Mental models of the earth: A study of conceptual change in childhood

This paper presents the results of an experiment which investigated elementary school children's conceptual knowledge about the earth. First-, 3rd-, and 5th- grade children were asked a series of questions about the shape of the earth. Children's responses to these questions revealed considerable apparent inconsistency. For example, many children said that the earth is round but also stated that it has an end or edge from which people could fall. A great deal of this apparent inconsistency could be explained by assuming that the children used, in a consistent fashion, a mental model of the earth other than the spherical earth model. Five alternative mental models of the earth were identified: the rectangular earth, the disc earth, the dual earth, the hollow sphere, and the flattened sphere. It is argued that these models are constrained by certain presuppositions which children form based on interpretations of their everyday experience. Some of these models (the rectangular earth and the disc earth) seem to be initial models children construct before they are exposed to the culturally accepted information that the earth is a sphere. In the process of knowledge acquisition, children appear to modify their initial models to make them more consistent with the culturally accepted model by gradually reinterpreting their presuppositions. Synthetic models (such as the hollow sphere and the flattened sphere) are generated by children as a solution to the problems arising from the inconsistency between their initial model of a flat earth and the culturally accepted, scientific model of a spherical earth. Children come to understand that the earth is a sphere only when the presuppositions that gave rise to their initial models have been reinterpreted.     

The importance of gesture in children's spatial reasoning

On average, men outperform women on mental rotation tasks. Even boys as young as 4 1/2 perform better than girls on simplified spatial transformation tasks. The goal of our study was to explore ways of improving 5-year-olds' performance on a spatial transformation task and to examine the strategies children use to solve this task. We found that boys performed better than girls before training and that both boys and girls improved with training, whether they were given explicit instruction or just practice. Regardless of training condition, the more children gestured about moving the pieces when asked to explain how they solved the spatial transformation task, the better they performed on the task, with boys gesturing about movement significantly more (and performing better) than girls. Gesture thus provides useful information about children's spatial strategies, raising the possibility that gesture training may be particularly effective in improving children's mental rotation skills.     

Replication of nonvocal system for teaching nonreaders to read in an adult training centre

An attempt was made to replicate a study to evaluate a system used by Kuntz, et al. in 1978 to teach children with mental handicaps to read. The original study was done in a children's hospital training centre with children who had considerable communication difficulties, whereas the present study was undertaken with adults with mental handicaps in an adult training centre. In the UK, adult training centres are currently at the centre of service provision by Social Services for the instruction of adults with mental handicaps, providing both a sheltered workshop and a practical educational situation. Nine out of 33 nonreaders completed the programme so the success rate was well short of that of the original study.     

Mom told me scary things about this animal: Parents installing fear beliefs in their children via the verbal information pathway

This study investigated whether fear beliefs can be installed in children after parents had received negatively tinted information about a novel stimulus. Parents of children aged 8-13 years (N = 88) were presented with negative, positive, or ambiguous information about an unknown animal and then given a number of open-ended vignettes describing confrontations with the animal with the instruction to tell their children what would happen in these situations. Results indicated that children's fear beliefs were influenced by the information that was provided to the parent. That is, parents who had received negative information provided more threatening narratives about the animal and hence installed higher levels of fear beliefs in their children than parents who had received positive information. In the case of ambiguous information, the transmission of fear was dependent on parents' trait anxiety levels. More precisely, high trait anxious parents told more negative stories about the unknown animal, which produced higher fear levels in children.     

Changing epistemological beliefs: The unexpected impact of a short‐term intervention

Background Previous research has shown that sophisticated epistemological beliefs exert a positive influence on students' learning strategies and learning outcomes. This gives a clear educational relevance to studies on the development of methods for promoting a change in epistemological beliefs and making them more sophisticated. Aims To investigate the potential for influencing domain‐specific epistemological beliefs through a short instructional intervention. Sample On the basis of their performance on a preliminary survey of epistemological beliefs, 58 students at a German university (87.7% females) with a mean age of 21.86 years (SD = 2.88) were selected. Half of them had more naive beliefs and the other half had more sophisticated ones. Methods Participants were randomly assigned to one of two groups: one whose epistemological beliefs were challenged through refutational epistemological instruction or another receiving non‐challenging informational instruction. The treatment effect was assessed by comparing pre‐ and post‐instructional scores on two instruments tapping different layers of epistemological beliefs (DEBQ and CAEB). Data were subjected to factor analyses and analyses of variance. Results According to the CAEB, the naive group receiving the refutational epistemological instruction changed towards a more sophisticated view, whereas the sophisticated students receiving the informational instruction changed towards an unintended, more naive standpoint. According to the DEBQ, all research groups except the naive refutational group revealed changes towards a more naive view. Conclusions This study indicates the possibility of changing domain‐specific epistemological beliefs through a short‐term intervention. However, it questions the stability and elaborateness of domain‐specific epistemological beliefs, particularly when domain knowledge is shallow.     

