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1.
The collateral behavior of pigeons under differential-reinforcement-of-low-rate (DRL) schedules was evaluated for its role in controlling DRL performance. Two of three pigeons engaged in high rates of collateral keypecking under schedules up to DRL 28 sec. Rate of collateral pecking was positively correlated with DRL efficiency. Topographical features of the collateral behavior were inconsistent with the notion that collateral behavior mediates DRL performance through response-produced stimuli. Rather, the collateral behavior appeared to interfere with the operant response, delaying it long enough to meet the DRL requirement. 相似文献
2.
Can a subtle linguistic cue that invokes the self motivate children to help? In two experiments, 3‐ to 6‐year‐old children (N = 149) were exposed to the idea of “being a helper” (noun condition) or “helping” (verb condition). Noun wording fosters the perception that a behavior reflects an identity—the kind of person one is. Both when children interacted with an adult who referenced “being a helper” or “helping” ( 2 ) and with a new adult ( 3 ), children in the noun condition helped significantly more across four tasks than children in the verb condition or a baseline control condition. The results demonstrate that children are motivated to pursue a positive identity. Moreover, this motivation can be leveraged to encourage prosocial behavior. 相似文献
3.
Lawrence M. Berger Sarah K. Bruch Elizabeth I. Johnson Sigrid James David Rubin 《Child development》2009,80(6):1856-1876
This study used data on 2,453 children aged 4–17 from the National Survey of Child and Adolescent Well‐Being and 5 analytic methods that adjust for selection factors to estimate the impact of out‐of‐home placement on children’s cognitive skills and behavior problems. Methods included ordinary least squares (OLS) regressions and residualized change, simple change, difference‐in‐difference, and fixed effects models. Models were estimated using the full sample and a matched sample generated by propensity scoring. Although results from the unmatched OLS and residualized change models suggested that out‐of‐home placement is associated with increased child behavior problems, estimates from models that more rigorously adjust for selection bias indicated that placement has little effect on children’s cognitive skills or behavior problems. 相似文献
4.
Classroom teachers are learning to employ the peer group to “shape up” dissidents. However, singling out a child may produce undesirable side effects such as emotional behavior, resentment, etc. Can the same result be obtained by rewarding the class for ignoring the target behavior of everyone in the room? Twelve subjects were selected from six middle school classes, two from each class. Each entire class was rewarded for increased ignoring of the target behavior (whispering): in the three P (pinpointed) classes, for ignoring the whispering of Designated (target) subjects; in the three D (diffusion) classes, for ignoring whispering by all class members. The results indicate that a peer group can decrease reinforcement of a disruptive behavior and thereby decelerate it in a singled-out child (Pinpointing Effect) or a behavior emitted by any child in class (Diffusion Effect) with equal effectiveness. However, patterns in the data suggest that peers ignored P-Designated subjects most, D subjects next most, and P-Undesignated subjects the least and that this pattern of ignoring was mirrored in the pattern of deceleration of the target behaviors in the three groups. These patterns suggest that the Pinpointing Effect may be stronger than the Diffusion Effect, but further study is needed. 相似文献
5.
The aim of this small–scale research project was to examine the literacy events children choose to engage in outside school. Two groups of Primary School children were involved in investigating the use of literacy in their lives, using disposable cameras to record literacy events and texts. The photographs and the discussion stimulated by them provided evidence that these children used literacy in richly diverse ways for purposes which they saw as meaningful. Although limited in size and scope, the study showed that uses of literacy presented by these children reflected community literacy practices (as identified by Barton & Hamilton, 1998). However, it was also clear that the children acted with considerable autonomy, motivation and creativity in making their use of literacy meaningful to them. This paper provides a report on the project and discusses the implications of these findings for the teaching of literacy in school. 相似文献
6.
Homing pigeons were reinforced for emitting a perching response according to differential-reinforcement-of-low-rate (DRL) schedules. The spacing requirement between successive perchings was progressively increased by 1-sec steps up to 70 sec and then abruptly decreased to 60, 40, and 20 sec. IRT/OP (interresponse time/opportunity) functions were maximal near the time of reinforcement. The coefficients of variation of the IRT distributions (ratio between the interquartile range and median IRT) fluctuated around .32, testifying for equivalent levels of adjustment throughout the critical IRT range. The ratio between reinforced and total IRTs ranged between .90 and .20. These data contrast with the performance of another group of pigeons reinforced for a treadle-pressing response according to DRL schedules (flatter IRT/OP functions, high coefficients of variation, and low efficiencies). Despite these differences in temporal regulation between perching and treadle-pressing DRL, response rates and reinforcement rates followed the same trend in both cases: they decreased as schedule value increased. The DRL perching results are similar to previous results obtained in the same species when perching duration was reinforced. 相似文献
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8.
