试论必要条件假言联锁推理的推理形式

目前,逻辑学界在必要条件假言联锁推理的推理形式上,仍然是说法不一,这不易于学生学习和掌握。实际上,必要条件假言联锁推理有四种推理形式,即肯定后件的形式、否定前件的形式、肯定前件的形式、否定后件的形式。     

幼儿概率推理水平及源自教育的可能影响研究

研究者在对幼儿概率推理能力探讨的过程中,曾经深受Piaget的＂幼儿不具备概率推理能力＂这一传统观点的影响,但后续的研究逐渐发现幼儿是具备一定概率推理能力的。随着研究的进展,最近的研究又发现,幼儿在概率推理方面不仅能够考虑到基础概率,还具备根据事后概率对先前概率判断进行修正的能力。     

Transformations and Transfer: Preschool Children Understand Abstract Relations and Reason Analogically in a Causal Task

Previous research suggests that preschoolers struggle with understanding abstract relations and with reasoning by analogy. Four experiments find, in contrast, that 3- and 4-year-olds (N = 168) are surprisingly adept at relational and analogical reasoning within a causal context. In earlier studies preschoolers routinely favored images that share thematic or perceptual commonalities with a target image (object matches) over choices that match the target along abstract relations (relational matches). The present studies embed such choice tasks within a cause-and-effect framework. Without causal framing, preschoolers strongly favor object matches, replicating the results of previous studies. But with causal framing, preschoolers succeed at analogical transfer (i.e., choose relational matches). These findings suggest that causal framing facilitates early analogical reasoning.     

Counterfactual Reasoning: Developing a Sense of "Nearest Possible World"

This study investigated at what point in development 3- to 6-year-old children begin to demonstrate counterfactual reasoning by controlling for fortuitously correct answers that result from basic conditional reasoning. Basic conditional reasoning occurs when one applies typical regularities (such as "If 'whenever' it doesn't rain the street is dry") to counterfactual questions (such as "If it had not rained, would the street be wet or dry?") without regard to actual events (e.g., if street cleaners had just been washing the street). In counterfactual reasoning , however, the conditional reasoning must be constrained by actual events (according to the "nearest possible world"). In situations when counterfactual reasoning and basic conditional reasoning would yield the same answers, even the youngest children gave mostly correct answers. However, tasks in which the 2 reasoning strategies resulted in different answers proved unusually difficult even for the older children.     

"I'm Happy with My Mommy": Low-Income Preschoolers' Causal Attributions for Emotions

This study examined low-income African American and European American preschoolers' socioemotional causal attributions. Forty-seven Young (M = 48 months) and Old (M = 62 months) preschoolers were asked to justify a puppet's current emotion and to talk about their past emotional experiences. Responses were coded for Causal Theme and Clarity. Old preschoolers were twice as likely to attribute interpersonal themes, and Young preschoolers were 4 times more likely to generate causal themes that were uncodeable. In terms of clarity, children provided clearer responses for anger and fear than they did for happiness. Old preschoolers' explanations for emotions were clearer than young preschoolers' and young African Americans', who had the most difficulty explaining emotions. Results indicate that younger preschoolers, particularly young African Americans, may need help articulating emotions. Suggestions for how adults can scaffold preschoolers' emotional reasoning are discussed.     

对自然推理系统 PN 中假设前提销去规则(Hyp-)的理解

自然推理系统中假设前提销去规则是指在引入假设前提推导出结论的过程中,运用蕴涵引入规则构造一个蕴涵式,从而销去假设前提。根据充分条件假言命题为真的情况下前后件之间的关系,只要构造的蕴涵式的前后件都为真,或者前后件都为假,或者前件为假且后件为真,那么这个蕴涵式的逻辑值就是真的,这样就可以销去假设前提了。     

