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1.
When pre‐school children count an array of objects containing one that is broken in half, most count the halves as two separate objects. Two studies explore this predisposition to count discrete physical objects (DPOs) and investigate its robustness in the face of various manipulations. In Experiment 1, 32 children aged three–four years counted arrays of intact and broken objects, comprising familiar objects known to be separable (e.g. a lolly and its stick) or non‐separable (e.g. a toothbrush). The meaning of presenting a broken object was made explicit as some children saw a ‘naughty Ted’ causing the breakage. The DPO bias was robust in the face of these familiarity and context manipulations. Experiment 2 tested whether the DPO bias could be overcome by teaching children a strategy for counting two parts as one whole and also considered whether children’s prior knowledge of cardinality was associated with the bias. Only eight children (33%) benefited from the strategy teaching. At a second post‐test two to three days later, half of these had reverted to their DPO bias. Cardinality knowledge was not associated with improvement. The robustness of the bias to count DPOs is discussed in terms of innate predispositions and abstracted representations. 相似文献
2.
Kelly S. Mix Catherine M. Sandhofer Julie Anne Moore Christina Russell 《Early childhood research quarterly》2012
We investigated whether specific input helps 3-1/2-year-olds discover that the last word in a count represents its cardinal value (i.e., the cardinal word principle). In Study 1, we contrasted four training approaches. The only approach to yield significant improvement was to label a set's cardinality and then immediately count it. This training is consistent with previously hypothesized mechanisms based on juxtaposing a set's cardinal label with its count in close temporal contiguity (e.g., 0105 and 0175), as well as general theories of comparison and categorization (e.g., Gentner, 2005). In Study 2, we asked parents to read picture books to their preschool children and found that they rarely provide cardinal labels immediately followed by counting, even when asked to read a book about number. 相似文献
3.
In simultaneous matching-to-sample and oddity-from-sample tasks, briefly delaying the offset of trial stimuli following an incorrect choice response was found to facilitate task acquisition (Experiment 1). Because thispenalty-time procedure also resulted in longer choice-response latencies, it was hypothesized that any procedure that increased response latency would facilitate task acquisition. However, in Experiment 2, no evidence of facilitation was found when a 2-sec pause was imposed prior to the choice response. The results of Experiment 3 suggest that penalty-time facilitation of acquisition was not due to either the added differential outcome on correct versus incorrect trials (i.e., incorrect choice responses do not darken the keys as do correct choice responses) or the aversive effects associated with trial prolongation (i.e., incorrect responses not only result in the absence of reinforcement but also delay the start of the next trial). Instead, results suggest that birds trained with the penalty-time procedure review the trial stimuli following an incorrect choice. 相似文献
4.
Automatic processing of word meaning was studied in bilingual children and children in various stages of second-language acquisition in 2 experiments. A picture-word interference task was used. The children named outlined pictures as rapidly as possible while attempting to ignore distractor words printed inside the pictures' borders. For children proficient in the 2 languages (Experiment 1), the printed distractors interfered with naming on both intralingual trials, for which the distractor and naming language were the same, and on interlingual trials, for which they were different. The pattern of interference across 6 levels of name-distractor relation was similar for the intralingual and interlingual conditions and indicated that at least part of the interference occurred at a semantic level. For children who were in various phases of learning a second language (Experiment 2), second-language words were automatically processed to the level of meaning early in the course of second-language reading instruction. As was found for the more proficient groups, both the pattern and the amount of interlingual interference matched that for intralingual interference. The results question whether an "input switch" operates for bilingual word processing. 相似文献
5.
