background and purpose: emergency physicians play an important role in the immediate diagnosis of bioterrorism activities. the present study was conducted with the purpose of comparing the effectiveness of virtual learning and classroom learning in approach to bioterrorism and chemical terrorism for emergency physician s. methods: this was a semi-empirical study, which was conducted via testing...

The faecal egg count reduction (FECR) in faeces is the most widely used method to assess the efficacy of anthelmintics against gastrointestinal strongyles. Several methods are used and they yield different efficacy values. They give important weight to those animals which excrete the majority of eggs, before or after treatment. We propose using individual animal FECR tests that give equal weigh...

a r t i c l e i n f o Keywords: Black–White differences Cognitive abilities Cross-cultural comparison Measurement equivalence Measurement invariance This paper presents a systematic review of published data on the performance of sub-Saharan Africans on Raven's Progressive Matrices. The specific goals were to estimate the average level of performance, to study the Flynn Effect in African samples...

We consider methods proposed for detecting localized spatial clustering. We propose a new test statistic, the weighted average likelihood ratio test, as an alternative to the spatial scan (maximum likelihood ratio) test statistic. Two different types of weights are considered. We propose an unbiased cluster selection criterion and evaluate the bias of the tests through simulation. We also exami...