Mental models of the earth, sun, and moon: Indian children's cosmologies

This study reports data on the acquisition of knowledge about astronomy in children from India. Based on prior research, we hypothesized that the cosmological models that children construct are influenced by both first-order and second-order constraints on knowledge acquisition. First-order constraints are the implicit assumptions that govern the construction of initial cosmological models. Examples of such constraints include the assumptions that the earth is flat and supported. Such first-order constraints are presumed to be universal. Second-order constraints arise from the specific properties ascribed to cosmological objects. For example, representations of the earth's shape and location relative to the sun and moon constrain the kinds of mechanisms that are generated to account for the day-night cycle. We hypothesized that in cultures where both folk cosmologies and the scientific cosmological model are accessible to children, aspects of folk models are likely to be incorporated in children's cosmologies if they provide a psychologically easier way of satisfying first-order constraints. This hypothesis is supported by our findings with regard to universality and culture specificity in children's cosmologies. Indian children's cosmologies honor a variety of universal first-order constraints. These include constraints on the shape of the earth (e.g., support and flatness) and on the relative locations and motions of objects in the cosmology (e.g., continuity). However, many Indian children borrow the idea that the earth is supported by an ocean or a body of water from folk cosmology. This solution to the support constraint on the shape of the earth is not found in American children's initial cosmologies.     

Children's representations of the earth: A methodological comparison

Investigation of children's understanding of the earth can reveal much about the origins and development of scientific knowledge. Vosniadou and Brewer (1992) claim that children construct coherent, theory‐like mental models of the earth. However, more recent research has indicated that children's knowledge of the earth is fragmented and incoherent. By testing the influence of question type (open vs. forced‐choice questions) and medium (drawings vs. 3‐D models) on the responses of 6‐year‐olds (N=59), this study investigated whether, and how, methodological differences account for the discrepant findings of previous research. Both the use of drawings and of open questions (Vosniadou and Brewer's methods) were found to increase the apparent incidence of naïve mental models. Moreover, the combination of 3‐D models and forced‐choice questions elicited more scientifically correct responses and higher proportions of scientific and inconsistent mental models than the combination of drawings and open questions. It is argued that children know more about the earth than the mental model theorists claim, and that naïve mental models of the earth are largely artifactual.     

Culture and children's cosmology

In this investigation, we examined children's knowledge of cosmology in relation to the shape of the earth and the day-night cycle. Using explicit questioning involving a choice of alternative answers and 3D models, we carried out a comparison of children aged 4-9 years living in Australia and England Though Australia and England have a close cultural affinity, there are differences in children's early exposure to cosmological concepts. Australian children who have early instruction in this domain were nearly always significantly in advance of their English counterparts. In general, they most often produced responses compatible with a conception of a round earth on which people can live all over without falling off. We consider coherence and fragmentation in children's knowledge in terms of the timing of culturally transmitted information, and in relation to questioning methods used in previous research that may have underestimated children's competence.     

Development of beliefs about the origins and controllability of dreams.

In three studies the authors investigated the development of beliefs about dreaming. Study 1 assessed 3- to 5-year-old children's beliefs about the origins and controllability of dreams. Results revealed significant changes in children's beliefs about the roles of behavioral experiences and mental processes in the generation of dream content. Results also revealed that young children consider both dreams and imagination to be highly controllable. In Study 2, preschool-age children, elementary school-age children, and adults received either imagination or dream stories and were questioned about controllability. In Study 3, emotional valence of the dream content was varied. Results of Studies 2 and 3 revealed significant development in beliefs that dreams are not subject to conscious control. Beliefs in controllability were higher among females. Study 3 showed that the emotional content of a dream affects these claims.     