Josephine C. Jenkinson 《International Journal of Disability, Development & Education》1992,39(1):61-76
TWO EXPERIMENTS were designed to investigate possible deficiencies in strategies used for decoding words by children with an intellectual disability. The experiments focused specifically on the use of letter position cues as aids to word identification. In Experiment 1,20 children with an intellectual disability (ID) aged 10 to 12 years were matched with two groups of nondisabled children, one for mental age (MA) and one for chronological age (CA), on a visual search task, with response times to array types (word, pseudoword, or nonword) and target position in positive arrays as the dependent variable. The ID group showed response time advantages only when the target letter was in the initial position of an array; however both nondisabled groups responded faster when the target letter was in either the initial or final position, compared to the medial position, and this pattern occurred for words (MA group) and words and pseudowords (CA group) but not for nonwords. Experiment 2 extended the investigation to the oral reading of isolated words. In substitution errors made by children with an intellectual disability, the incorrect word tended to resemble the test word only in the initial letter. In errors made by MA‐matched children, however, both the initial and final letters tended to be the same as those in the test word, suggesting that these are salient cues to word recognition. The findings are interpreted with reference to previous work on early reading acquisition and to research which suggests a more generalised deficiency in the acquisition and use of strategies by ID subjects in cognitive tasks. 相似文献
6.
Within-session changes in responding during delayed matching-to-sample and discrimination procedures
Two experiments examined within-session changes in responding during discrimination procedures. In Experiment 1, rate of responding changed significantly within sessions during symbolic delayed matching-to-sample tasks when the delay between the stimulus and the choice period was short (1–5 sec), but not when it was long (8–12 sec). The percentage of responses that were correct did not change within sessions. In Experiment 2, response rates increased and then decreased within sessions during both S1 and S2 when successive discrimination procedures provided high, but not low, rates of reinforcement. Discrimination ratios sometimes increased within sessions. These results question two potential definitions of attention as explanations for within-session changes in response rates. They are more compatible with explanations based on concepts such as arousal, satiation, habituation, and interfering responses. 相似文献
7.
Two experiments were conducted to investigate developmental changes in children's use of rime-level units of sound-to-spelling correspondence when spelling nonwords under varying task demands. In Experiment 1, nonwords were presented in isolation. Older children spelled more of the nonwords by analogy than younger children. Experiment 2 adopted versions of the clue word technique employed by Goswami (1988a) and found that significantly more analogous, rime-based responses were given to the same stimuli in both younger and older children. However, fewer analogous responses were given when the salience of the clue word was reduced by presentation of multiple target nonwords. The results suggest that while children in the early stages of development possess the ability to use rime-based units in spelling, they do not always make spontaneous use of this analogy strategy. However, when the potential to use rime-based units is highlighted by task demands, as is the case in Experiment 2 when a clue word is provided, even young children make considerable use of analogy in spelling. 相似文献
8.
The effect of phonology and semantics on word learning in 5- and 6-year-old children was explored. In Experiment 1, children learned to read words varying in spelling-sound consistency and imageability. Consistency affected performance on early trials, whereas imageability affected performance on later trials. Individual differences among children in phonemic awareness on the trained words were related to learning, and knowledge of a word's meaning predicted how well it was learned. In Experiment 2, phonological and semantic knowledge of nonwords was manipulated prior to word learning. Familiarization with a word's pronunciation facilitated word learning, but there was no additional benefit from being taught to associate a meaning with a nonword. 相似文献
9.
Perception of gated, highly familiar spoken monosyllabic nouns by children with and without learning disabilities 总被引：1，自引：0，他引：1
L L Elliott M E Scholl J O Grant M A Hammer 《Journal of learning disabilities》1990,23(4):248-52, 259
A forward-gating procedure employing highly familiar monosyllabic words was used in auditory testing of age- and gender-matched children with learning disabilities and normally achieving children aged 8 to 11 years. The portion of the word presented, or "gate," was longer on each successive trial. Nondisabled children identified an average of one more word than the children with learning disabilities, but the mean duration required for word identification did not differ between groups. Better receptive vocabulary scores were associated with identification of words at shorter durations only among the children with learning disabilities. The two groups of children had similar numbers of different meaningful-word and different non-word incorrect responses. The children with learning disabilities exhibited poorer fine-grained auditory discrimination than a control group of nondisabled children. The study concluded that auditory closure skills for the gating task were as good among children with learning disabilities as among nondisabled children, but that sensory discrimination problems may contribute significantly to the learning difficulties of the former group. 相似文献
10.
