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1.
Lessons from television: children's word learning when viewing 总被引：1，自引：0，他引：1
The study investigated if preschoolers can learn novel words when viewing television and if the learning is influenced by age or type of word. 61 preschoolers, ages 3 and 5, were assigned to either an experimental or control group. They viewed a 15-min television program, featuring 20 different novel words, 5 each in the 4 categories of object, action, attribute, and affective-state words. Comprehension was tested before and after viewing. The experimental group performed better than the controls for object, action, and attribute words. 5-year-olds were more accurate than 3-year-olds and gained relatively more from the experimental condition. The easiest words to learn were object and attribute words. The results are relevant for studies of media effects and accounts of preschoolers' "fast mapping" of new words. 相似文献
2.
Two studies investigated how preschool children's interpretations of novel words as names for parts of objects were affected by 3 kinds of information: (a) whole object familiarity, (b) whole part juxtaposition, and (c) syntactic information indicating possession. Study 1 tested 3- to 4-year-olds and found that although there was evidence that all information affected children's part-term interpretations to some extent, they were most systematic when provided with 2 or more kinds of information. Study 2 adapted the procedure for use with 2.5-year-olds and found the same general pattern of results. Variations across studies were found that may reflect changes in how different kinds of information affect word learning with development. 相似文献
3.
Learning words from knowledgeable versus ignorant speakers: links between preschoolers' theory of mind and semantic development 总被引：1，自引：0，他引：1
Two studies addressed whether children consider speakers' knowledge states when establishing initial word-referent links. In Study 1, forty-eight 3- and 4-year-olds were taught two novel words by a speaker who expressed either knowledge or ignorance about the words' referents. Children showed better word learning when the speaker was knowledgeable. In Study 2, forty-eight 3- and 4-year-olds were taught two novel words by a speaker who expressed uncertainty about their referents. Whether the uncertainty truly reflected ignorance, however, differed across conditions. In one condition, the speaker said he made the object himself and thus, he was knowledgeable. In the other condition, the speaker stated that the object was made by a friend and thus, expressed ignorance about it. Four-year-olds learned better in the speaker-made than in the friend-made condition; 3-year-olds, however, showed relatively poor learning in both conditions. These findings suggest that theory-of-mind developments impact word learning. 相似文献
4.
Studies on the Formation of Perceptually Based Basic-Level Categories in Young Infants 总被引：7，自引：1，他引：7
A series of experiments examined the abilities of 3- and 4-month-old infants to form categorical representations to exemplars of natural kinds–cats and horses. These experiments also permitted assessment of the relative exclusivity of these representations—the extent to which they exclude exemplars from contrasting basic-level categories from the same superordinate category. We found that categorical representations could be formed for horses that excluded cats, zebras, and giraffes, and for cats that excluded horses and tigers but not female lions. Lions were, however, excluded from the representations of cats in 6- and 7-month-old infants. Evidence was also obtained for 2 a priori preferences for members of one category over another. The discussion examined the roles of similarity between the exemplars of the contrasting categories and those of the tested category on estimates of exclusivity and of spontaneous preferences on the formation and exclusivity of categorical representations. 相似文献
5.
Three experiments examined how children's domain knowledge and observation of exemplars interact during concept acquisition and how exposure to novel exemplars causes revision of such knowledge. In Experiments 1 (N = 126) and 2 (N = 64), children aged 4 to 10 years were shown exemplars of fictitious animal categories that were either unrelated to, or consistent with, their prior knowledge in 25% or 75% of presented exemplars. In Experiment 3, children (N = 290) saw fictitious animal, artifact, or unfamiliar social categories that were either consistent or inconsistent with their prior knowledge in 20%, 40%, 60%, or 80% of exemplars. In the test, children made judgments about the likely co-occurence of features. In all experiments, prior knowledge and exemplar observation independently influenced children's categorization judgments. Utilization of prior knowledge was consistent across age and domain, but 10-year-olds were more sensitive to observed feature covariation. Training with larger categories increased the impact of observed feature covariation and decreased reliance on prior knowledge. 相似文献
6.