Mental Models of the Day/Night Cycle

This article presents the results of an experiment which investigated elementary school children's explanations of the day/night cycle. First, third, and fifth grade children were asked to explain certain phenomena, such as the disappearance of the sun during the night, the disappearance of stars during the day, the apparent movement of the moon, and the alteration of day and night. The results showed that the majority of the children in our sample used in a consistent fashion a small number of relatively well-defined mental models of the earth, the sun, and the moon to explain the day/night cycle. These mental models of the day/night cycle were empirically accurate, logically consistent and revealed some sensitivity on the part of the children to issues of simplicity of explanation. The younger children formed Initial mental models which provided explanations of the day/night cycle based on everyday experience (e.g., the sun goes down behind mountains, clouds cover up the sun). The older children constructed synthetic mental models (e.g., the sun and the moon revolve around the stationary earth every 24 hours; the earth rotates in an up/down direction and the sun and moon are fixed on opposite sides) which represented attempts to synthesize the culturally accepted view with aspects of their Initial models. A few of the older children appeared to have constructed a mental model of the day/night cycle similar to the scientific one. A theoretical framework is outlined which explains the formation of initial, synthetic, and scientific models of the day/night cycle in terms of the reinterpretation of a hierarchy of constraints, some of which are present early in the child's life, and others which emerge later out of the structure of the acquired knowledge.     

珠心算训练儿童加法心算的ERP早成分研究

采用事件相关电位(ERP)的方法,对32名儿童进行了双位数加法心算实验,探讨了珠心算训练方式对儿童加法心算加工早期感知觉的影响。研究结果表明,与非珠心算训练儿童相比,在加法心算过程的早期阶段,珠心算训练儿童枕部P1、额中央区的N1波幅增大,而颞枕区N170以及额中央区P2波幅减小。本研究结果发现珠心算训练对儿童心算过程的早期感知有显著影响。     

Facilitating children's understanding of misinterpretation: explanatory efforts and improvements in perspective taking

The authors investigated children's understanding of how mistaken beliefs can arise through misinterpretation of ambiguous information. Children (N = 91), aged 4 to 5 years, were given pre- and posttests on their ability to infer a puppet's interpretation of a restricted-view drawing after the puppet had been led to an erroneous expectation about the drawing's identity. Before the posttest, the children received either self-explanation training or other-explanation training in which they explained the source of their own or a puppet's misinterpretations of drawings; a control group received no training. The children who received training improved from pre- to posttest, and those who had practiced explaining misinterpretations by referring to previously viewed pictures or to features of a target picture showed the greatest improvement. These results indicate that learning to explain misinterpretations can help children recognize situations in which misinterpretations are likely to occur.     

Contrasting two models of academic self‐efficacy – domain‐specific versus cross‐domain – in children receiving and not receiving special instruction in mathematics

In social cognitive theory, self‐efficacy is domain‐specific. An alternative model, the cross‐domain influence model, would predict that self‐efficacy beliefs in one domain might influence performance in other domains. Research has also found that children who receive special instruction are not good at estimating their performance. The aim was to test two models of how self‐efficacy beliefs influence achievement, and to contrast children receiving special instruction in mathematics with normally‐achieving children. The participants were 73 fifth‐grade children who receive special instruction and 70 children who do not receive any special instruction. In year four and five, the children's skills in mathematics and reading were assessed by national curriculum tests, and in their fifth year, self‐efficacy in mathematics and reading were measured. Structural equation modeling showed that in domains where children do not receive special instruction in mathematics, self‐efficacy is a mediating variable between earlier and later achievement in the same domain. Achievement in mathematics was not mediated by self‐efficacy in mathematics for children who receive special instruction. For normal achieving children, earlier achievement in the language domain had an influence on later self‐efficacy in the mathematics domain, and self‐efficacy beliefs in different domains were correlated. Self‐efficacy is mostly domain specific, but may play a different role in academic performance depending on whether children receive special instruction. The results of the present study provided some support of the Cross‐Domain Influence Model for normal achieving children.     

Utilization analysis of a pedestrian safety training program

A previously developed and analyzed pedestrian safety training program was used to teach appropriate street-crossing behaviors to kindergarteners and first graders. Adult crossing guards were trained to provide pedestrian safety instruction. Trained observers monitored the quality of instructions given by crossing guards and the pedestrian behavior of young children as they crossed the street. A multiple-baseline analysis of the effects of two training programs indicated that guards were able to deliver the pedestrian safety program to several groups of children with a high degree of competence after receiving a single videotape and role playing training session. Furthermore, children's level of appropriate street crossing increased contemporaneous to the change in guard behavior both on the street where training was delivered and on a second street where no training was previously delivered. Utilization analysis of the guard training program indicated that one cannot expect to produce consistently high levels of street-crossing behavior by implementing only the "show and tell" portions of the training package. Similarly, results suggested that one is unlikely to produce consistently high quality guard training behavior by only giving written instructions describing how pedestrian training should be administered.     

