Fehlende Werte in sportwissenschaftlichen Untersuchungen

Missing values are a serious statistical problem in empirical studies which tends not to be considered in sport scientific studies. The methods usually applied such as listwise and pairwise deletion, mean and regression imputation do not constitute satisfactory solutions. New methods such as Maximum Likelihood Estimation (ML) and Multiple Imputation (MI) have not yet been widely implemented. The aim of this article is to change this situation. For this purpose, this article provides an overview of the missing data theory stated by Rubin (1976). Based on this approach, different methods for dealing with the problem of missing data will be presented and discussed. Special emphasis is put on new methods, in particular MI. In the past, the application of MI required special software. Since the implementation of MI in SPSS 17 (SPSS 2009) there is no obstacle for a routine usage of this method to handle missing data problems. The implementation of MI will be illustrated with an empirical study with a missing data mechanism typical for sport scientific studies. Using this example, advantages of MI as well as current limitations and practical difficulties will be discussed.     

Understanding Gender through Disney’s Marriages: A Study of Young Korean Immigrant Girls

Much American popular culture has often been criticized for its negative portrayals of females and its potentially harmful influence on young children. However, there are insufficient studies about American young girls’ actual understanding of these female representations. Specifically, the perspectives of young immigrant girls have hardly been addressed in the existing research, even though their perspectives can be derived from what they learn about the social values associated with gender through their exposure to popular culture. This paper thus focuses on young Korean immigrant girls as a significant American immigrant group, and examines their ideas about gender in American popular culture—particularly, Disney films. Since their perceptions of gender were often derived from their discussions of marriage in the films, it closely investigates their understanding of gender roles, as considered through the marriages of Disney protagonists. It then discusses their perceptions of Disney by tracing these ideas to their beliefs about how these same themes become manifested in realistic situations. Finally, this paper provides implications and suggestions for researchers and early childhood educators.

CHANGING PERCEPTIONS OF SOCIETAL PROBLEMS AMONG SOVIET YOUTH

Dramatic changes in the perceptions of problems in the SovietUnion and in the USA are shown among samples of Soviet youthstudied over a three-year period, from 1988 to 1991. Growingdisillusionment with worsening domestic conditions was mirroredby a growing, unrealistic appreciation of life in the USA, reflectinga painful search for a new national identity.     

Just us,just discussing: imagined homogeneities in the Gender Studies classroom

This article explores practices of othering through formations of normative sameness in discussion-based seminar classrooms. It takes literary scholar Stanley Fish's question, ‘Is there a text in this class, or is it just us?’, back into the classroom to explore the formation of a ‘just us,’ an imagined homogeneous interpretive community which, I argue, has discriminatory effects by normalising some voices and practices. It draws on feminist and anti-oppressive theory to discuss ways to pedagogically trouble the enactment of homogeneous interpretive communities in the Gender Studies classroom. As the Gender Studies teacher, I devised pedagogical practices based on the allocation of specific roles as a way to work towards an anti-discriminatory classroom by de-mystifying academic practice and framing seminar practice as a social genre. The article critically reflects on students' subsequent reluctance to take on roles and their preference for free-flowing discussions, doing what comes naturally, a ‘doing' of academia which, I suggest, is linked to social privilege.     

Faculty Awareness and Perception of Streaming Video for Teaching

Streaming is an increasingly popular delivery method for audiovisual content in higher education and has been embraced by many libraries, sometimes without sufficient communication with faculty. The authors developed a survey with the primary purpose of determining whether faculty on their campus were aware of the library's streaming video services and what barriers might be preventing wider use. The study sought to gather contextual information on faculty preferences, interests, and awareness regarding library media collections, audiovisual delivery formats, and the use of streaming video for instruction. This information will inform actions and decisions about collections and outreach.     

A cross-cultural study of parents' perceptions of early childhood programs

Cross-cultural studies in early childhood education assist in expanding perspectives and gaining increased understanding and appreciation of programs in other countries. Because both Sweden and the United States are interested in parent involvement in early childhood programs, a survey was conducted to assess parent's perceptions of these programs. Following a review of family life and early childhood education in Sweden and the United States are the specific components of the cross-cultural study. A stratified random sample of parents whose children were involved in early childhood programs was done in St. Louis County, MN, United States, and Kronobergs Lan, Småland, Sweden. In the first section of the five-part survey, parents indicated the degree to which they agreed or disagreed with statements about such areas as governmental support of children and families. Parents in Sweden felt more support of the government, whereas parents in the United States used early childhood programs as a support mechanism to increase their confidence. In the other four sections of the survey, parents rated the importance of various types of parental involvement and the importance of various materials, activities, and caregiver actions in their children's programs. In general, parents in Sweden valued informal contact and inner-directed creative materials and activities. Parents in the United States valued more confining activities such as rote counting, community-based experiences, and compliance with adult expectations. The influence of the macro-society on parents' perceptions as well as microsystem interactions and environments is evident in this study. As early childhood educators learn about and adapt new ideas to their own programs, the potential of cross-cultural studies becomes realized in improved opportunities for young children and their families.     

Biological Principles and Threshold Concepts for Understanding Natural Selection

Modern evolutionary theory is both a central theory and an integrative framework of the life sciences. This is reflected in the common references to evolution in modern science education curricula and contexts. In fact, evolution is a core idea that is supposed to support biology learning by facilitating the organization of relevant knowledge. In addition, evolution can function as a pivotal link between concepts and highlight similarities in the complexity of biological concepts. However, empirical studies in many countries have for decades identified deficiencies in students’ scientific understanding of evolution mainly focusing on natural selection. Clearly, there are major obstacles to learning natural selection, and we argue that to overcome them, it is essential to address explicitly the general abstract concepts that underlie the biological processes, e.g., randomness or probability. Hence, we propose a two-dimensional framework for analyzing and structuring teaching of natural selection. The first—purely biological—dimension embraces the three main principles variation, heredity, and selection structured in nine key concepts that form the core idea of natural selection. The second dimension encompasses four so-called thresholds, i.e., general abstract and/or non-perceptual concepts: randomness, probability, spatial scales, and temporal scales. We claim that both of these dimensions must be continuously considered, in tandem, when teaching evolution in order to allow development of a meaningful understanding of the process. Further, we suggest that making the thresholds tangible with the aid of appropriate kinds of visualizations will facilitate grasping of the threshold concepts, and thus, help learners to overcome the difficulties in understanding the central theory of life.