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1.
The greater the dissimilarity between exteroceptive stimuli, the easier it is to discriminate between them. To determine whether a similar relationship holds for memories produced by reward events, rats in three runway investigations received trials in pairs, the number of food pellets (0.045 g) occurring on Trial 1 indicating whether reward or nonreward would occur on Trial 2. In each investigation, discriminative responding on Trial 2 was better the larger the difference in reward magnitude on Trial 1. This finding was obtained under a wide variety of conditions: for example, when the larger of two reward magnitudes on Trial 1 signaled nonreward on Trial 2 (Experiment 1, 10 vs. 2 pellets); when the smaller of two reward magnitudes on Trial 1 signaled nonreward on Trial 2 (Experiment 2, 10 vs. 2 pellets); and when the same magnitude of reward on Trial 1 signaled nonreward on Trial 2 (Experiment 3, either 5 pellets or 0 pellets). The findings obtained here indicate that the greater the dissimilarity between reward magnitudes, the greater the dissimilarity between the memories they produced and, thus, the easier it is to discriminate between them. It is suggested that the present results may provide a basis for understanding findings obtained in other instrumental learning investigations in which reward magnitude is varied. 相似文献
2.
We examined the use of balance and inverse methods in equation solving. The main difference between the balance and inverse methods lies in the operational line (e.g. +2 on both sides vs ?2 becomes +2). Differential element interactivity favours the inverse method because the interaction between elements occurs on both sides of the equation for the balance method but only on one side of the equation for the inverse method. In an experimental study, 63 students (mean age = 13) were randomly allocated to either balance or inverse group to undertake a pre-test, study an instruction sheet, complete acquisition equations, sit for a post-test and a concept test. Procedural knowledge was assessed on performance on practice equations and post-test, whereas conceptual knowledge was assessed on performance on the concept test. The inverse group outperformed the balance group on practice equations but not the post-test. Both the balance and inverse groups scored higher on the inverse concept test than the balance concept test. Positive association between performance on procedural knowledge and performance on conceptual knowledge was found for the inverse group but not the balance group. Overall, the evidence obtained indicates a number of educational implications for implementation. 相似文献
3.
Cross-language effects on reading skills are of particular interest in the context of foreign language immersion programs. Although there is an extensive literature on cross-language effects on reading in general, research focusing on immersion students and including different dimensions of reading acquisition such as reading fluency and reading comprehension is scarce. This study therefore investigated cross-language transfer between first-language (L1) and second-language (L2) reading fluency and reading comprehension in a group of 220 German elementary school students who were enrolled in English partial immersion programs. Students were tested in grades 3 and 4. Structural equation modeling was used to examine cross-language transfer in a cross-lagged panel design. Results showed moderate cross-language paths when controlling for autoregressive effects. These findings are in line with previous results showing reciprocal transfer effects between L1 and L2 reading comprehension and reading fluency. In addition, the overall dominance of paths from L2 to L1 over paths from L1 to L2 suggests immersion-specific relations that may be attributable to the plentiful opportunities for academic reading in the L2 at school. Hence, skills necessary for successful reading can evidently be acquired in an L2 context and transferred to the L1. These findings underline the importance of cross-language transfer between reading skills in immersion programs. 相似文献
4.
The aim of this study was to test whether Cummins’ Linguistic Interdependence Hypothesis (LIH) might also apply to writing, by determining to what extent writers’ text quality, source use and argumentation behavior are related in L1 and L2, how effective writers’ behavior is and whether their L2 proficiency influenced the relations between them. To answer these questions, twenty students wrote four short argumentative source based essays each in L1 (Dutch) and four in L2 (English). A within-writer cross-linguistic comparison of their texts revealed that their L1 and L2 writing competencies appear to be related. Furthermore, writers’ source use behavior differed to some extent between languages, but the strong positive correlations found between source use features suggest that in most cases this was more a person than a language effect. Similarly, for argumentation behavior, results showed some learner specific features (e.g. inclusion of titles and reference lists), but differences between languages for others (e.g. the inclusion of both arguments and counter-arguments). Effects of the different source use and argumentation features studied on text quality were limited and no clear effect of L2 proficiency on writers’ behavior or their influence on text quality were found. Overall, in line with earlier research, these findings provide some additional support for Cummins’ LIH and the idea that writers might have a common underlying source for writing related knowledge and practices which they can apply in multiple languages.