Katie J. James Julie A. Albrecht Ruth E. Litchfield Christopher A. Weishaar 《Journal of Food Science Education》2013,12(3):48-55
Foodborne illnesses remain a common problem in the United States. Focus group results indicated that lack of knowledge and improper handling of leftovers were common among food preparers in families with young children. The USDA‐recommended storage time for leftovers was used to develop and conduct a food safety social marketing campaign, 4 Day Throw Away using both traditional and social media. A procedural model for developing a theory‐based nutrition education intervention and the Health Belief Model were used to design, implement, and evaluate this campaign. The #4 mascot made numerous public appearances (in person and TV) to convey the 4 Day Throw Away message; 10000 magnets were distributed; and 500 posters with tear‐off note card were posted in the traditional campaign. Magnets and note card directed recipients to a website (4984 visits) with food safety information about leftovers. The social media campaign included 4 YouTube videos (11759 views); a Facebook page (166 users with over 21240 post views); and 51 followers on Twitter. The use of multiple media channels increased awareness and intention to change health behaviors especially among parents of children 10 and younger. Both traditional and social media methods in the 4 Day Throw Away campaign reached the intended audience suggesting that interventions using a mix of media channels broaden the reach and potential for intended behavior change. 相似文献
9.
Do children believe that “everything happens for a reason?” That is, do children endorse purpose‐based, teleological explanations for significant life events, as they do for social behavior, artifacts, biological properties, and natural kinds? Across three experiments, 5‐ to 7‐year‐olds (N = 80), 8‐ to 10‐year‐olds (N = 72), and adults (N = 91) chose between teleological and nonteleological accounts of significant life events and judged how helpful those accounts were for understanding an event's cause. Five‐ to 7‐year‐olds favored teleological explanations, but this preference diminished with age. Five‐ to 7‐year‐olds and 8‐ to 10‐year‐olds also found teleological explanations more helpful than did adults. Perceiving purpose in life events may therefore have roots in childhood, potentially reflecting a more general sensitivity to purpose in the social and natural worlds. 相似文献
10.
Multivariate analyses were used to explore the interrelations between response measures used in a DRL-20 schedule. A principal components analysis revealed two major components which accounted for a majority of the variance in all measures. One component included responses, reinforcements, efficiency, and a decrease in short-latency interresponse times; it could be viewed as supporting the previous use of the construct inhibition in the interpretation of DRL results. The other component was primarily associated with increased responding in the first period in which reinforcement was available; it could be viewed as a measure of temporal discrimination. A discriminant function, with blocks of trials as the criterion, was used to obtain from IRT/OP data a single measure summarizing change in behavior as a function of experience. The discriminant function incorporated both of the above sources of variance. The findings indicate that currently used summary measures do not fully reflect changes that occur under the DRL schedule. 相似文献
11.
Paul Smeyers 《Educational theory》2010,60(3):271-284
Due to a number of radical changes in society, the role of parents in the upbringing of their children has been redefined. In this essay, Paul Smeyers argues that “risk” thinking, and the technologization that goes with it in the context of child rearing, naturally leads to the rights discourse, but that thinking about the relation between parents and children in terms of rights confronts one with a number of insurmountable problems. The concept of the “best interests of a child” that is often invoked is, to say the least, not at all clear. Smeyers contends that while the discourse of rights is clearly important and relevant insofar as the relation between parents and the state are discussed, it impoverishes our understanding of relations of family members when used as an all‐inclusive framework in that context. Therefore, he concludes that we must surpass the totalizing tendency of the transformation of the social realm into a system, of defining the relation between parents and children in technical terms, and of holding parents liable for their children's upbringing. 相似文献
12.
“American = English Speaker” Before “American = White”: The Development of Children's Reasoning About Nationality 
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下载免费PDF全文 Jasmine M. DeJesus Hyesung G. Hwang Jocelyn B. Dautel Katherine D. Kinzler 《Child development》2018,89(5):1752-1767
Adults implicitly judge people from certain social backgrounds as more “American” than others. This study tests the development of children's reasoning about nationality and social categories. Children across cultures (White and Korean American children in the United States, Korean children in South Korea) judged the nationality of individuals varying in race and language. Across cultures, 5‐ to 6‐year‐old children (N = 100) categorized English speakers as “American” and Korean speakers as “Korean” regardless of race, suggesting that young children prioritize language over race when thinking about nationality. Nine‐ and 10‐year‐olds (N = 181) attended to language and race and their nationality judgments varied across cultures. These results suggest that associations between nationality and social category membership emerge early in life and are shaped by cultural context. 相似文献
13.
This study demonstrated that encountering children ages 18-23 months whose performance is not scorable by standard methods for either the Stanford Binet Intelligence Test or the Bayley Scales of Infant Development mental scale is a relatively frequent occurrence. However, the results of this study bring into question Sternlicht's (1965) suggestion that an 18-month basal level on the Stanford-Binet may be assumed, given success by a child on only one item at the two-year level. The study indicates that a child must succeed on at least two, or more conservatively, four items at the two-year level on the Stanford-Binet in order to assume an 18-month basal level. 相似文献
14.