We examined the role of object kind familiarity (i.e., knowledge of a count noun for an object) on preschoolers' sensitivity to the relation between a novel word's form class (adjective or count noun) and its reference (to a material kind-property or to an object kind). We used a forced-choice match-to-target task, in which children learned a word for one object (e.g., a metal cup), and then chose between 2 other objects. One was from the same object kind but a different material kind (with different related properties, such as color and texture; e.g., a white plastic cup); the other was from a different object kind but the same material kind (with the same related properties; e.g., a metal spoon). In Experiment 1, children learned either a count noun (e.g., "This is a zav") or an adjective (e.g., "This is a zav one"). Within each form class, we crossed the familiarity of the referent object kind (familiar and unfamiliar) with the age of the children (2- and 4-year-olds). The principal finding was that in interpreting an adjective, 4-year-olds were more likely to choose the object sharing material kind with the target if the target was familiar than if it was unfamiliar. No such familiarity effect was evident among 2-year-olds. In Experiment 2, we employed a more unambiguously adjectival frame (e.g., "This is a very zav-ish one"), and replicated the results of Experiment 1. We interpret the results in terms of 2 proposed word learning biases: one that learners initially expect any word applied to an unfamiliar object to refer to a (basic-level) kind of object, and a second that learners prefer words to contrast in meaning. We consider several interpretations of the observed age difference. 相似文献
7.
Pamela Blewitt 《Child development》1994,65(5):1279-1298
2 categorization skills necessary for understanding hierarchies are the ability to form categories at different levels of generality and the ability to include the same objects into multiple categories. 2-year-olds appear to have the first skill, but some theoretical and empirical work suggests that the second may be a later acquisition. Yet, in 3 studies, 2- and 3-year-olds applied familiar basic level and superordinate labels to the same objects, even when reminded of basic labels before being tested with superordinates. They did not reserve superordinates for objects with unfamiliar basic level names (Study 2), and they were willing to apply superordinates to objects presented singly rather than in groups (Study 3). Thus, contrary to the implications of some previous work, 2- and 3-year-olds appear to have both of the categorization skills necessary for forming categorical hierarchies. 相似文献
8.
Recent research suggests that, although young children appreciate many different kinds of conceptual relations among objects, they focus specifically on taxonomic relations in the context of word learning. However, because the evidence for children's appreciation of this linkage between words and object categories has come primarily from children who have made substantial linguistic and conceptual advances, it offers limited information concerning the development of this linkage. In the experiments reported here, we employ a match-to-sample task to focus specifically on the development of an appreciation of the linkage between words (here, count nouns) and object categories in infants in the period just prior to and just subsequent to the naming explosion. The results demonstrate that, for 21-month-old infants, most of whom have recently entered the vocabulary explosion (Experiment 1), and for 16-month-old infants, most of whom have yet to commence the vocabulary explosion (Experiment 2), novel nouns focus attention on taxonomic relations among objects. This is important because it reveals a nascent appreciation of a linkage between words and object categories in infants who are at the very onset of language production. Results are interpreted within a developmental account of infants' emerging appreciation of a specific linkage between count nouns and object categories. 相似文献
9.
Children's perseverative appearance-reality errors are related to emerging language skills 总被引：1，自引：0，他引：1
Two experiments explored the communicative bases of preschoolers' object appearance-reality (AR) errors. In Experiment 1, 3-, 4-, and 5-year-olds (N = 36) completed the AR test (with high- and low-deceptive objects), a control test with the same discourse structure but nondeceptive stimuli, and stimulus naming and memory tests. AR performance correlated positively with control (discourse) and naming test performance. Object deceptiveness had little effect. In Experiment 2, 3- and 4-year-olds (N = 64) completed AR tests that experimentally varied question phrasing and use of exemplar objects. Children also completed memory, vocabulary, and control tests (of verbal perseveration). AR performance variance was predicted by a composite perseveration score from three non-AR tasks, vocabulary, and exemplars. The results indicate that the discourse structure of the AR test elicits a perseverative tendency that is mediated by children's verbal knowledge. 相似文献
10.
This study investigated gaze-following abilities as a prerequisite for word learning, in a population expected to manifest a wide range of social and communicative skills-children with a family history of autism. Fifty-three 3-year-olds with or without a family history of autism took part in a televised word-learning task. Using an eye-tracker to monitor children's gaze behavior, it was shown that the ability to follow gaze was necessary but not sufficient for successful word learning. Those children who had poor social and communicative skills followed gaze to the labeled object but did not then learn the associated word. These findings shed light on the conditions that lead to successful word learning in typical and atypical populations. 相似文献
11.
