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141.
Smiling and Fussing in Seven-Month-Old Preterm and Full-Term Black Infants in the Still-Face Situation 总被引:2,自引:0,他引:2
Laura B. Segal Harriet Oster Morris Cohen Barbara Caspi Michael Myers David Brown 《Child development》1995,66(6):1829-1843
We investigated emotional responses to the still-face paradigm in 7-month-old preterm and full-term black infants. Baby FACS criteria were used to code the duration and intensity of infant smiles and the presence or absence of cry faces and fussy vocalizations within each episode. Infants in both groups showed the still-face effect: a significant reduction in smiling from episode 1 (baseline) to episode 2 (maternal still-face) and partial return to baseline in episode 3 (recovery). A multivariate analysis of covariance (MANCOVA) for big smiles yielded significant main effects for group and episode and a significant group episode interaction. Preterm infants spent less time than full-term infants displaying big smiles in episode 1 and a less pronounced decrease in big smiles in episode 2. Maternal depressive symptoms did not differ significantly between groups. Counter to our expectations, depressive symptoms were positively associated with small-to-medium smiles in the baseline episode but not with big smiles in any episode. These findings confirm the robustness of the still-face paradigm and its potential usefulness for research on individual as well as group differences in affective communication in infants. 相似文献
142.
Sonya Douglass Horsford 《The Educational forum》2017,81(2):136-147
AbstractThis article explores the paradox of “race” and U.S. education reform in the 21st century. I consider how the invisible ontology of race and its entangled relationship with class divert our attention from economic inequality and undermine policies intended to redress racial inequality in schools. I conclude that the education research community must unpack its use of “race” and focus on the role of racism in the maintenance of racial caste in America's schools. 相似文献
143.
Recent literature on leadership emphasizes the importance of support systems for individuals occupying prominent roles. This
research examined the support systems of public school principals, comparing male and female and married and unmarried principals.
Specifically, who provided support and the amount and type of support provided were examined. Specific characteristics of
spouses who provide support were also explored. Drawing on surveys of over 170 principals from one southeastern state, the
study found some significant differences and interesting similarities in the type and amount of support provided to male and
female and married and unmarried principals. The findings differed from some of the literature on female principals in terms
of the areas of similarity between males and females. Other findings generally supported the literature on support systems. 相似文献
144.
This study provides a test of a theory which suggests that student perceptions of their classroom environment affect their attitudes toward science. Using the statistical technique of cluster analysis, 27 high school science classes were divided into three distinct clusters which were most distinguishable by the amount of involvement, affiliation with students, teacher support, order and organizations, and innovative teaching strategies. One of the clusters provided a classroom environment which was significantly different from the other two and the students in that environment had more positive attitudes toward science. The dimensions of the classroom environment which make a difference are those which teachers may develop and change in order to enhance the science attitudes and, possibly, the science achievement of their students. 相似文献
145.
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
146.
Rats were used in a conditioned taste aversion procedure in order to examine the effects of context exposure duration during
the conditioning sessions on conditioned responding. One flavor was paired with lithium chloride during a long session in
one context, whereas another flavor was conditioned during a short session in another context. Testing occurred in the home
cage. The results showed that conditioning during short sessions produced strong conditioned taste aversions. Conditioning
during long sessions produced strong conditioned taste aversions when the conditioned-stimulus-unconditionedstimulus (CS-US)
pairing occurred at the end of the lengthy session. Other results showed that context-US associations were formed during the
short duration sessions and that these associations supported conditioned responding to the CS trained in that context. The
results are discussed with respect to the different influences that contextual cues can exert on conditioned responding. 相似文献
147.
