小学生代数运算规则的样例学习

采用完整或不完整样例,对180名六年级小学生用样例学习两种代数运算规则进行了实验研究。结果显示：多数被试难以学会“平方差”运算规则,只有少数被试学会了“完全平方和”运算规则;反馈对不完整样例的学习效果有促进作用;用不完整样例学习难度不同的规则,其效果不同;在无反馈条件下,完整样例的学习效果都好于不完整样例;在有反馈的情况下,只有删除一步运算步骤样例的学习效果比完整样例的学习效果好     

四则混合运算规则的样例学习

采用有或无“运算步骤标记”两种样例和“交互式”样例呈现方式,对48名二年级小学生通过样例学习四则混合运算规则进行了实验。结果表明,多数被试可以通过样例学会“小括号”和“中括号”四则混合运算规则,但多数被试难以学会“无括号”四则混合运算规则;运算步骤标记对学习“无括号”运算规则的促进作用明显,但对学习“小括号”运算规则的促进作用不明显;运算规则学习的难度不同,所需样例的数量也不同。     

Protoalgebraic Gentzen Systems and the Cut Rule

In this paper we show that, in Gentzen systems, there is a close relation between two of the main characters in algebraic logic and proof theory respectively: protoalgebraicity and the cut rule. We give certain conditions under which a Gentzen system is protoalgebraic if and only if it possesses the cut rule. To obtain this equivalence, we limit our discussion to what we call regular sequent calculi, which are those comprising some of the structural rules and some logical rules, in a sense we make precise. We note that this restricted set of rules includes all the usual rules in the literature. We also stress the difference between the case of two-sided sequents and the case of many-sided sequents, in which more conditions are needed.     

小学儿童亲社会价值取向发展的实验研究

本研究采用问卷法对小学二年级、四年级和六年级学生共337人进行研究.结果表明,小学二、四、六年级儿童的亲社会价值取向在某些情境中存在差异.男女儿童的价值取向存在显著差异,女性比男性更加明确自己的价值取向,更愿意对受难者给予直接的关怀和帮助.不同价值取向的儿童在教师评价中表现出显著的亲社会行为差异.     

Counting to Infinity: Does Learning the Syntax of the Count List Predict Knowledge That Numbers Are Infinite?

By around the age of 5½, many children in the United States judge that numbers never end, and that it is always possible to add 1 to a set. These same children also generally perform well when asked to label the quantity of a set after one object is added (e.g., judging that a set labeled “five” should now be “six”). These findings suggest that children have implicit knowledge of the “successor function”: Every natural number, n, has a successor, n + 1. Here, we explored how children discover this recursive function, and whether it might be related to discovering productive morphological rules that govern language-specific counting routines (e.g., the rules in English that represent base-10 structure). We tested 4- and 5-year-old children’s knowledge of counting with three tasks, which we then related to (a) children’s belief that 1 can always be added to any number (the successor function) and (b) their belief that numbers never end (infinity). Children who exhibited knowledge of a productive counting rule were significantly more likely to believe that numbers are infinite (i.e., there is no largest number), though such counting knowledge was not directly linked to knowledge of the successor function, per se. Also, our findings suggest that children as young as 4 years of age are able to implement rules defined over their verbal count list to generate number words beyond their spontaneous counting range, an insight which may support reasoning over their acquired verbal count sequence to infer that numbers never end.     

公民情感的法律确认:立法伦理的应有视域

公民情感的法律确认是基于公民行为选择中两难困境的应对之策。这一立法实践有其学理和历史的依据。将公民情感的法律确认纳入立法伦理的视域,将不仅有助于良法的创制,而且还因其逻辑地排除了司法活动的情感障碍和为公民奠定了守法的情感基础而有利于良法的有效实现。     

CAI下小学低年级学生的学习控制水平与元认知监控水平的关系

对５８名小学三年级学生在ＣＡＩ（计算机辅助教学）下自学加法法现（规则学习）以及应用法则进行简便计算（技能学习）时学生学习控制水平（即选择学习内容和控制学习步调的适当性）与元认知监控水平（即对自己学习效果进行评价的准确性）之间的关系进行了探讨。结果表明,（１）在规则学习中,ＣＡＩ学习控制水平与元认知监控水平之间不存在显著性相关,但在技能学习中,两者之间存在显著性相关;（２）规则学习的学习控制水平显著高于技能学习。（３）ＣＡＩ学习控制水平和元认知监控水平两者与学生的学习成绩和时间两者不存在显著性相关。     

Priority rule signalization under two visibility conditions: Driving simulator study on speed and lateral position

In literature, priority-controlled and right-hand priority intersections have rarely been compared on other elements than the number of right-of-way violations and collisions. This study investigates the effect on speed and lateral position of five priority rules under two visibility conditions at an intersection (without hierarchy between branches), which is, at this moment, a knowledge gap.Fifty participants drove five different routes in a simulator and were exposed to the following manipulations: priority to the right rule applying and indicated (road sign and road sign with road marking), priority to the right rule applying but not indicated (no sign), priority to the right rule not applying and indicated (priority road and priority at next intersection), under good and bad visibility.Results show a significant speed decrease for both situations where the priority to the right rule was indicated compared to situations with no priority to the right rule, especially when visibility was bad. Priority to the right signs with additional road marking resulted in lowest speed under both visibility conditions. For all priority rules, lateral position shifted more towards the middle of the road when visibility was bad.Since speed was higher in case of priority roads or roads with priority at next intersection, it can be concluded that a higher level of control (priority-controlled intersections) does not necessarily result in a traffic safety improvement. Therefore, policy makers should take into account the results of this study and not generally change all the priority to the right intersections by priority-controlled intersections.     

Process Overlap Theory: A Unified Account of the General Factor of Intelligence

The most replicated result in the field of intelligence is the positive manifold, which refers to an all-positive pattern of correlations among diverse cognitive tests. The positive manifold is typically described by a general factor, or g. In turn, g is often identified as general intelligence, yet this explanation is contradicted by a number of results. Here we offer a new account of g: process overlap theory. According to the theory, cognitive tests tap domain-general executive processes, identified primarily in research on working memory, as well as more domain-specific processes. Executive processes are tapped in an overlapping manner across cognitive tests such that they are required more often than domain-specific ones. The theory provides an account of a number of findings on human intelligence. As well, it is formalized as a multidimensional item response model and as a structural model, and the neural mechanisms underlying the proposed overlapping processes are discussed.