Preschool children's reasoning about ability

Young children's reasoning about ability was investigated among 155 preschoolers (M = 4 years, 10 months) across 3 studies. Results suggest that preschoolers are sensitive to mental state information when making judgments about another child's ability: They judged a child who finds a task easy to be smarter than one who finds the same task hard. Systematic patterns of errors on recall tasks suggest that preschoolers perceive positive correlations between (a) exerting effort and experiencing academic success, and (b) being nice and having high academic ability. Results from a comparison group of forty 9- to 10-year-olds (M = 9 years, 10 months) suggest that the preschool findings generally reflect emerging patterns of reasoning about ability that persist into later childhood, but that the perceived correlations between high effort and academic outcomes and between social and academic traits diminish with age.     

Early Differentiation of Causal Mechanisms Appropriate to Biological and Nonbiological Kinds

Although Piaget characterized young children as precausal until about 7-8 years of age, recent work indicates that preschoolers do honor fundamental principles of causality. This literature has mainly focused on general principles invoked in reasoning about mechanical events. By contrast, the present study examined whether children differentiate between the causal mechanisms appropriate for different conceptual domains. The results of 3 preliminary investigations and 1 main experiment suggested that preschoolers prefer natural mechanisms for color inheritance in biological kinds, particularly when causal substrates resemble their consequences. By contrast, the same children recognized the importance of human intentions in producing the color of an artifact, and also judged that mechanical mechanisms serve to mediate between intentions and outcomes. The results are relevant to recent studies on the development of biological thought, and overall suggest that early causal reasoning reflects both domain-specific and domain-general principles.     

再论联结项与假言命题类型之间的或然性关系—并复焦克先生对《“除非”类假言命题新论》一文的质疑

充分条件假言命题的联结项和必要条件假言命题的联结项也可以充当充分必要条件假言命题的联结项,联结项与假言命题类型之间的这种或然性关系决定,判断一个假言命题的类型往往不能单纯依据联结项而必须同时分析前后件两个假言支之间的逻辑联系。正是把假言命题中的联结项与假言命题类型之间的或然性关系当作必然性关系,导致我国逻辑学教科书长期以来把“除非”类假言命题的三种类型统统视为必要条件假言命题的谬误。     

Exploring the deep-level reasoning questions effect during vicarious learning among eighth to eleventh graders in the domains of computer literacy and Newtonian physics

This paper tested the deep-level reasoning questions effect in the domains of computer literacy between eighth and tenth graders and Newtonian physics for ninth and eleventh graders. This effect claims that learning is facilitated when the materials are organized around questions that invite deep-reasoning. The literature indicates that vicarious learners in college student populations show greater pretest to posttest learning gains when presented with deep-level reasoning questions before each content sentence, than when deep-level questions are omitted, or when learners interact with an intelligent tutoring system. This effect holds for vicarious learners across grade levels and domains.     

The Mind's "I": Children's Conception of the Mind as an Active Agent

1 hypothesis about children's developing conception of the mind is that preschoolers are limited to an understanding that persons have internal, mental contents like thoughts and beliefs, whereas older children and adults conceive of the mind itself as an independent, active structure or processor. Adults' conception of the mind in this independent active fashion seems evident in their use of personified mental metaphor (e.g., "My mind tricked me"). 3 studies examined the development and consolidation of this active, personified view. Study 1 provided an analysis of natural language data regarding 1 child's uses of vision words such as see and look from age 2 1/2 to 8 years. We examined the child's use of such words to refer literally to perception (e.g., "I see the TV") and also to refer nonliterally to active mental processes such as comprehension and inference (e.g., "I see what you mean"). Studies 2 and 3 examined 6-, 8-, and 10-year-olds' comprehension and production of mental metaphors. In a metaphor comprehension task, we asked children to interpret personified metaphoric statements about the mind (e.g., "My mind wandered") and 3 comparison domains, mechanics (e.g., "The car is dead"), nature (e.g., "The wind is howling"), and emotion (e.g., "Her heart was smiling"). In an explanation task, we asked children to explain the processes underlying the making of both instant photos and mental images. The findings reveal a developing ability to interpret and produce statements personifying the mind and provide considerable evidence about children's movement toward a conception of the mind as an independent entity deserving reference and conceptualization in its own right.     