In two experiments, resistance to satiation was compared with resistance to extinction. In Experiment 1, rats given initial trials in a straight-alley runway while satiated failed to show increased resistance to satiation in a later test phase. This negative finding contrasts with the increased resistance to extinction usually found following initial nonrewarded trials in a straight alley. In Experiment 2, rats were extinguished or were run while satiated following deprived acquisition, and then were either shifted to the other condition or maintained under the same condition. A greater response decrement was produced by extinction than by satiation, both when current performance was examined and when the persistent effect of satiation or extinction on later performance was examined. These results show that there are important dissimilarities in the effects of satiation and extinction, dissimilarities that suggest that extinction is more nonrewarding or aversive than satiation. It seems likely that extinction involves processes (such as frustration, arousal of aversive motivation, and conditioned inhibition) not involved in satiation, which account for the greater response decrement in extinction as compared with satiation. 相似文献
148.
M Weinraub L P Clemens A Sockloff T Ethridge E Gracely B Myers 《Child development》1984,55(4):1493-1503
The onset and development of preschoolers' awareness of sex role stereotypes, gender labeling, gender identity, and sex-typed toy preference were explored in 26-, 31-, and 36-month-old children. Gender labeling, gender identity, sex-typed toy preferences, and awareness of adult sex role differences were observed in significantly more 26-month-old children than would have been expected by chance. Verbal gender labeling was observed in a majority of 26-month-olds, while verbal and nonverbal gender identity were observed in a majority of 31-month-olds. Nonverbal gender labeling and awareness of adult sex role differences were observed in a majority of children by 36 months. No evidence of awareness of sex differences in children's toys was found in the majority of children at any age. Awareness of sex role differences in children's toys was not related to awareness of adult sex role differences. Brighter children were more aware of adult sex role differences. Sex-typed toy preference was not related to awareness of sex role differences but was related to gender identity. Predictors of sex role development included the mothers' employment, and the father's personality traits, attitudes toward women, and sex-typed activities in the home. Implications for theories of early sex role development are discussed. 相似文献
149.
Inferences and recall at ages 4 and 7 were studied as a function of the cause of a target event, the presence and timing of questions prior to recall, and the type of inference demanded by the questions. 7-year-olds inferred and recalled well with stories containing any of the causal connections employed in the study. 4-year-olds performed better when physical causes, rather than either psychological causes or enabling relations, connected events. Timing of questions did not affect the 7-year-olds' inferences, but asking questions interfered with their recall. Questions about story events aided the 4-year-olds' ability to make inferences and to recall, especially when causal connections were least specified and when questions were asked following the story. 4- and 7-year-olds also differed in responding to demands for 3 specific types of inference. 4-year-olds produced significantly more unconstrained inferences than logical or constrained informational inferences. 7-year-olds were most responsive to logical inference questions, and produced significantly more logical than constrained inferences. 相似文献
150.
OBJECTIVE: This study compares abnormal genital examination findings made by pediatric emergency medicine (PEM) physicians to examinations by physicians with training in child sexual abuse in the evaluation of prepubertal girls for suspected sexual abuse. METHOD: A prospective study was performed following the genital examination by a PEM physician of prepubertal girls suspected of being sexually abused. A physician with training in child sexual abuse re-examined those girls whose examinations were interpreted as abnormal by the PEM physicians. The findings and interpretations of the PEM physician were then compared to those by the physicians with training in child abuse. RESULTS: Between October 1994 and October 1998, 46 patients diagnosed by PEM physicians with nonacute genital findings indicative of sexual abuse were re-examined by a physician with training in child abuse. The follow-up examinations were done 2 days-16 weeks (mean 2.1 weeks) after the emergency department visit. The physicians with training in child abuse concluded that only eight of these children (17%) showed clear evidence of abuse. Normal findings were noted in 32 children (70%), nonspecific changes were noted in 4 children (9%), and 2 children (4%) had findings that are more commonly seen in abused children than nonabused children but are not diagnostic for abuse (concerning for abuse). CONCLUSIONS: There was poor agreement between the pediatric emergency medicine physicians and the physicians with training in child sexual abuse. This study suggests that emergency medicine physicians should consider additional training in this area. In addition, all children with abnormal ED examinations should have follow-up examinations by a child abuse trained physician. 相似文献