Young children were taught to name 12 single words, six in the presence of appropriate pictures (compound stimuli) and six in their absence (simple stimuli). There were two compound conditions: one in which the picture was a large line drawing above a small printed word (enhanced salience condition) and one in which it was a small line drawing below a large printed word (reduced salience condition); and two corresponding simple conditions of a large word alone (enhanced salience condition) and a small word alone (reduced salience condition). Each child experienced all four conditions with three different words in each condition in a series of randomly ordered learning and test trials, until each child achieved the criterion of three consecutive correct responses for each of the words in at least one of the conditions. Two experimental studies were completed with 16 children in each, and the percentage of correct responses was calculated for each presentation condition. Comparisons of the compound (picture) and simple (no‐picture) conditions showed that twice as many words were correctly recognised in the simple (no‐picture) conditions in both experiments. No reliable differences were detected between the different levels of salience, and it was concluded that prior association between the picture and the naming response to the picture ‘blocked’ the acquisition of a new association between the written word and the naming response to it. 相似文献
12.
Two experiments examined 3- and 4-year-old children's ability to map novel adjectives to object properties. Sixty-four children were introduced to a target (e.g., a bumpy object), and asked to choose between (1) a matching test object (e.g., a different bumpy object), and (2) a contrasting test object (e.g., a smooth object). Four-year-olds successfully extended novel adjectives from the target to the matching test object whether these objects were drawn from the same, or different, basic level categories. In contrast, 3-year-olds' extensions were more restricted. They successfully extended novel adjectives if the target and test objects were drawn from the same basic level category but failed to do so if the objects were drawn from different basic level categories (Experiment 1). However, if 3-year-olds (n = 20) were first permitted to extend a novel adjective to objects within the same basic level category, they were subsequently able to extend that novel adjective broadly to objects from different basic level categories (Experiment 2). Thus, basic level object categories serve as an initial foundation in the process of mapping novel adjectives to object properties. 相似文献
13.
2 studies investigated young children's understanding that as the retention interval increases, so do the chances that one will forget. In Study 1 (24 3-year-olds and 24 4-year-olds), 4-year-olds but not 3-year-olds understood that of 2 characters who simultaneously saw an object, the character who waited longer before attempting to find it would not remember where it was. In study 2 (24 3-year-olds and 24 4-year-olds), 4-year-olds but not 3-year-olds understood that of 2 objects seen by a character, the object that was seen a "long long time ago" would be forgotten and the object seen "a little while ago" would be remembered. The findings are discussed in relation to research on young children's understanding of the acquisition, retention, and retrieval of knowledge over time. 相似文献
14.
Recent research indicates that toddlers can monitor others' conversations, raising the possibility that they can acquire vocabulary in this way. Three studies examined 2-year-olds' (N = 88) ability to learn novel words when overhearing these words used by others. Children aged 2,6 were equally good at learning novel words-both object labels and action verbs-when they were overhearers as when they were directly addressed. For younger 2-year-olds (2,1), this was true for object labels, but the results were less clear for verbs. The findings demonstrate that 2-year-olds can acquire novel words from overheard speech, and highlight the active role played by toddlers in vocabulary acquisition. 相似文献
15.
Although recent research indicates that an increased sensitivity to visual appearances develops around 4 or 5 years of age, evidence from perceptual studies suggests that certain types of appearances, that is, projective size and shape, are not noticed or understood until at least 7. 4 experiments investigated preschool children's knowledge of the projective size--distance and projective shape--orientation relationships. In Experiment 1, 3- and 4-year-olds were asked whether an object should be moved farther or nearer in order to increase or decrease its apparent size. 4-year-olds performed significantly better than chance, but 3-year-olds did not. Experiment 2 showed that 3-year-olds are able to perceive projective size changes, indicating that although they do not fully understand the projective size-distance relationship, the necessary perceptual information is potentially available to them. In Experiment 3, 3- and 4-year-olds were asked to indicate how a circular object should be rotated to make it appear either circular or elliptical. Again, 4-year-olds performed significantly better than chance, but 3-year-olds did not. Again also, the results of Experiment 4 indicate that although 3-year-olds are not aware of the projective shape-orientation relationship, they are capable of attending to changes in projective shape. Thus, the constraints on children's knowledge of the projective size-distance and projective shape-orientation relationships seem to be at least partly cognitive rather than wholly perceptual. These results are interpreted as further evidence for the acquisition of level 2 percept knowledge during early childhood. 相似文献
16.
