Sex differences and sex bias on the Boehm test of basic concepts: Do they exist?     

A. B. Silverstein  Denise N. Morita  Kymberli A. Belger 《Psychology in the schools》1983,20(3):269-270

Form A of the Boehm Test of Basic Concepts (BTBC) was administered to 180 kindergartners—90 boys and 90 girls. Neither their mean scores nor their standard deviations differed significantly, and the distributions of scores for the two groups were virtually identical. Moreover, the application of three internal criteria for bias yielded totally negative results; thus, there was no evidence of either sex differences or sex bias in the data.  相似文献   

Effects of dynamic upper-body exercise on lower-limb isometric endurance     

Easton C  Finlay C  Findlay C  Morrison G  Spurway NC 《Journal of sports sciences》2007,25(10):1101-1107

Following preliminary indications that in some individuals arm exercise enhanced rather than reduced simultaneous leg endurance, ten young men and women performed three forms of intermittent work to volitional exhaustion, under duty cycles of 45 s work, 15 s rest. The protocols were as follows: (A) knee extensions at 30% maximum voluntary contraction (MVC); (B) 30% MVC knee extensions combined with arm cranking at 130% of their own lactate threshold; (C) combined 30% MVC knee extensions and arm cranking at 20% of their own lactate threshold. Heart rate, oxygen uptake (VO(2)), and blood lactate concentration were among the variables recorded throughout. All physiological indicators of demand were substantially higher in protocol B than in protocols A or C [heart rate: (A) 154 beats . min(-1), (B) 171 beats . min(-1), (C) 150 beats . min(-1); VO(2): (A) 11.9 ml . kg(-1) . min(-1), (B) 21.7 ml . kg(-1) . min(-1), (C) 14.2 ml . kg(-1) . min(-1); blood lactate concentration: (A) 3.3 mmol . l(-1), (B) 5.1 mmol . l(-1), (C) 2.8 mmol . l(-1)], yet there were no significant differences (P > 0.05) in the endurance times between the three conditions [(A) 11.43 min, (B) 11.1 min, (C) 10.57 min] and seven participants endured longest in protocol B. Results from protocol (C) cast doubt on explanations in terms of psychological distraction. We suggest that lactic acid produced by the arms is shuttled to the legs and acts there either as a supplementary fuel source or as an antagonist to the depressing effects of increased potassium concentration.  相似文献   

Anthropometric dimensions of male powerlifters of varying body mass   总被引：1，自引：1，他引：0  

Keogh JW  Hume PA  Pearson SN  Mellow P 《Journal of sports sciences》2007,25(12):1365-1376

In this study, we examined the anthropometric dimensions of powerlifters across various body mass (competitive bodyweight) categories. Fifty-four male Oceania competitive powerlifters (9 lightweight, 30 middleweight, and 15 heavyweight) were recruited from one international and two national powerlifting competitions held in New Zealand. Powerlifters were assessed for 37 anthropometric dimensions by ISAK (International Society for the Advancement of Kinanthropometry) level II and III accredited anthropometrists. The powerlifters were highly mesomorphic and had large girths and bony breadths, both in absolute units and when expressed as Z(p)-scores compared through the Phantom (Ross & Wilson, 1974). These anthropometric characteristics were more pronounced in heavyweights, who were significantly heavier, had greater muscle and fat mass, were more endo-mesomorphic, and had larger girths and bony breadths than the lighter lifters. Although middleweight and heavyweight lifters typically had longer segment lengths than the lightweights, all three groups had similar Zp-scores for the segment lengths, indicating similar segment length proportions. While population comparisons would be required to identify any connection between specific anthropometric dimensions that confer a competitive advantage to the expression of maximal strength, anthropometric profiling may prove useful for talent identification and for the assessment of training progression in powerlifting.  相似文献   

A fluid dynamic investigation of the Big Blade and Macon oar blade designs in rowing propulsion     

