共查询到20条相似文献，搜索用时 261 毫秒
1.
The Influence of Shape Similarity and Shared Labels on Infants'' Inductive Inferences about Nonobvious Object Properties 总被引：4，自引：0，他引：4
This study examined the influence of object labels and shape similarity on 16- to 21-month-old infants' inductive inferences. In three experiments, a total of 144 infants were presented with novel target objects with or without a nonobvious property, followed by test objects that varied in shape similarity to the target. When objects were not labeled, infants generalized the nonobvious property to test objects that were highly similar in shape (Experiment 1). When objects were labeled with novel nouns, infants relied both on shape similarity and shared labels to generalize properties (Experiment 2). Finally, when objects were labeled with familiar nouns, infants generalized the properties to those objects that shared the same label, regardless of shape similarity (Experiment 3). The results of these experiments delineate the role of perceptual similarity and conceptual information in guiding infants' inductive inferences. 相似文献
2.
How Much Does a Shared Name Make Things Similar? Linguistic Labels, Similarity, and the Development of Inductive Inference 总被引：6，自引：0，他引：6
This article examines the development of inductive generalization, and presents a model of young children's induction and two experiments testing the model. The model specifies contribution of linguistic labels and perceptual similarity to young children's induction and predicts a correspondence between similarity judgment and induction of young children. In Experiment 1, 4- to 5-year-olds, 7- to 8-year-olds, and 11- to 12-year-olds were presented with triads of schematic faces (a Target and two Test stimuli), which varied in perceptual similarity, with one of the Test stimuli sharing a linguistic label with the Target, and another having a different label. Participants were taught an unobservable biological property about the Target and asked to generalize the property to one of the Test stimuli. Although 4- to 5-year-olds' proportions of label-based inductive generalizations varied with the degree of perceptual similarity among the compared stimuli, 11- to 12-year-olds relied exclusively on labels, and 7- to 8-year-olds appeared to be a transitional group. In Experiment 2 these findings were replicated using naturalistic stimuli (i.e., photographs of animals), with perceptual similarity manipulated by "morphing" naturalistic pictures into each other in a fixed number of steps. Overall results support predictions of the model and point to a developmental shift from treating linguistic labels as an attribute contributing to similarity to treating them as markers of a common category-a shift that appears to occur between 8 and 11 years of age. 相似文献
3.
再论智力障碍概念的演化及其实践意义 总被引：2，自引：0，他引：2
20年来智力障碍定义发生了重要的演变。第一次转变是从1983年的定义系统转变为1992年的定义系统,这次转变是将智力障碍从一个人的固有特性转变为一个人能力与环境相互作用的功能状态;并提出了按支持程度分类的新系统;第二次转变是在第一次转变基础上继续强调从5个维度来为智力障碍者提供支持,提供个人功能状态,最终提高他们的生活质量。智力障碍定义的演化改变了人们智力障碍的观念,对智力障碍的分类系统、教育和成人康复实践产生了重要影响。 相似文献
4.
Evidence for knowledge-based category discrimination in infancy 总被引：2，自引：0，他引：2
Pauen S 《Child development》2002,73(4):1016-1033
Two studies examined whether infants' category discrimination in an object-examination task was based solely on an ad hoc analysis of perceptual similarities among the experimental stimuli. In Experiment 1A, 11-month-olds examined four different exemplars of one superordinate category (animals or furniture) twice, followed by a new exemplar of the familiar category and an exemplar of the contrasting category. Group A (N = 39) explored natural-looking toy replicas with low between-category similarity, whereas group B (N = 40) explored artificial-looking toy models with high between-category similarity. Experiment 1B (N = 40) tested a group of 10-month-olds with the same design. Experiment 1C (N = 20) reversed the order of test trials. For Experiment 2 (N = 20), the same artificial-looking toy animals as in Experiment 1 (group B) were used for familiarization), but no category change was introduced at the end of the session. Infants' responses varied systematically only with the presence of a category change, and not with the degree of between-category similarity. This supports the hypothesis that performance was knowledge based. 相似文献
5.