相似文献5.
J M Vogel 《Child development》1977,48(4):1532-1543
3 studies examined the development of recognition memory for the left-right orientation of pictures of common objects. In study 1, 5-year-olds, 9-year-olds, and college students were shown 20 pictures of objects. Subsequently, they were tested on their ability to discriminate between 10 of these pictures and their left-right mirror images and between the other 10 pictures and completely new ones. There were large developmental differences in memory for orientation, although all age groups could discriminate accurately between familiar pictures and completely new ones. In studies 2a and 2b, training concerning the relevance of orientation improved second and fourth graders' long-term memory for this characteristic, but training effects were minimal for kindergartners. However, even kindergarten children showed accurate short-term memory for orientation on the task used for training. In contrast to study 2, study 3 produced accurate long-term memory for orientation in kindergarten children by using a verbal training procedure. Results are discussed in terms of the range of memory factors involved in children's mirror-image confusions and in terms of general implications for the development of recognition memory. 相似文献
6.
H H Ratner 《Child development》1984,55(6):2173-2191
The primary purposes of this study were to determine the nature of and changes in early memory demands and to assess the relationship between memory demands and memory performance. 10 children at each of 2 ages--30 and 42 months--were observed in their homes for 4 2-hour sessions. Conversations between mothers and children were recorded and mother's memory-demand questions were coded for form and content from these conversations. Question form referred to whether recall or recognition was required and question content to the type of information requested--event or knowledge. Children also participated in 2 long-term memory tasks--production and verification. They were shown a dollhouse and asked to produce the names of objects that would belong in 2 rooms of the house and to verify whether particular miniature replicas of household objects belonged in the rooms. Although memory demands were frequently made, there were few changes between age 2 and 3 in the incidence or types of questions children were asked. At age 3, positive correlations were found between children's production and verification performance and content rather than form of mothers' memory-demand questions. At age 2 no overall relationships were found. Children were retested a year later on memory tasks, and for both age groups memory demands and performance were positively correlated even when initial memory-performance level was controlled. These results, along with other patterns in the data, suggested that mothers' memory demands have an impact on children's memory performance that provides at least partial support for Vygotsky's sociohistorical model of memory development. 相似文献
7.
Junko Yamashita 《Journal of Research in Reading》2002,25(1):81-95
The present study investigates the contribution of first language (L1) reading ability and second or foreign language (L2) proficiency to L2 reading comprehension, by focusing on the compensation between L1 reading ability and L2 proficiency. Two research questions were addressed: (1) does high L1 reading ability compensate for low L2 language proficiency? (2) does high L2 language proficiency compensate for low L1 reading ability? Participants were 241 Japanese university students learning English as a foreign language. They were divided into three levels (high, middle, low) according to the levels of their L1 reading ability and L2 language proficiency. Effects of these two factors on L2 reading ability were analysed by analysis of variance. A multiple regression analysis to estimate a compensation model was also applied. Results provided positive answers to both research questions. The present study thus demonstrates the mutual compensation between L1 reading ability and L2 proficiency, which works in order to achieve the highest possible level of L2 reading comprehension for readers with different ability backgrounds in L1 reading and L2 proficiency. 相似文献
8.
Second language (L2) reading research suggests that there is a complex interplay between L2 proficiency, first language (L1) reading and L2 reading. However, not much is known about the effect of L1 proficiency on L1 reading, and of L1 reading on L2 reading, or vice versa, in bilingual settings when readers have few opportunities for extensive reading in their L1. The relationships between L1 (Northern Sotho) and L2 (English) proficiency and L1 and L2 reading were examined in Grade 7 learners attending a high‐poverty primary school in South Africa, during the course of a year when a reading intervention programme was implemented. The effect that attention to reading and accessibility of books had on the learners' reading proficiency in both languages was examined, and the factors that predicted academic performance were analysed. When the learners were engaged in more reading, L2 reading contributed more variance to L1 reading than L1 proficiency. Reading in both languages also contributed significantly to academic performance. The study highlights the need for more cross‐linguistic reading research in different educational settings. 相似文献
9.