Caplan N  Gardner TN 《Journal of sports sciences》2007,25(6):643-650

The purpose of this investigation was to examine the fluid dynamic characteristics of the two most commonly used oar blades: the Big Blade and the Macon. Scaled models of each blade, as well as a flat Big Blade, were tested in a water flume using a quasi-static method similar to that used in swimming and kayaking research. Measurement of the normal and tangential blade forces enabled lift and drag forces generated by the oar blades to be calculated over the full range of sweep angles observed during a rowing stroke. Lift and drag force coefficients were then calculated and compared between blades. The results showed that the Big Blade and Macon oar blades exhibited very similar characteristics. Hydraulic blade efficiency was not therefore found to be the reason for claims that the Big Blade could elicit a 2% improvement in performance over the Macon. The Big Blade was also shown to have similar characteristics to the flat plate when the angle of attack was below 90 degrees , despite significant increases in the lift coefficient when the angle of attack increased above 90 degrees . This result suggests that the Big Blade design may not be completely optimized over the whole stroke.  相似文献   

Identity work in the classrooms: Successful learning in urban schools     

Nathan N. Alexander 《Multicultural Perspectives》2016,18(4):237-239

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Wishes of fourth-through seventh-grade gifted students     

Frances A. Karnes  Jeffrey N. Wherry 《Psychology in the schools》1981,18(2):235-239

Three wishes and primary wishes of fourth- through seventh-grade gifted students participating in a residential program for the gifted were collected and categorized. The results indicated that males wished for material things more often than did females. With the exception of fourth graders, subjects made altruistic wishes more frequently than any other wish.  相似文献   

Children born at risk: What's happening in kindergarten?     

Jill N. Reic  Jerry W. Cleland  Stephanie R. Stilson  J. Clifford Kaspar  Deborah L. Holmes 《Psychology in the schools》1993,30(1):50-52

Many studies examine the development of infants born at risk for medical and developmental problems during the early years of life, but far fewer follow these children into their school years. This project compared high-risk vs. low-risk children in their performance on the WPPSI at pre- and postkindergarten levels. In general, both groups of children demonstrated increases in performance; however, their patterns of performance were different. The high-risk children showed increases predominantly in the Performance areas of the test, whereas the low-risk children demonstrated increases predominantly in the Verbal areas.  相似文献   

Utility of P-SEP,sTREM-1 and suPAR as Novel Sepsis Biomarkers in SARS-CoV-2 Infection     

Sagar Dholariya  Deepak N. Parchwani  Ragini Singh  Madhuri Radadiya  C. D. S. Katoch 《Indian journal of clinical biochemistry : IJCB》2022,37(2):131

The coronavirus disease 2019 is a highly contagious viral infection caused by SARS-CoV-2 virus, member of coronaviridae family. It causes life threatening complications due to complexity and rapid onset course of the disease. Early identification of high-risk patients who require close monitoring and aggressive treatment remains challengeable till date. Novel biomarkers which help to identify high risk patients at the early stage is high priority. Objective of this review to find utility of P-SEP, sTREM-1 and suPAR for diagnosis, risk stratification and prognosis of SARS-CoV-2 infected cases. Soluble receptors like, P-SEP, sTREM-1 and suPAR have been involved in immune regulation in SARS-CoV-2 infection and elevate more in severe cases. A comprehensive research of databases like PubMed, EMBASE, CNKI and Web of Science was performed for relevant studies. A total of nine out of fifteen research literature in initial screening were included for this review. Interestingly all studies have reported high levels of P-SEP, sTREM-1 and suPAR in SARS-CoV-2 infected cases and the biomarkers positively correlated with severity of infection. This implies that P-SEP, sTREM-1 and suPAR can be implemented as surrogate marker in blood profile for early diagnosis, risk stratification and prognosis in SARS-CoV-2 for better management in Indian population at the current situation.  相似文献   

Parental anxiety,language, assertion,and expectation factors in subsequent understanding and recall of assessment information     

Jerome Zake  Robert N. Wendt 《Psychology in the schools》1991,28(2):156-164

The purpose of this study was to investigate the relationship between initial understanding of information given by the school psychologist at parent conferences and characteristics of parents (anxiety, parental expectations, assertion, and language level). Demographic variables were also explored as they related to postassessment recall and understanding of data. Results indicated that language level of the parent, age of the parent, and SES were significantly related to recall. Anxiety, assertion, and expectation of results were not significant factors. Implications for practice and training are discussed.  相似文献   

P&I Bookshelf. Effective human resource development     

N. E. Chalofsky  C. Reinhart  Ed Blankenhagen 《Performance Improvement》1991,30(3):49-49

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