4 experiments investigated the development of children's ability to recognize perceptual relational commonalities such as symmetry or monotonicity. In Experiment 1, 6- and 8-year-olds were able to recognize higher-order relational similarity across different dimensions (e.g., size/saturation ) and across different polarities (e.g., increase/decrease ), whereas 4-year-olds could recognize higher-order relational matches only when they were supported by lower-order commonalities (e.g., size/size but not size/saturation matches). Further experiments tested how the processes of comparison and categorization affected 4-year-olds' ability to recognize relational similarity. The results of the experiments supported the hypothesis that comparison and categorization processes lead to changes in children's representations of relational structure, enabling them to recognize more abstract commonalities. A computational model lent further support to the claims. 相似文献
6.
美国智力与发展性障碍协会于2010年公布了新版定义,以"智力障碍"代替了之前所使用的术语"智力落后".新定义提出了具备诊断、分类和计划与发展支持系统三重功能的评估框架、多维度取向的分类系统以及终身性的、全面的支持系统.本文梳理了20世纪90年代以来智力障碍定义的演变进程,重点评析了1992、2002、2010年的三版定义,并分析了智力障碍定义演变的特点与趋势及其对我国特殊教育发展的启示. 相似文献
7.
Martina A. Rau 《Instructional Science》2018,46(2):209-243
To learn content knowledge in science, technology, engineering, and math domains, students need to make connections among visual representations. This article considers two kinds of connection-making skills: (1) sense-making skills that allow students to verbally explain mappings among representations and (2) perceptual fluency in connection making that allows students to fast and effortlessly use perceptual features to make connections among representations. These different connection-making skills are acquired via different types of learning processes. Therefore, they require different types of instructional support: sense-making activities and fluency-building activities. Because separate lines of research have focused either on sense-making skills or on perceptual fluency, we know little about how these connection-making skills interact when students learn domain knowledge. This article describes two experiments that address this question in the context of undergraduate chemistry learning. In Experiment 1, 95 students were randomly assigned to four conditions that varied whether or not students received sense-making activities and fluency-building activities. In Experiment 2, 101 students were randomly assigned to five conditions that varied whether or not and in which sequence students received sense-making and fluency-building activities. Results show advantages for sense-making and fluency-building activities compared to the control condition only for students with high prior chemistry knowledge. These findings provide new insights into potential boundary conditions for the effectiveness of different types of instructional activities that support students in making connections among multiple visual representations. 相似文献
8.
Students' perceptions of teaching skills and overall effectiveness across instructional settings 总被引：1，自引：1，他引：1
This study examines the differences in students' perceptions of the amount of improvement in dimensions of teaching skills across levels of instruction, class sizes, and disciplines. The relationship between factor scores on the dimensions of teaching and students' overall ratings are also analyzed across instructional settings.Student ratings were collected in 2,816 classes in a Faculty of Commerce over three semesters. Using class means as a unit of analysis, the data were factor-analyzed. Factor scores were used as dependent variables in examining differences across course characteristics. Factor scores were further used to predict ratings of the overall quality of instruction. These predictions were subsequently compared across instructional settings.In the combined sample, differences in students' perceptions were found across levels of instruction for all factors, and across class size for two factors. When analyses were conducted on these variables within separate disciplines, the results varied. The relationship between factor scores on the dimensions of teaching and students' overall ratings varied across instructional settings.The results are discussed in relation to previous research on the dimensions of teaching and in relation to the concept of students' normative assumptions about teaching behavior. Some practical implications of the results are also described. 相似文献
9.
Perceptual and categorical similarity were varied independently in a concept-matching task administered to 26-month-old children (N = 25). 44 test sets were assembled. Each set included a 3-dimensional standard and an array of 4 pictures, one of which was a member of the same basic or superordinate category as the standard. On each trial, placing the standard on the matching picture resulted in activation of 1 of 12 mechanical displays. The test sets varied in the perceptual and categorical resemblance of the standard to the match and to the nonmatches, as determined by adults' ratings. Perceptual similarity proved to be the primary determinant of difficulty level. When perceptual resemblance of the standard and the match were equated, superordinate and basic matches were equally difficult. When perceptual resemblance was minimal, most children were unable to recognize matches at either the basic or superordinate level. 相似文献
10.
Thirteen-month-olds rely on shared labels and shape similarity for inductive inferences 总被引：4，自引：0，他引：4
This study examined the influence of shape similarity and labels on 13-month-olds' inductive inferences. In 3 experiments, 123 infants were presented with novel target objects with or without a nonvisible property, followed by test objects that varied in shape similarity. When objects were not labeled, infants generalized the nonvisible property to high-similarity objects (Experiment 1). When objects were labeled with the same noun, infants generalized the nonvisible property to high- and low-similarity objects (Experiment 2). Finally, when objects were labeled with different nouns, infants generalized the nonvisible property to high-similarity objects (Experiment 3). Thus, infants who are beginning to acquire productive language rely on shared shape similarity and shared names to guide their inductive inferences. 相似文献
11.