2 experiments on the development of the understanding of random phenomena are reported. Of interest was whether children understand the characteristic uncertainty in the physical nature of random phenomena as well as the unpredictability of outcomes. Children were asked, for both a random and a determined phenomenon, whether they knew what its next outcome would be and why. In Experiment 1, 4-, 5-, and 7-year-olds correctly differentiated their responses to the question of outcome predictability; the 2 older groups also mentioned appropriate characteristics of the random mechanism in explaining why they did not know what its outcome would be. Although 3-year-olds did not differentiate the random and determined phenomena, neither did they treat both phenomena as predictable. This latter result is inconsistent with Piaget and Inhelder's characterization of an early stage of development. Experiment 2 was designed to control for the possibility that children in Experiment 1 learned how to respond on the basis of pretest experience with the 2 different phenomena. 5- and 7-year-olds performed at a comparable level to the same-aged children in Experiment 1. Results suggest an earlier understanding of random phenomena than previously has been reported and support results in the literature indicating an early understanding of causality. 相似文献
11.
The reading test performances of 60 hearing and 60 hearing-impaired children of similar measured reading ages on the Southgate reading test were analysed. As in an earlier study using the Brimer Wide-span test it was shown that the performances of the two groups were quite different. Deaf children tackled significantly more test items than the hearing and made significantly more errors in achieving similar reading scores. A detailed examination of both correct and incorrect answers showed that the deaf children were not simply providing answers to questions at random. Even where they produced incorrect responses they tended, as a group, to select the same answer. Unlike the hearing group, who did not converge on the same incorrect solution to difficult test items, the deaf were systematic in their choices, indicating that they were using a consistent strategy. A post hoc examination of individual test items indicated that the deaf children were selecting answers on the basis of word associations in each test item. On some items these produced a correct response, on others the same (incorrect) response. The implications of these findings are discussed to argue that reading tests based on hearing norms are of little value in the assessment of reading abilities and reading problems in hearing-impaired children. 相似文献
12.
J Becker 《Child development》1989,60(5):1147-1157
Preschoolers' use of number words to denote one-to-one correspondence was assessed by 2 tasks. In the matching task, the children matched 2 sets to determine whether they could be put in one-to-one correspondence and then judged whether the same number word should be used to denote both sets. In the counting task, the children counted 2 sets and used the final number words of the count to determine whether the sets could be put in one-to-one correspondence. Most 4-year-olds and some 3 1/2-year-olds use number words to denote one-to-one correspondence in each of these tasks. These findings are related to previous research. 相似文献
13.
Abstract Recent controversy over Piagetian tasks concerns whether the experimenter's actions result in children misunderstanding the question. Evidence for this has been derived from differences in performance of conservation tasks according to whether the transformation is intentional or accidental. Studies reporting large differences according to transformation type are claimed to be flawed procedurally. Including a preliminary talk and restricting questions to one domain result in little or no transformation type effect. Whether children's correct judgments in accidental versions are reliable indications of their knowledge has also been disputed. They may reflect children's ignoring of the transformation or covert counting. Using an identity conservation pretest 192 Yemeni children were selected to be tested on number conservation tasks varying in transformation type, numerosity and equality. The results were analysed using a model‐fitting procedure. Identity nonconservers were affected by transformation type but not numerosity whereas identity conservers showed the opposite pattern. The identity nonconservers may simply have been so bemused by the adult experimenter introducing a soft toy in the accidental conditions that they guessed. For identity nonconservers guessing will result in greater success than reasoning. 相似文献
14.
Reagan Curtis Yukari Okamoto Lisa Marie Weckbacher 《Early childhood research quarterly》2009,24(3):325-336
We examined preschool children's use of count information in making quantity judgments. Study 1 involved 35 children 3–5 years old using a balance-scale task to judge relative quantity with or without count information provided. Study 2 replicated and extended the exploration as 54 children 3–4 years old judged relative quantity in multiple counting contexts. Children who were given count information successfully used count information in quantity evaluation when visual cues were not useful. Limited experience of counting skills, strategy choice, and limited processing capacity are each discussed as potential explanations. Implications for early childhood practice and teacher education, as well as directions for future research are explored. 相似文献
15.