Joana Acha 《British journal of educational technology : journal of the Council for Educational Technology》2009,40(1):23-31
The present experiment investigated the effect of three different presentation modes in children's vocabulary learning with a self-guided multimedia programmes. Participants were 135 third and fourth grade children who read a short English language story presented by a computer programme. For 12 key (previously unknown) words in the story, children received verbal annotations (written translation), visual annotations (picture representing the word), or both. Recall of word translations was better for children who only received verbal annotations than for children who received simultaneously visual and verbal annotations or visual annotations only. Results support previous research about cognitive load in e-learning environments, and show that children's learning processes are hindered by limited working memory. This finding implies a challenge for multimedia programmes designed for children and based on self-regulated learning. 相似文献
17.
Dimensional adjectives are inherently relative in meaning, and so provide a test of children's ability to apply nonegocentric standards. The present research investigates children's ability to apply one kind of relative standard assessing the size of an object with regard to its intended use (a functional interpretation). In 3 experiments, children 3-5 years of age were asked to judge objects as "big" or "little" according to their function (e.g., a hat for a doll; a key for a door). Contrary to previous claims, the ability to use nonegocentric functional standards was present by age 3. However, 3-year-olds performed above chance only when their attention was directed to the relevant function, either by means of action (when actually shown how the objects fit together) or by means of language. In contrast, 4-year-olds performed well without additional action-based or linguistic cues. It is suggested that children have an implicit ordering in their interpretations of big and little, such that functional judgments are lower in priority than 2 other standards: normative (the size of an object is compared to a stored mental standard, e.g., a chihuahua is small for a dog) and perceptual (the size of an object is compared to another physically present object of the same type, e.g., a chihuahua 6 inches tall is big compared to a chihuahua 4 inches tall). Even 3-year-olds can make nonegocentric functional judgments of relative size, but the basis of the judgment must be unambiguous. 相似文献
18.
Acquiring Proper Nouns for Familiar and Unfamiliar Animate Objects: Two-Year-Olds' Word-learning Biases 总被引：1，自引：0，他引：1
D. Geoffrey Hall 《Child development》1991,62(5):1142-1154
In 2 studies, 2-year-old children learned a novel word modeled as a proper noun (e.g., "This is Zav") for an animate stuffed toy. Children who learned the word for a familiar object (i.e., one for which they knew a basic-level count noun for the kind) interpreted the word appropriately as a proper noun reliably more often than children who learned the word for an unfamiliar object (i.e., one for which they did not know such a count noun). When the creature was familiar, children typically interpreted the novel word as if it were a proper noun referring uniquely to the labeled individual. When the animal was unfamiliar, children frequently interpreted the word as if it were a count noun referring to a kind of object. Children's spontaneous comments during the tasks provided striking additional evidence that their interpretations of the proper noun varied with the familiarity of the object. The results suggest that young children's sensitivity to the form class of proper nouns is affected by the familiarity of the referent object. The findings are discussed in terms of interpretative biases in word learning. 相似文献
19.
Children tend to extend object names on the basis of sameness of shape, rather than size, color, or material-a tendency that has been dubbed the "shape bias." Is the shape bias the result of well-learned associations between words and objects? Or does it exist because of a general belief that shape is a good indicator of object category membership? The present three studies addressed this debate by exploring whether the shape bias is specific to naming. In Study 1, 3-year-olds showed the shape bias both when asked to extend a novel name and when asked to select an object of the same kind as a target object. Study 2 found the same shape bias when children were asked to generalize properties relevant to category membership. Study 3 replicated the findings from Study 1 with 2-year-olds. These findings suggest that the shape bias derives from children's beliefs about object kinds and is not the product of associative learning. 相似文献
20.
Young Children's Concept of Color and Its Relation to the Acquisition of Color Words 总被引：8，自引：0，他引：8
Nancy N. Soja 《Child development》1994,65(3):918-937
Many children experience great difficulty in learning their first color word. In contrast, once children have learned 1 color word, they learn additional color words more easily. This striking fact raises the question of whether children who do not know color words have conceptual color categories capable of supporting inferences about word meaning. In 3 experiments 2-year-olds were provided with tasks that required them to base inferences on color or to map things onto color. Half the children comprehended at least 1 color word, and the remaining children comprehended none. In all experiments, the children in both groups succeeded on the color tasks. It was argued that children who do not know color words have the conceptual foundation necessary to base inferences on color but have specific constraints against basing inferences about word meaning on color. 相似文献