Rats were presented with 2, 4, 6, 8, or 10 spatial locations on a 12-arm radial maze and on a subsequent test were required to choose between a place previously visited and a novel place. The animals were reinforced for entering the novel spatial location. During learning, animals showed an increase in errors as the number of places to be remembered increased from 2 to 8, indicating the use of a retrospective memory code. These animals also showed a decrease in errors as the number of places to remember increased from 8 to 10, indicating the use of a prospective memory code. In an analogous mnemonic task, college students were presented with 2, 4, 6, 8, 10, 12, or 14 Xs, shown one at a time, marked on a grid of 16 squares. On a subsequent test, the college students were asked to choose between a novel X and one that had appeared previously. Subjects were asked to circle the novel X. On the basis of their verbal reports, the subjects were divided into two groups reflecting different memory coding strategies. The subjects who reported a retrospective coding strategy showed an increase in errors as the list length increased. The subjects who reported a retrospective and prospective strategy showed an initial increase in errors for list lengths of 2 to 8 items followed by a decrease in errors for list lengths of 8 to 14 items. The results are interpreted to reflect a correspondence between animals and humans in the use of coding strategies aimed at facilitating memory performance for long lists of information. 相似文献
10.
We used a familiarization-novelty procedure to determine whether 4 infant chimpanzees spontaneously perceive the sameness of and the difference between both concrete objects and relations between objects. In Experiment 1, a single object was presented on the Familiarization Trial 1 and the animal's looking time recorded. On the Test Trial 2, an object was presented that was either identical to or different from that shown on Trial 1. Looking times on Test Trial 2 were less when the same item had been presented on the preceding familiarization trial. Novel items on Trial 2 were attended to longer, indicating that the infant chimpanzees perceived concrete objects were either the same or different. In Experiment 2, a single pair of objects was presented on the Familiarization Trial 1, and handling time was measured. The objects in a pair were either the same or different (e.g., AA vs. CD). On the Test Trial 2, a new object pair (e.g., BB vs. EF) was presented that instantiated either the relation shown on Trial 1 or the alternative relation. Handling time on Trial 2 was influenced by the relation instantiated on Trial 1. Handling times on Test Trial 2 were less when the identical relation had been presented on the preceding familiarization trial. Novel relations on Trial 2 were attended to relatively longer. This result indicates that infant chimpanzees perceive similarities and differences between abstract relations as well as between concrete objects. That is to say, they perceived relations between relations in Experiment 2. Despite this ability to perceive both concrete and abstract "same/different" relations, the same chimpanzees subsequently failed to use the latter knowledge in a matching-to-sample task in Experiment 3. Although they successfully matched single objects, they were unable to match object pairs instantiating the same relation (e.g., if AA then match BB; if CD then match EF). These results contradict claims that failure to learn an instrumental discrimination involving abstract relations reflects an inability to detect such relations. In every species there may be a disparity between the ability to perceive spontaneously a property of the world and the ability to use the concept instrumentally. 相似文献
11.
The claim that preadolescent children fail to differentiate between hypothetical beliefs and evidence is investigated in 2 studies. First-and second-grade children were presented with 2 conflicting hypotheses and asked to choose an empirical test to decide between them. In Study 1, the majority of first graders and almost all second graders correctly chose a conclusive test. They elaborated the logic of such a test and distinguished it from an inconclusive test. There was no evidence that children of this age misinterpret the task of hypothesis testing as one of generating a desirable effect. Study 2 replicated and extended these findings; in a task that posed a genuine scientific problem, first and second graders spontaneously generated empirical procedures for gathering indirect evidence to decide between alternative hypotheses. Our results indicate that young elementary school children distinguish between the notions of "hypothetical belief" and "evidence." These findings are discussed in light of their failure on other scientific thinking tasks. 相似文献
12.