How is number‐concept acquisition related to overall language development? Experiments 1 and 2 measured number‐word knowledge and general vocabulary in a total of 59 children, ages 30–60 months. A strong correlation was found between number‐word knowledge and vocabulary, independent of the child’s age, contrary to previous results (D. Ansari et al., 2003). This result calls into question arguments that (a) the number‐concept creation process is scaffolded mainly by visuo‐spatial development and (b) that language only becomes integrated after the concepts are created (D. Ansari et al., 2003). Instead, this may suggest that having a larger nominal vocabulary helps children learn number words. Experiment 3 shows that the differences with previous results are likely due to changes in how the data were analyzed. 相似文献
16.
17.
Jean Ecalle Houria Bouchafa Anna Potocki Annie Magnan 《Journal of Research in Reading》2013,36(2):117-131
Two experiments were conducted to test the hypothesis that sentence processing is an essential mediatory skill between word recognition and text comprehension in reading. In Experiment 1, a semantic similarity judgement task was used with children from Grade 2 to Grade 9. They had to say whether two written sentences had the same (or very similar) meanings or whether the meanings of the two sentences were very different. As expected, performance improved with age both on the high‐frequency words and with increasingly complex sentences. In Experiment 2 with children in Grade 3, scores in written sentence comprehension and vocabulary made the most important unique contribution to the reading comprehension of an expository text. The results are discussed first, in the light of a general framework in which sentence‐level skill is at the core of reading comprehension and second, with reference to the issue of reading assessment. 相似文献
18.
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
19.
Previous efforts to measure the effectiveness of child abuse prevention programs have relied on proximate measures presumed to be predictive of actual skills. This paper presents documentation that brings those assumptions into question, describes actual observation and measurement of behavioral change in children before and after prevention education, and correlates that behavioral response with more traditional measures of effectiveness. Unique to the evaluation was the staging of an actual situation in which each of the children had an opportunity to leave the school building with a stranger. Each simulation was videotaped and conducted in such a way that the children remained unaware of the fact that they had been tested. In addition, tests of language development, self-esteem and knowledge of prevention and safety concepts were administered before and after participating in the Children Need to Know Personal Safety Training Program [1]. Several findings have significant value for future examinations and programming. The effectiveness of a primary prevention program based on age-appropriate, experiential and interactive instruction was empirically documented. Traditional instrumentation which elicits written or verbal responses to cognitive questions about safety may be misleading in assessing children's vulnerability. Higher self-esteem before instruction and higher knowledge/attitude scores after instruction were found to be predictive of a reduction in vulnerability. While this is a significant series of findings, some children did not achieve the objectives of the prevention program. These results suggest further possibilities for evaluation and some direction for improving prevention education. 相似文献
20.
Nancy C. JordanJanellen Huttenlocher Susan Cohen Levine 《Learning and individual differences》1994,6(4)
In two studies, we compared young children's performance on three variations of a nonverbally presented calculation task. The experimental tasks used the same nonverbal mode of presentation but were varied according to response type: (1) putting out disks (nonverbal production); (2) choosing the correct number of disks from a multiple-choice array (nonverbal recognition); and (3) giving a number word (verbal production). The verbal production task required children to map numerosities onto the conventional number system while the nonverbal production and nonverbal recognition tasks did not. Study 1 showed that the performance of 3-, 4- and 5-year-old middle-income children (N = 72) did not vary with the type of response required. Children's answers to nonverbally presented addition and subtraction problems were available in both verbal and nonverbal forms. In contrast. Study 2 showed that low-income children (3- and 4-year-olds; N = 48) performed significantly better on both nonverbal response type tasks than on the verbal response type task. Analysis of individual data indicated that a number of the low-income children were successful on the completely nonverbal calculation tasks, even though they had difficulty with verbal counting (i.e., set enumeration and cardinality). The findings suggest that the ability to calculate does not depend on mastery of conventional symbols of arithmetic. 相似文献