The influence of dimensional organization on pigeon texture perception was examined in a simultaneous conditional discrimination procedure. Six experienced pigeons were reinforced for pecking at a small block oftarget elements randomly located within a larger array ofdistractor elements in each texture stimulus. Target/distractor differences in color, size, orientation, and combinations of these dimensions were examined. In Experiment 1, the influence of target/distractor similarity on performance was investigated by using different forms of unidimensional and conjunctively organized texture stimuli made of two and three dimensions. Targets infeature displays, in which the two regions consistently differed along a single dimension, were located more accurately than targets inconjunctive displays, where a combination of values from all dimensions defined each region. In Experiment 2, a tradeoff between response speed and accuracy was found in the pigeons’ processing of conjunctive displays. In Experiment 3, the number of distractors differentially influenced the localization of feature and conjunctive targets. Overall, the pigeons’ reactions to these feature and conjunctive stimuli paralleled those of humans, suggesting that functionally equivalent mechanisms may mediate the perceptual grouping, search, and discrimination of textured multidimensional stimuli in both species. 相似文献
12.
《Peabody Journal of Education》2013,88(2):23-39
Theoretical and empirical efforts to develop valid methods by which to identify people with mental retardation and related disabilities have been underway for approximately 100 years. Recently, there is a growing consensus that mental retardation is best conceptualized as significant limitations in the multidimensional construct of personal competence. In addition to physical competence, personal competence is conceptualized to include, at the broadest level of conceptualization, the domains of conceptual, practical, and social intelligence. Due to limitations in personal competence, the defining characteristic of persons with mental retardation is an ongoing need for types and intensities of support that most others in society do not require. Current models of personal competence are described and the types of measurement tools available to measure essential dimensions of personal competence are discussed. Additionally, a systematic approach is described for assessing support needs and developing plans to meet these needs. 相似文献
13.
Rats were exposed to two compound solutions, saline-lemon and sucrose-lemon. In Group ALT, trials with one solution alternated
with trials with the other. Group BLK received all trials with one solution before any trials with the other. Previous retardation
tests had implied that only alternating exposure would establish sucrose as an inhibitor of saline. To provide a complementary
summation test for this inhibition, in Experiment 1, all the animals received pairings of peppermint and saline and were tested
for consumption of peppermint-sucrose under sodium depletion. Consumption was increased by sodium depletion only in Group
BLK. In Experiment 2, a retardation test was used to show that presentation of saline-lemon before sucrose-lemon on each exposure
day would establish sucrose as an inhibitor of saline. Neither exposure to sucrose-lemon before saline-lemon nor alternating
exposure to sucrose and saline alone had the same effect. These results provide support for an associative theory of perceptual
learning that suggests that exposure to complex stimuli aids later discrimination partially as a result of establishing inhibitory
associations between their unique elements. 相似文献
14.
Blough DS 《Learning & behavior》2004,32(2):157-172
In three experiments with pigeons, the similarity of unreinforced test stimuli to a reinforced stimulus and the frequency
of reinforcement associated with a stimulus were varied. The stimulus on each trial was a small spot that appeared in different
hues or, in Experiment 3, different forms. Differential response frequency and reaction time (RT) patterns emerged: Changes
in similarity affected the percentage of stimuli responded to but left the shape of RT distributions about the same, whereas
changes in reinforcement shifted RT distributions but had little effect on the percentage of responses. When the similarity
and reinforcement variables were applied to the same stimuli (Experiment 2), their effects were largely independent. A generalization
procedure (Experiment 3) replicated the similarity effects of the initial discrimination procedure. The RT distributions were
modeled by a diffusion process, and implications for a memory-instance model were suggested. 相似文献
15.
The present research investigated the effects of physical context change and perceptual learning on generalization. In a video game, participants learned to suppress their mouse-clicking behavior in the presence of one stimulus (AX). Generalization was observed between the AX stimulus and another stimulus (BX) that was designed to be similar. When testing was conducted in a context different from that in which AX was used in training, responding to AX was attenuated, and responding to BX was enhanced. That is, the generalization gradient flattened. The latter effect was only evident in groups for which generalization had been reduced through a preexposure manipulation believed to produce perceptual learning. Experiment 2 demonstrated that the increase in generalization observed in the first experiment was due to the context change between the preexposure and test rather than to a change between the conditioning and test contexts. Implications for flattening generalization gradients and mechanisms of perceptual learning are discussed. 相似文献
16.
