The Diverse Experiences of Hispanic Students in the American Educational System

Hispanic students have long been considered at risk in the American educational system. A better understanding of the diverse experiences of Hispanics can help to counteract this risk—in what ways, and where, do they do well or poorly or some mixture of both? To further this understanding, this study applies developmental and demographic perspectives to a representative sample of Hispanic high school students. First, analyses of the sample identified four student profiles based on various indicators of academic achievement and school orientation: (1) low-achieving and weakly oriented, (2) low-achieving and strongly oriented, (3) high-achieving and moderately oriented, (4) high achieving and strongly oriented. Second, compositional analyses mapped these profiles onto different segments of the Hispanic population and different sectors of the American educational system.     

What is Loss Aversion?

A behavioral definition of loss aversion is proposed and its implications for original and cumulative prospect theory are analyzed. Original prospect theory is in agreement with the new loss aversion condition, and there utility is capturing all effects of loss aversion. In cumulative prospect theory loss aversion is captured by both the weighting functions and the utility function. Further, some restrictions apply for the weighting functions involved in the latter model.We are indebted to Michèle Cohen and Peter Wakker for helpful comments. The suggestions of an anonymous referee have improved the presentation of the paper.     

On the Bayesian analysis of categorical data: the problem of nonresponse

It is demonstrated how a suitably chosen prior for the frequency parameters can streamline the Bayesian analysis of categorical data with missing entries due to nonresponse or other causes. The two cases where the data follow the Multinomial or the Hypergeometric model are treated separately. In the first case it is adequate to restrict the prior (for the cell probabilities) to the class of Dirichlet distributions. In the case of the Hypergeometric model it is convenient to select a prior from the class of Dirichlet-Multinomial (DM) distributions. The DM distributions are studied in some details.     

Brief Family Therapy: A Metaphorical Task

This article presents a therapeutic procedure designed to prescribe, in metaphorical form, the family's troublesome behavior pattern. Particular attention is paid to using a compliment to precede delivering a task assignment as a method of increasing the likelihood that the family will perform the task, and thus change will be promoted. A case example is used to illustrate the use of this procedure to help make change less painful.     

原子簇的合成方法、性质表征与结构

利用给电子有机和无机配位体的交换反应和金属卤化物与羰基金属阴离子的复分解反应,合成异核原子簇具有反应条件温和易于控制,收率较高的特点。本文描述Fe_3(CO)_9(C_2H_2)_3等11个原子簇的合成方法,配位状态与簇核的结构。