It Takes Two to Replicate: A Mediational Model for the Impact of Parents' Stress on Adolescent Adjustment   总被引：15，自引：1，他引：15  

Rand D. Conger  Gerald R. Patterson  Xiaojia Ge 《Child development》1995,66(1):80-97

In this study of parental stress and adolescent adjustment, experiences of negative life events during the recent past were used to generate a measure of acute stress. In addition, multiple indicators based on reports from various informants were used to estimate latent constructs for parental depression, discipline practices, and adolescent adjustment. Employing 2 independent samples of families from 2 different regions of the country (rural Iowa and a medium-sized city in Oregon), structural equation models were used to test the hypothesis that in intact families acute stress experienced by parents is linked to boys' adjustment (average age equaled 11.8 years in the Oregon sample, 12.7 years in the Iowa sample) through 2 different causal mechanisms. The findings showed that parental stress was related to adjustment through stress-related parental depression that is, in turn, correlated with disrupted discipline practices. Poor discipline appears to provide the direct link with developmental outcomes. The structural equation model (SEM) used to test the proposed mediational process was consistent with the data for mothers and boys from both the Oregon and the Iowa samples. The similarity in results was less clear for fathers and boys. Implications of these results for future replication studies are discussed.  相似文献   

Learners and learning contexts: international perspectives on new alignments for the digital age     

Voogt  Joke  Knezek  Gerald 《Educational technology research and development : ETR & D》2021,69(4):2083-2089

Educational technology research and development - Twelve papers representing 59 authors from 16 different nations are included in this special issue addressing the theme of ‘Learners and...  相似文献   

The discrete charm of the bourgeoisie: quantum and continuous perspectives on innovation and growth     

Gerald Silverberg 《Research Policy》2002,31(8-9)

This paper discusses the relative merits of discrete versus continuous perspectives on innovation, technical change, and economic growth. It discusses the innovation time series literature in some detail to extract the continuous and clustering properties of the historical record on innovation. It then proposes a mosaic/avalanche model based on percolation theory and self-organized criticality to address this question.  相似文献   

The relationship between science process skill and formal thinking abilities     

Michael J. Padilla  James R. Okey  F. Gerald Dillashaw 《科学教学研究杂志》1983,20(3):239-246

The purpose of this study is to examine integrated process skill and formal thinking abilities of middle and high school students and determine the relationship, if any, between the two. A relationship was thought to exist since both sets of skills strongly emphasize conducting fair experiments as well as other abilities. Pencil and paper measures of formal operational and integrated process skill achievement were given to almost 500 grade 7–12 students. Resulting correlations showed a strong relationship between achievement on the two meansures (r = 0.73) and all subtests of both measures. Factor analysis data corroborate the correlational evidence. One potential inference to be drawn from these results is that process skill teaching might influence formal thinking ability. A follow-up experimental study will determine this.  相似文献   

The effect of l-citrulline and watermelon juice supplementation on anaerobic and aerobic exercise performance     

Paul T. Cutrufello  Stephen J. Gadomski  Gerald S. Zavorsky 《Journal of sports sciences》2015,33(14):1459-1466

Citrulline has been proposed as an ergogenic aid, leading to an interest in watermelon given its high citrulline concentration. The aim of this study was to determine the effects of a single, pre-exercise dose of l-citrulline, watermelon juice, or a placebo on the total maximum number of repetitions completed over 5 sets, time to exhaustion, maximal oxygen consumption (VO₂max), anaerobic threshold, and flow-mediated vasodilation. A randomised double-blind within-participants study design was used to examine these effects among 22 participants (n = 11 males). Supplementation included either a 7.5% sucrose drink containing 6 g of l-citrulline, 710 mL of watermelon juice (~1.0 g citrulline), or a 7.5% sucrose placebo drink. Supplementation was administered 1 or 2 h before exercise testing to investigate a timing effect. There was no significant effect between the three supplements for the total number of repetitions, time to exhaustion, VO₂max, anaerobic threshold, or flow-mediated vasodilation. There was also no interaction observed relative to gender or supplement timing (P > 0.05). A single dose of l-citrulline or watermelon juice as a pre-exercise supplement appears to be ineffective in improving exercise performance; however, greater doses of l-citrulline have been shown to be safe and are currently left unexamined.  相似文献   

Foreword     

Annette R. Hofmann  Gerald Gems  Maureen Smith 《国际体育史杂志》2015,32(4)

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Acquittal     

Gerald Russello 《Academic Questions》2014,27(2):237-243

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Selection of Outstanding Teachers     

Gerald H. Whitlock  James R. Montgomery 《College Teaching》2013,61(3):197-199

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Creating the plural self: athletic teams’ use of members’ bodies     

Gerald Pillsbury 《International journal of qualitative studies in education》2013,26(1):35-48

Galatzer‐Levy and Cohler's (1993) definition of “ self” allows for the possibility of a “ plural self,” that is, moments when an individual locates the center of initiative for action, feeling, and awareness among a group of people. Using observations and interviews, this investigation explores the ways four basketball teams used players’ bodies to create such a plural self, transforming autonomous individuals into interconnected, deindividualized members. One set of somatic practices made the team perceptible as a whole: huddles, team movements, hand slapping, and certain passing drills. A complementary set of practices encouraged the players to incorporate the team into their bodies. Examples presented of such incorporation are communal relaxation of bodily tension, the rhythms of shared ritual music, and a “sixth sense” of the location of teammates. Acute pain interferes with the emergence of this plural self in both injured and healthy players. The possibility is raised that for many athletes this temporarily realized plural self continues as a possible self and invites the development of certain virtues and failings.  相似文献   

Early Literacy Measures for Improving Student Reading Achievement: Translating Research Into Practice     

Doug Marston  Mary Pickart  Amy Reschly  David Heistad  Paul Muyskens  Gerald Tindal 《Exceptionality》2013,21(2):97-117

The importance of early literacy instruction and its role in later reading proficiency is well established; however, measures and procedures to screen and monitor proficiency in the area of early literacy are less well researched. The purpose of this study was to (a) examine the technical adequacy and validity of early curriculum-based literacy measures, Letter–Sound Correspondence, Onset Phoneme Identification, and Phoneme Segmentation, developed for use within the problem-solving model in the Minneapolis Public Schools and (b) describe the district-wide implementation of these measures. In general, these measures were found to have adequate reliability and validity, have moderate to moderately high correlations with criterion measures (oral reading, report cards), and be sensitive to growth across the school year. A case study of how these measures are used for screening and progress monitoring to improve reading achievement within 1 school is included. Limitations and future directions are also presented.  相似文献