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251.
A prospective, longitudinal study of a low birthweight, preterm cohort examined the effects of maternal knowledge of child development and concepts of child rearing on the quality of home environment and on child cognitive and behavioral outcomes. Measures of maternal knowledge at 12 months were found to be significantly associated with the quality of the home environment, the number of child behavior problems, and to a small but significant extent child Stanford-Binet IQ at 36 months. Maternal characteristics were associated with both maternal knowledge and maternal behavior. Child characteristics, including birthweight, were not associated with maternal knowledge or concepts of development for most of the cohort. Subgroup analyses by race/ethnicity revealed a similar pattern of results. However, a measure of neonatal health status was shown to be significantly associated with cognitive outcome in the African-American subgroup at 24 and 36 months.  相似文献   
252.
This study investigates two facets of children's school readiness: interest in new cognitive tasks (interest) and persistence in task completion (persistence). Little attention has been paid to the early development of these learning behaviors, although they might prove susceptible to intervention even before school entry. Using data from the Early Head Start Research and Evaluation Project, a sample of low-income children (N = 1771) was followed to model bidirectional associations among interest and persistence and maternal supportive parenting between ages 1 and 3, and estimate associations between children's interest and persistence at age 3 and their academic skills at age 5. Results indicate that maternal supportive parenting influences children's interest and persistence more strongly and consistently than interest or persistence influences parenting, and that interest but not persistence transacts with parenting over time. Interest and persistence were equally predictive of children's early academic skills. Findings affirm that both interest and persistence during toddlerhood predict children's academic standing at school entry.  相似文献   
253.
We examine differences in intelligence test scores of black and white 5-year-olds. The Infant Health and Development Program data set includes 483 low birthweight premature children who were assessed with the Wechsler Preschool and Primary Scale of Intelligence. These children had been followed from birth, with data on neighborhood and family poverty, family structure, family resources, maternal characteristics, and home environment collected over the first 5 years of life. Black children's IQ scores were 1 SD lower than those of white children. Adjustments for ethnic differences in poverty reduced the ethnic differential by 52%. Adjustments for maternal education and whether the head of household was female did not reduce the ethnic difference further. However, differences in home environment reduced the ethnic differential by an additional 28%. Adjustments for economic and social differences in the lives of black and white children all but eliminate differences in the IQ scores between these two groups.  相似文献   
254.
Young people need to understand and have meaningful relationships with the elderly. One of the ways that this understanding can be initiated and enhanced is for adolescents to read literature that presents them with realistic and believable youth‐aged relationships. However, a reading and analysis of some of the available, contemporary adolescent literature that depicts youth‐aged relationships reveals that the attitudes, actions, and feelings of the fictional characters do not represent those of the youth and the aged in today's society.  相似文献   
255.
Infants’ transfer of information from pictures to objects was tested by familiarizing 9‐month‐olds (= 31) with either a color or black‐and‐white photograph of an object and observing their preferential reaching for the real target object versus a distractor. One condition tested object recognition by keeping both objects visible, and the other tested object representation by hiding both objects. On visible trials, infants reached more for the distractor, indicating they recognized the target object from its picture. On hidden trials, infants reached more for the target object, suggesting they formed a continued representation of the object based on its picture. Photograph color had no effect. Infants thus show picture‐to‐object transfer by 9 months with preferential reaching, even with black‐and‐white pictures.  相似文献   
256.
About half of 2,581 low-income mothers reported reading daily to their children. At 14 months, the odds of reading daily increased by the child being firstborn or female. At 24 and 36 months, these odds increased by maternal verbal ability or education and by the child being firstborn or of Early Head Start status. White mothers read more than did Hispanic or African American mothers. For English-speaking children, concurrent reading was associated with vocabulary and comprehension at 14 months, and with vocabulary and cognitive development at 24 months. A pattern of daily reading over the 3 data points for English-speaking children and daily reading at any 1 data point for Spanish-speaking children predicted children's language and cognition at 36 months. Path analyses suggest reciprocal and snowballing relations between maternal bookreading and children's vocabulary.  相似文献   
257.
A synthesis of the extant research on reading interventions for students with reading difficulties and disabilities in fourth and fifth grade (ages 9–11) is presented. Thirteen studies with treatment/comparison study designs and eleven single group or single subject studies were located and synthesized. Findings from the 24 studies revealed high effects for comprehension interventions on researcher-developed comprehension measures. Word recognition interventions yielded small to moderate effects on a range of reading outcomes. Few studies were located implementing vocabulary and multi-component interventions.  相似文献   
258.
Despite decades of precollege science education programs, African Americans, Latinos, and Native Americans remain critically underrepresented in science and health professions. This report describes college and career outcomes among graduates of the Stanford Medical Youth Science Program (SMYSP), a 5-week summer residential program for low-income high school students among whom 97% have been followed for up to 21 years. Approximately 24 students are selected annually, with participation limited to low-income students who have faced substantial personal hardships. Undergraduate and medical students provide key program leadership and training. The curriculum is based on science inquiry education and includes hospital internships, anatomy practicums, research projects, faculty lectures, college admissions/standardized test preparation, and long-term college and career guidance. A total of 476 high school students participated between 1988 and 2008, with 61% from underrepresented ethnic minority groups. Overall, 78% of African American, 81% of Latino, and 82% of Native American participants have earned a 4-year college degree (among those admitted to college, and excluding those currently attending college). In contrast, among 25–34-year old California adults, 16% of African Americans, 8% of Latinos, and 10% of Native Americans earn a 4-year college degree. Among SMYSP’s 4-year college graduates, 47% are attending or have completed medical or graduate school, and 43% are working as or training to become health professionals. SMYSP offers a model that expands inquiry-based science education beyond the classroom, and recognizes the role of universities as “high school interventionists” to help diversify health professions.  相似文献   
259.
Abstract

The aim of this study was to assess technical changes during constrained swimming in time-to-exhaustion tests. Ten swimmers of national standard performed a maximal 400-m front crawl and two sets of exhaustion tests at 95%, 100%, and 110% of mean 400-m speed. In the first set (free), swimmers had to maintain their speeds until exhaustion and mean stroke rate was recorded for each test. In the second set (controlled), the same speed and individual corresponding stroke rate were imposed. The durations of the exhaustion tests, relative durations of the stroke phases, and arm coordination were analysed. For each speed in the “controlled” set, the exhaustion tests were shorter. Moreover, variables were consistent, suggesting a stabilization of stroke technique. Under the free condition, stroke rate increased to compensate for the decrease in stroke length. At the same time, swimmers reduced the relative duration of their non-propulsive phases in favour of the propulsive phases. Thus, swimmers changed their arm coordination, which came close to an opposition mode. These two constraints enable swimmers both to maintain their stroking characteristics and develop compensatory mechanisms to maintain speed. Moreover, stroke rate can be seen as a useful tool for controlling arm technique during paced exercise.  相似文献   
260.
Supplemental instruction (SI) is a small-group, peer-mentored programme which is compatible with the learning preferences of American Indian students. We tested the hypothesis that SI is a compensatory strategy that reduces the differences in the grades earned in introduction to psychology by Euro-American and American Indian students. The sample consisted of 129 American Indian students and 4588 Euro-American students enrolled in introduction to psychology at a US university. As hypothesised, a multi-level model yielded a significant (p < .01) interaction between SI and ethnicity on course grade. Whereas for non-SI users, the gap between Euro-American and American Indian students was .71 grade points, for SI users, it was only .15 grade points. Strategies should be devised for increasing SI visits by students enrolled in introduction to psychology, particularly those who belong to American Indian tribes.  相似文献   
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