服务学习促进大学生批判性思维的干预研究

采用准实验设计教学干预,将75名心理学专业本科生分为实验组(n=54)和对照组(n=21),实验组进行为期10周的结构化服务学习活动(每周2小时),对照组给予匹配任务(文献阅读和翻译总结)。采用反思日志中的开放性问题和非服务学习领域的结构不良情景问题为测验材料,利用自编的问题解决中的批判性思维表现编码表,对服务学习活动前后和过程中相关材料进行编码,探讨服务学习中服务组学生批判性思维的变化及其在非服务学习领域结构不良问题解决中的迁移效果。结果表明服务学习对大学生的批判性思维表现具有显著促进作用,主要体现在方案改进维度上,这种促进作用可以迁移到非服务学习领域问题解决的批判性思维表现中。     

Fonctions exécutives,vieillissement cognitif et variations stratégiques

Aging is characterized by a decrease of cognitive performance in most of cognitive domains. One of the most fundamental issues is then to know what are the underlying mechanisms of these age-related changes in human cognition. Recent research suggests that in addition to speed of processing and working memory capacities, age-related impairment in executive functioning plays an important role in the cognitive decline associated to aging. Above and beyond performance, current research shows that the mediating role of executive function in age-related changes in cognitive performance occurs via changes in strategies variations (i.e., repertoire, distribution, execution, and selection of the strategies used to accomplish a cognitive task). In this article, we illustrate both strategic variations and underlying executive control mechanisms in two important cognitive domains : episodic memory and problem solving.     

Bluffing and betting behavior in a simplified poker game

A pure‐strategy, simplified poker (PSP) game is proposed, where two players draw from a small and discrete number of hands. Equilibrium strategies of the game are described and an experiment is conducted where 120 subjects played the PSP against a computer, which was programmed to play either the equilibrium solution or a fictitious play (FP) learning algorithm designed to take advantage of poor play. The results show that players did not adopt the cutoff‐type strategies predicted by the equilibrium solution; rather they made considerable “errors” by: Betting when they should have checked, checking when they should have bet, and calling when they should have folded. There is no evidence that aggregate performance improved over time in either condition although considerable individual differences were observed among subjects. Behavioral learning theory (BLT) cannot easily explain these individual differences and cognitive learning theory (CLT) is introduced to explain the apparent anomalies. Copyright © 2009 John Wiley & Sons, Ltd.     

大学生学科问题类比迁移的实验研究

考察了单个和两个源问题条件下大学生学科问题类比迁移的情况。实验1考察表面特性对学科问题迁移成绩的影响,以及个体的时间控制、解题策略。实验2考察两个源问题表面相似关系和思路归纳关系对迁移成绩的影响。结果表明：1)表面相似性对迁移成绩影响显著,同领域学科问题之间更容易迁移;2)依据表面和依据结构来激活源问题都是有效策略．源问题学习时间与迁移效果之间不存在显著关系;3)思路归纳对迁移成绩影响显著。     

Drivers and outcomes of salespersons’ value opportunity recognition competence in solution selling

Abstract

In B2B markets, firms seek to provide customer solutions instead of merely selling goods or services. As boundary-spanners, salespeople are pivotal for implementing this strategic shift. Yet, extant literature provides limited insights into salesperson’s resources and competencies required for customer solutions, particularly in the early phases of solution selling. This research focuses on salesperson’s value opportunity recognition competence (VOR), which is a central requirement for salespeople to be able to navigate the early phases of solution selling. Analyzing large-scale, multi-level data of 799 salespeople and their respective sales managers in 29 sales organizations, the authors investigate the role of different salesperson resources and work environment characteristics for strengthening their VOR. The authors find that salespeople need both customer and technical knowledge, but customer knowledge is more important. Salespeople also can substitute individual technical knowledge with strong internal relations, but strong customer relations are no substitute for individual knowledge about customers’ business models and processes. Formalization turned out to be a double-edged sword in the context of VOR development, while transformational leadership has positive effects only. The findings bear concrete implications for improving the selection, training, and work environment of solution salespeople.