the so-called ‘best’ model produced by a given model-selection technique may fail to capture information of vital importance to the domain-specific questions at hand. Herein we propose a new concept for model selection, feasibility, for use in identifying multiple models that are in some sense optimal and may unite to provide a wider range of information relevant to the topic of interest, including (but not limited to) interaction terms. We further provide an R package and associated Shiny Applications for use in identifying or validating feasible models, the performance of which we demonstrate on both simulated and real-life data.     

大开眼界看朝阳

<正>来中国留学已经一段时间了,去过的地方也不少,可是给我留下最深印象的却是一个很多人都不知道的城市——辽宁的朝阳。在辽宁生活的时间里,我一直觉得辽宁是一个很普通没有什么吸引力的地方。但参加了沈阳师范大学特色班的"留学生辽宁文化考察活动"以后,我忽然发现,原来在这