Janet Evans 《Literacy》2002,36(2):88-94
This paper investigates how the writing of some Year 6 children was influenced by exposure to the work of a contemporary author of children’s literature and through reading a variety of fairy stories, traditional tales, fables and nursery rhymes. Their growing awareness of the way in which story structures are constructed in particular genres resulted in some thought–provoking short stories which exhibited intertextual references linked to life experiences and to parts of other texts they had read. 相似文献
15.
Sue Smedley 《English in Education》1991,25(1):12-20
An important reminder that young children know how stories work, and are therefore able to use bibliographic and literary knowledge as they set about the task of learning to read books with maturity and competence. Sue Smedley shows four and five year olds working in intellectually demanding ways to recreate stories for themselves and argues that young children have a right to the kinds of books and stories which call for intelligent and imaginative responses. 相似文献
16.
This paper reports on research conducted as part of a project, the aim of which was to utilise outdoor and adventurous experiences to help schools address their 'if only' factor — that aspect of learning perceived to be key to raising standards, whether it be the acquisition of knowledge, skills or a change in attitudes to learning. The project involved nine schools and 671 children, all engaged in the “I Can!” project and the follow-up activities that took place at schools. The research was carried out with children, teachers and parents and consisted of a series of focus groups and analysis of children's work. Limitations inherent within the research opportunity prevent the confident attribution of causation. However, the study's findings do offer insight into an under-researched, yet potentially valuable educational experience. The findings suggest that outdoor and adventurous activities can impact upon children's learning in school by addressing their intellectual, affective and social development. 相似文献
17.
The effects of signaled reward were examined using DRL and DRH schedules of reinforcement. In each case, one group of rats received a brief cue between the reinforced response and the reward, and a second group received brief cues at random times. With the DRL schedule (Experiment 1), signaled reward decreased response rate, increased response efficiency (number of responses per reinforcer), and increased resistence to satiation relative to the control group. With the DRH schedule (Experiment 2), signaled reward increased response rate, efficiency, and resistance to satiation. These results refute an overshadowing explanation of the effects of signaled reward and suggest that food-correlated cues enhance learning of the reinforcement contingencies. 相似文献
18.
Brian Finch 《Literacy》2012,46(1):40-47
Many children view favourite feature films repeatedly at home and develop understandings of them. This article discusses findings from a study which focused on the understandings that 9‐ and 10‐year‐old children showed about character in Harry Potter and the Chamber of Secrets. These findings are reported in terms of a framework appropriate for responses to character in literature or in film. The children's home‐based engagement with characters provides evidence for teachers who are planning to extend understandings about character in their classrooms. The article shows that children's interpretative and structural engagement can build significant understandings and informed appreciation which are similar to those that teachers aim for. 相似文献
19.
John N. Constantino Nahid Hashemi Ellen Solis Tal Alon Sandra Haley Stephanie McClure Nita Nordlicht Michele A. Constantino Julie Elmen Vicki Kay Carlson 《Child abuse & neglect》2001,25(12)
Objective: Home visitation has been shown to be effective in reducing rates of child maltreatment and in enhancing psychosocial outcomes in children and their parents. Even when available, however, it is underutilized by parents in some urban settings. We tested a supplemental 10-session group intervention for its ability to increase active participation in home visitation, enhance the quality of caregiving behavior of parents, and improve social developmental outcome in children.Method: A randomized controlled design was utilized, involving two separate cohorts of parents of 3- to 18-month old infants, totaling 148 parent-child dyads. The intervention focused on practical experience in promoting parent-infant attachment relationships.Results: At 6 months follow-up, there was a substantial increase in the proportion of intervention group parents participating in home visitation, compared to parents in the control group (Fisher’s exact p = .008). Parents in the intervention group exhibited a trend for improvement in their capacity to appropriately interpret infants’ emotional cues (p = .08), independent of the effects of home visitation itself. Attrition in both the treatment and control groups was inversely associated with income and level of education.Conclusions: Group meetings may constitute an effective means of engaging stressed urban families in home visitation. 相似文献
20.
This study examined the construct validity of 1 measure of Type A behavior, the Matthews Youth Test for Health (MYTH), with preschool-age children. Convergent and discriminant validity evidence was obtained based on teacher ratings, intelligence test scores, and reaction time in a visual discrimination task. As predicted, Type A behavior was related to ratings of aggression and impatience, but not to intelligence. An experimental analysis was conducted of the conjoint effect of 2 situational variables, time constraint and incentive, on reaction time. Children classified as Type A or Type B on the basis of the MYTH participated in a visual discrimination task either with or without the presence of a time constraint and an incentive. As predicted, the reaction times of Type B children who worked without a time limit and an incentive were significantly longer than both groups of Type A children and the Type B children who worked with a time limit and an incentive. In summary, support was obtained for the construct validity of the MYTH when used with preschool-age children. 相似文献