The nature of advanced reasoning and science instruction

Although the development of reasoning is recognized as an important goal of science instruction, its nature remains somewhat of a mystery. This article discusses two key questions: Does formal thought constitute a structured whole? And what role does propositional logic play in advanced reasoning? Aspects of a model of advanced reasoning are presented in which hypothesis generation and testing are viewed as central processes in intellectual development. It is argued that a number of important advanced reasoning schemata are linked by these processes and should be made a part of science instruction designed to improve students' reasoning abilities. Concerning students' development and use of formal reasoning, Linn (1982) calls for research into practical issues such as the roles of task-specific knowledge and individual differences in performance, roles not emphasized by Piaget in his theory and research. From a science teacher's point of view, this is good advice. Accordingly, this article will expand upon some of the issues raised by Linn in a discussion of the nature of advanced reasoning which attempts to reconcile the apparent contradiction between students' differential use of advanced reasoning schemata in varying contexts with the notion of a general stage of formal thought. Two key questions will be discussed: Does formal thought constitute a structured whole? And what role does propositional logic play in advanced reasoning? The underlying assumption of the present discussion is that, among other things, science instruction should concern itself with the improvement of students' reasoning abilities (cf. Arons, 1976; Arons & Karplus, 1976; Bady, 1979; Bauman, 1976; Educational Policies Commission, 1966; Herron, 1978; Karplus, 1979; Kohlberg & Mayer, 1972; Moshman & Thompson, 1981; Lawson, 1979; Levine & linn, 1977; Pallrand, 1977; Renner & Lawson, 1973; Sayre & Ball, 1975; Schneider & Renner, 1980; Wollman, 1978). The questions are of interest because to date they lack clear answers, yet clear answers are necessary if we hope to design effective instruction in reasoning.     

I'm Happy with My Mommy: Low-Income Preschoolers' Causal Attributions for Emotions

This study examined low-income African American and European American preschoolers' socioemotional causal attributions. Forty-seven Young (M = 48 months) and Old (M = 62 months) preschoolers were asked to justify a puppet's current emotion and to talk about their past emotional experiences. Responses were coded for Causal Theme and Clarity. Old preschoolers were twice as likely to attribute interpersonal themes, and Young preschoolers were 4 times more likely to generate causal themes that were uncodeable. In terms of clarity, children provided clearer responses for anger and fear than they did for happiness. Old preschoolers' explanations for emotions were clearer than young preschoolers' and young African Americans', who had the most difficulty explaining emotions. Results indicate that younger preschoolers, particularly young African Americans, may need help articulating emotions. Suggestions for how adults can scaffold preschoolers' emotional reasoning are discussed.     

From “Forest Fires” and “Hunting” to Disturbing “Habitats” and “Food Chains”: Do Young Children Come up with any Ecological Interpretations of Human Interventions Within a Forest?

This study aims at highlighting young children’s reasoning about human interventions within a forest ecosystem. Our focus is particularly set on whether preschoolers are able to come up with any basic ecological interpretations of human actions upon forest plants or animals and how. Conducting individual, semi-structured interviews with 70 preschoolers (age 4–5), we first tested their ability to consider the forest as a habitat and recognize simple food chains in it, and then we traced their reasoning about the consequences that human actions upon plants or certain forest animals may possibly have for other animals that also live in the forest. The analysis of our qualitative data with “NVivo” software does reveal an ecological aspect in preschoolers’ reasoning, which is thoroughly discussed in the paper.     