Kyung Ja Kim 《Reading and writing》2011,24(8):861-881
This study was designed to identify underlying factors that motivate language learners to read in a foreign language (L2) context. It also examined the relationships between L1 and L2 reading motivation and any differences in reading motivation based on the learners?? academic majors and L2 reading proficiency. 259 Korean EFL college students participated in this study. Participants?? L1 and L2 reading motivation was measured using a Likert scale questionnaire and their L2 proficiency was estimated by test scores in their reading classes. This study yielded a four-factor solution for L2 reading motivation: learning goal-oriented motivation, intrinsic motivation, avoidance of reading, and utility value of L2 reading. The results indicated that learning goal-oriented motivation and utility value of L2 reading were the two primary indicators for the participants?? desire to read in English. The study also demonstrated that the factor-based L2 reading motivation scales correlated with some of the L1 reading motivation scales in the relatively low range but statements about the connection or transfer issue of reading motivation between the two languages must be tentative. All L2 reading motivation scales revealed significant differences between English and non-English majors except in utility value of L2 reading. Furthermore intrinsic and avoidance scales also differed significantly depending on the participants?? L2 reading proficiency. 相似文献
13.
本研究采用自编的《初中生自主性发展自陈问卷》,对257名初中生的自主性从三个维度进行研究,结果表明:(1)初中生自主性发展具有独特的年级特点。在自主性发展水平上,初一与初二、初三学生之间存在显著的年级差异,并且初一水平好于初二、初三;初二与初三学生之间不存在显著的年级差异。初二是自主性发展水平下降最为明显的阶段。到了初三,除自我控制维度继续呈下降趋势外,其余维度及总体发展水平不再下降。(2)初中生在自主性的总体发展水平及自我依靠和自我主张两个维度上均不存在显著的性别差异,但在自我控制维度上存在显著的性别差异,并且女生水平好于男生。初一学生在自我控制维度上、初二学生在总体发展水平上存在显著性别差异,而且均表现为女生水平好于男生。初三学生中不存在显著的性别差异。 相似文献
14.
Dawson R. Hancock Claudia P. Flowers 《Educational technology research and development : ETR & D》2001,49(1):5-13
Social desirability responding (SRD) on surveys administered on the World Wide Web (WWW) and on paper was examined using 178
graduate and undergraduate students randomly assigned to a 2 (World Wide Web and Paper) ×2 (Anonymous and Nonanonymous) true
experimental design. The findings reveal no differences in SDR between the WWW and the paper-administered survey conditions,
and no differences in SDR between the anonymous and nonanonymous conditions. These findings and potential explanations are
examined for consideration by anyone interested in using the WWW to obtain accurate information from survey participants. 相似文献
15.
This study examined the nature of the relationship between phonemic awareness and reading and spelling development and focused particularlyon the development of early self-directed writing. The spontaneous writing attempts of 44 first-graders were followed on 6 test occasions from the start of grade 1 (7 years) until the middle of grade 2. The children were divided into 2 groups, one group (N = 21) with a high level of phonemic awareness on entry into grade 1 (HPA) and one group (N = 23) with a low level on entry (LPA). The connection between level of inventedspelling used in the self-directed writing and later reading andspelling achievement in grades 1 and 2 was investigated. The results showed remarkable differences between the two groups. Level of invented spelling at Time 1 was highly predictive of both reading and spelling achievement at the end of grades 1 and 2, but only for the HPA group. With Time of Mastery regarding phonemic spelling as the independent variable and reading and spelling at the end of grade 2 as the dependent variable, regressions analysis indicated strong direct effects of early phonemic spelling upon later reading and spelling development, but only for the LPA children. The two groups showed different patterns of development in learning to read and spell during grades 1 and 2. 相似文献
16.
Annie Fisher 《Curriculum Journal》2013,24(3):227-238
This work has a particular focus on exposing important connections between trainee teachers' personal beliefs about knowledge (epistemological beliefs) and their conceptions of learning. These, the authors argue, are central to the assumptions which underpin their pedagogy when working with children in school. The link between these constructs emerged as key issues during a collaborative research project between five practitioners across two universities which explored the use of a ‘learning to learn’ (L2L) approach with a particular emphasis on postgraduate ITT courses. This seems particularly pertinent to expanding the capacity to learn of trainees, yet, to date, it has received little attention within research on L2L, given its more immediate focus within the school setting. The authors believe, however, that the climate is now ripe for research focusing on the context of lifelong learning, in particular teacher trainee learning in ITT. They argue that a focus on the role of epistemology in helping to shape teaching approaches is likely to be a key element in developing students with a capacity to reflect critically on practice. 相似文献
17.
