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Online focus groups may provide a new tool for research conducted in sport science settings (e.g., psychology, sociology, management, physical education, and recreation). Benefits of online focus groups include the ability for people in multiple locations to respond synchronously via chat rooms or asynchronously via discussion software. Additional benefits include increased equality of participation, greater participant diversity, the matching of research design with research environment, researcher interaction, and the elimination of transcribing. Disadvantages include under representation of non-Internet users, lack of face-to-face contact, potential participant no-show rate, and the difficulty of securing data on the Internet. Sport science scholars are encouraged to examine this emerging method as related to their specific research aims and consider application of online focus groups to further their research. 相似文献
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Sheri Brown 《Clearing house (Menasha, Wis.)》2013,86(5):255-258
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J. Halloran R.L. Brown D.C. Chaney Robert D. Singer 《Communication Booknotes Quarterly》2013,44(3):2-3
J. Halloran, R.L. Brown, and D.C. Chaney's Television and Delinquency (Leicester University Press, Television Research Committee Working Paper No. 3, $4.50--available in the U.S. from Humanities Press Inc., 303 Park Ave South, New York 10010) Seymour Feshbach and Robert D. Singer's Television and Agression: An Experimental Field Study (Jossey-Bass (San Fransisco), $8.50) 相似文献
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A linearly variable element is any passive two-terminal network element in which the immittance varies linearly with respect to an independent (of frequency) real variable, x. A definite set of fundamental passive two terminal network elements (F- elements) consisting of fixed passive elements and linearly variable elements is presented. It is shown that any network consisting of only F-elements has a driving point immittance, D(s,x), that is positive real for s complex, x real and positive real for x complex, s real. Conditions on the variable coefficients, degree and location of zeros and poles of D(s,x) are established. A method of testing whether D(s,x) is positive real for one complex and one real variable is developed. This testing is accomplished by extending the Hurwitz and Sturm test to one complex and one real variable. 相似文献