The influence of a gesture-based learning approach on preschoolers’ learning performance,motor skills,and motion behaviors

This study developed a gesture-based learning approach to build a virtual interactive learning environment for preschoolers by combining a gesture-based computing device and a game-based learning model. Using sequential analysis, this study investigated how this approach influenced children’s learning performance, motor skills, and motion behaviors. A quasi-experiment was conducted with 142 kindergarten-level-3 preschoolers. The results showed that the gesture-based learning approach improved the students’ learning performance and motor skills compared with the traditional activity-based learning approach. The main learning pattern showed that the preschoolers controlled their body motion behaviors and movements to learning cognitive knowledge, which achieving a flow state that improved preschoolers’ learning performance and motor skills. In addition, the main motion pattern showed that the preschoolers interacted with the game by coordinating their body movement with the projected human skeleton’s movement, which improved their motor skills.     

Correlates of formal reasoning: Content and problem effects

Piaget's structural theory of formal thought suggests that a general construct of formal reasoning exists. The content of the task and type of problem employed are often ignored in Piagetian based studies but are important for generalizing findings to other studies and to educational problems. The study reported here examines content and problem effects of formal thought in 13-year-old adolescents. Specifically, three controlling variables tasks with different content and two question type tests (analysis and controlling questions) were administered to 120 seventh graders. Ability measures and personality dimensions associated with formal reasoning in the literature are used to clarify what formal reasoning is and how content and problem type are involved in formal reasoning. Significant main effects were found for problem and content effects (p = 0.001), and a significant interaction was found between the two (p = 0.001). Across the three tasks general ability, field dependency, and locus of control were consistently and significantly related to the controlling questions. However, only measures of field dependency were related to the analysis questions. Combinations of ability and personality factors were found to be uniquely related to each task, within each question type. Results have implications for a theory of formal thought and the teaching of the controlling variables strategy.     

Imitative learning in Japanese quail (<Emphasis Type="Italic">Coturnix japonica</Emphasis>) using the bidirectional control procedure

In the bidirectional control procedure, observers are exposed to a conspecific demonstrator responding to a manipulandum in one of two directions (e.g., left vs. right). This procedure controls for socially mediated effects (the mere presence of a conspecific) and stimulus enhancement (attention drawn to a manipulandum by its movement), and it has the added advantage of being symmetrical (the two different responses are similar in topography). Imitative learning is demonstrated when the observers make the response in the direction that they observed it being made. Recently, however, it has been suggested that when such evidence is found with a predominantly olfactory animal, such as the rat, it may result artifactually from odor cues left on one side of the manipulandum by the demonstrator. In the present experiment, we found that Japanese quail, for which odor cues are not likely to play a role, also showed significant correspondence between the direction in which the demonstrator and the observer push a screen to gain access to reward. Furthermore, control quail that observed the screen move, when the movement of the screen was not produced by the demonstrator, did not show similar correspondence between the direction of screen movement observed and that performed by the observer. Thus, with the appropriate control, the bidirectional procedure appears to be useful for studying imitation in avian species.     

Assessment of Preschooler’s Scientific Reasoning in Adult–Child Interactions: What Is the Optimal Context?

In educational settings, continuous assessment of the child’s level of understanding is necessary to effectively utilize the principles of scaffolding and to create contexts that can advance the scientific reasoning of the child. In this article, we argue that a child’s performance is a dynamic notion that is created by all elements in an interaction, including the task. Therefore, we studied preschoolers’ levels of scientific reasoning varying different properties of the assessment context. Young children were interviewed about four scientific tasks using one out of four different protocols (varying in the degree of flexibility and adaptiveness) by an adult. In the first study, different task contents resulted in different performance levels. The second study indicated that the most structured protocol elicited the highest maximum level of reasoning in children and the highest percentage of correct predictions. The third study showed differences between the protocols in the adult’s verbal behavior. Adaptation in verbal behavior to different children by the adult did not result in higher scientific understanding by the children, whereas a higher degree of task structure did. Combined, the studies emphasize the importance of context, which has implications for assessment and teaching situations.