The purpose of the present study was to measure the degree of interdependence in timing (a) between infants' right and left arm movements, and (b) between movements of both arms and the onsets of stressed vowels in tape-recorded infant-appropriate speech. Based on previous work concerning closely related phenomena, we hypothesized that both forms of interdependence should be present to a high degree, even very early in infancy. Movements of 2 male and 4 female infants were analyzed at 2 and 10 weeks of age. Videotaping was conducted under 3 conditions: (a) quiet, (b) mother-infant interaction, and (c) presentation of a repeating tape loop containing natural sounding, infant-appropriate speech. Movement events were analyzed using a method of computer-aided 3-dimensional cinematography. A computer algorithm located change-in-direction movement events based on the 3-D coordinates. Lag sequential analysis was used to test for temporal interdependence. No evidence was found for interdependence between right and left arm movements, or between speech events and arm movements. The present findings have important implications for our understanding of early coordination and the regulation of mother-infant interaction. The utility of the movement-scoring methodology is also discussed in terms of its potential application to the study of early coordination development. 相似文献
18.
A kind of image distortion in Optical Coherence Tomography (OCT) resulted from average refractive index changes between structures of bio-tissue is discussed for the first time. Analysis is given on following situations:1) Exact refraction index changes between mierostruetures;2)The gradient of average refractive index change between different tissue layers is parallel to the probe beam;3) The gradient of average refractive index change is vertical to the probe beam. The results show that the image distortion of situation 1) is usually negligible ;in situation 2) there is a spread or shrink effect without relative location error; however, in situation 3)there is a significant image error inducing relative location displacement between different structures. Preliminary design to eliminate the distortion is presented, the method of which mainly based on the image classification and pixel array re-arrangement. 相似文献
19.
Ghislaine Gueudet Birgit Pepin Angela Restrepo Hussein Sabra Luc Trouche 《International Journal of Science and Mathematics Education》2018,16(3):539-558
This paper is concerned with the development of e-textbooks. We claim that analysis (and design) of e-textbooks requires the development of a specific frame. Digital affordances provide particular opportunities (e.g. in terms of interactions between users) that require specific considerations for their analysis, as teachers and students use them for their individual and collective purposes. In this study, we develop a framework for mathematics e-textbook analysis, based on the notion of “connectivity.” We introduce criteria to assess the different aspects of connectivity and build an analysis grid for e-textbooks. We illustrate the framework proposed by analyzing 2 commonly used French grade 10 mathematics e-textbooks. The results of the analyses show that there are major differences between the 2 e-textbooks in terms of connectivity, which can be related to differences in their design. Beyond these 2 examples, we claim that focusing on connectivity is a useful and relevant way of analyzing e-textbooks, as it can provide a window into issues of interactivity, both practically and cognitively. 相似文献
20.
Thermodynamic assessment in the ternary systems ZrO2 -CeO2 -Y2 O3, ZrO2 -CeO2 -Ce2 03 and the limiting binaries ZrO2 -Y2 O3, ZrO2 -CeO2, CeO2 -Y2 03, ZrO2 -Ce2O3, CeO2 -Ce2O3 as well as the modeling for oxides are reviewed comprehensively. Based on the recent estimations on the YO1.5-CeO2, ZrO2-CeO2 and ZrO2 -YO1.6 systems, isothermal sections at 1273 and 1 973 K of the ternary CeO2- ZrO2-YO1.5system are calculated. In the system of ZrO2-CeO2-Ce2O3, the complex relation between the nonstoichiometry （y） in CeO2-x, the composition of the ZrO2 -CeO2 solid solution and the oxygen partial pressure （Po2 ） for different ZrO2 containing solid solutions CexZr1-xO2-x. are evaluated from 1 473 to 1 773 K. The relation between the degree of Ce^＋4 reduction to Ce.3 under different Po2 in the fluorite CeO2-xy and CexZr1-xOz-x solid solutions at different temperatures can be used as a guide in the development of functional ceramics. 相似文献