A behavioral route to dysfunctional representations: The effects of training approach or avoidance tendencies towards novel animals in children

We examined the effects of training to approach or avoid novel animals on fear-related responses in children. Ninety-five primary school children (9-13 years old) were instructed to repeatedly push away or pull closer pictures of novel animals. We tested whether this manipulation would lead to changes in self-reported attitudes, implicit attitudes, fear beliefs, and avoidance behaviors towards these animals.The training produced more positive self-reported attitudes towards the pulled animal and more negative attitudes towards the pushed animal. After the training, girls reported more fear and avoidance of the pushed animal than of the pulled animal, while such training effects were absent in boys. No significant training effects were observed on implicit attitudes. Interestingly, the level of anxiety disorder symptoms prior to training was related to some of the training effects: Stronger prior fear was related to stronger changes in self-reported attitudes, and in boys, also to fear beliefs.The finding that a simple approach-avoidance training influences children's fear-related responses lends support to general theories of fear acquisition in children as well as to models that try to explain the intergenerational transmission of anxiety. [184 words]     

Teaching preschoolers with disabilities to seek adult assistance in response to simulated injuries

Four preschool-aged children with disabilities received training to seek adult assistance in response to simulated injuries. The children first watched while the instructor modeled and verbalized a first-aid procedure for obtaining adult assistance when injured, and then they practiced the skill with instructor praise or correction. Following this practice with feedback, the children demonstrated their skill without instructor feedback. Generalization probes were conducted before and after training on the school playground and at the children's homes. A multiple baseline design across children was used to evaluate the effects of the program. Rapid increases in the children 's performances of this skill was demonstrated. Further, the posttraining generalization data indicated that the children's performance had generalized across the two settings (school playground and children's homes). More importantly, this skill maintained at 100% at a 1-month follow-up generalization probe.     

不同形式的语言介入对汉语儿童心理理论发展的干预

为比较语言本身和语言交流的情境过程对儿童心理理论的贡献以及欺骗在此过程中的作用,本研究采用前后测对照实验设计探查了不同形式的语言介入和相关欺骗训练对儿童心理理论发展的影响。选取语言能力达到常模水平但未通过外表－事实区分任务的4岁组儿童77名,随机分为3个训练组和1个对照组,对其进行心理理论和语言能力前测,在各组的两种能力发展水平相当的前提下,对3个训练组分别作如下处理：完全训练组：带有心理状态动词的补语句法及欺骗训练;情境交际组：伴随语言情境交际训练和欺骗训练;补语句法组：心理状态动词和补语句法训练。一周后进行心理理论后测。结果表明,3个训练组与对照组之间在心理理论表现上均有显著差异。相对于一般语言交流的情境过程,补语句法和心理状态动词更能显著提高儿童的心理理论;早期欺骗经历也能促进儿童心理理论的发展,若二者结合使用则更利于儿童心理理论的改进     

Indirect goal priming is more powerful than explicit instruction in children

This study examined the relative efficacy of explicit instruction and indirect priming on young children's behavior in a task that required a series of choices between a small immediate reward and a larger delayed reward. One hundread and six 4-year-old children were randomly assigned to one of four conditions involving one of two goals (maximize rewards or obtain immediate rewards) and one of two types of instruction (indirect priming using stories or explicit verbal instructions). Children were more likely to make goal-congruent choices as a result of indirect priming, but there was no effect of explicit instruction, suggesting that indirect approaches to changing young children's behavior may be more effective than direct approaches under some circumstances. These results have implications for understanding the dynamic interplay between bottom-up and top-down influences on self-regulation early in development.     

Children (but not adults) can inhibit false memories

The role of inhibition in children's (5-, 7-, and 11-year-olds') false memory illusions in the Deese-Roediger-McDermott (DRM) paradigm was examined using a list-wise directed-forgetting procedure. Children studied either a single DRM list (control) or two DRM lists in succession with a directed-remembering instruction or a directed-forgetting instruction between list presentations. The findings indicated that, like adults, children effectively suppressed the output of true memories when given a directed-forgetting instruction. Unlike adults, whose false memories are not attenuated in directed-forgetting conditions, children suppressed false memories at recall in the directed-forgetting condition. Because recognition data indicated that the children did generate false memories regardless of instruction, it appears that although adults' false memories are generated automatically and do not become part of their conscious experience, children's false memories are produced with greater effort and conscious processing, and as a result are easier to suppress at output.