"智力障碍"定义的新演化--以"功能"、"支持"与"生活质量"为导向的新趋势 总被引：6，自引：5，他引：6
本文从我国使用的智力障碍定义的来源 ,分析了从 1992年到 2 0 0 2年以来的智力障碍定义的演化过程 ,比较了美国智力障碍协会 (AAMR)智力障碍定义 1992系统与 2 0 0 2系统之间联系与区别 ,认为 1992年以来的 10年关于智力障碍的定义演变过程中 ,智力障碍的定义的内涵中保持了一个值得注意的连续性 ,这就是“功能”、“支持”和“生活质量”三者之间的内在联系。本文通过阐述这三个概念以及关系 ,表达了 2 1世纪国际智力障碍特殊教育及相关服务中的一种值得注意的趋势 ,认为这种趋势也将对我国特殊教育走向产生重要影响 相似文献
17.
Michael E. Saladin William N. Ten Have Zalman L. Saper Jordan S. Labinsky Robert W. Tait 《Learning & behavior》1989,17(2):179-187
Retarded conditioned response (CR) acquisition produced by unconditioned stimulus (US) preexposures has been attributed either to interference resulting from contextual conditioning or to habituation of the US. Both perspectives assume that the amount of retardation is directly related to the number of US preexposures. This assumption was examined in two experiments. In Experiment 1, separate groups of rabbits received 200 paraorbital shock US preexposures either in one session or spread equally over 10 daily sessions. Subsequently, all subjects received 150 CS-US pairings. Acquisition of nictitating membrane CRs was retarded relative to a naive control group only in the group that received the preexposures over 10 sessions. Thus, the number of US preexposure sessions, rather than the number of US preexposures, determined whether or not retarded acquisition was observed. In Experiment 2, four groups of rabbits received 1, 5, 20, or 40 shock US preexposures in each of 10 sessions. Over the subsequent 150 CS-US pairings, similar levels of retarded CR acquisition were observed in groups that received 20 and 40 US preexposures per session, a weak retardation effect was observed with 5 preexposures per session, and no retardation was observed with 1 preexposure per session. Thus, Experiment 2 suggested that retarded CR development was not greatly influenced by increasing the number of US preexposures above some minimum threshold number of exposures per session. Implications for current theories were discussed. 相似文献
18.
文章从课堂三要素以及课堂适应的内涵出发,结合智力障碍学生的课堂实际,从教师评价角度编制了智力障碍学生课堂适应问卷。问卷包含课堂物理环境适应、课堂人际互动适应、课堂规则适应、课堂学习适应、对教师教学的适应5个维度共42个题项。经统计检验,问卷具有较好的信效度,符合心理测量学要求,可以有效测查智力障碍学生的课堂适应状况。 相似文献
19.
调研目的：了解彝族地区智力落后儿童社会适应行为、社会支持与生活质量的现状。方法：采用问卷调查法,在云南省、四川省彝族地区的两所特殊学校,整群抽取126名智力落后儿童。结果：彝族智力落后儿童的社会适应行为性别差异显著,女生显著高于男生（p〈0．01）;不同居住地的彝族智力落后儿童的社会适应行为差异显著（p〈0．05）;父母不同文化程度的智力落后儿童的社会适应水平差异显著（p〈0．05）;不同支持水平的彝族智力落后儿童的生活质量差异显著（p〈0．01）;支持利用、社会责任进入彝族智力落后儿童的生活质量模型（p〈0．01）。 相似文献
20.
本研究从国内两所特殊教育学校采集了133名年龄在7岁至17岁之间的弱智学生的智力和适应行为的测量数据,经过统计处理,结果发现:随着智力落后程度的加重,弱智学生在智力测验的各个分测验上的发展水平会显著地下降;平均水平较低;学生智力落后的程度越重,其适应行为的发展水平越低;弱智学生的智力与适应行为存在极其显著的相关;弱智学生的智力和适应行为的发展不存在显著的性别差异。建议培智学校的课程设置和课程标准的制定需要针对不同程度弱智学生的认知特点,以适应学生的能力差异,这也是培智学校课程研究必然的方向。 相似文献