Relationship between exchange block time in swim starts and final performance in relay races in international championships

Abstract

The purpose of this study was to investigate the association between relay exchange block time and final performance in 4 × 100-m and 4 × 200-m freestyle and 4 × 100-m medley relays as a function of sex (men and women) and classification (medallists and non-medallists) in international competitions. Nineteen international competitions covering a 13-year period (2000–2012) were analysed retrospectively. The data corresponded to a total of 827 team relay histories (407 men, 420 women). Kruskal–Wallis and Mann–Whitney tests were performed to determine any differences by sex, classification, and event. Similarly, the relationship between the exchange block times and final performance was examined by means of a Pearson correlation analysis. In the three events, the men’s exchange block times were shorter than those of the women (η² = 0.049–0.109; P < 0.001). The exchange block time was especially relevant for the women’s relay medallists in the 4 × 100-m freestyle (r = 0.306, P = 0.021) and 4 × 100-m medley (r = 0.385, P = 0.011), while for men the relationship was clearer for the non-medallists. These results suggest that the exchange block time should be considered as one of the performance parameters of swimming relay starts, and thus should be included explicitly as part of training. In particular, the coach could design training targeted at standardising an optimal exchange block time equal to or less than that expected for other teams in the competition.     

The introduction of text conventions and its impact on teaching literacy

The introduction of text conventions, such as word separation, the separation of letter and background and the lower‐case letter are appraised with respect to their contribution to literacy instruction. The change in the visual appearance of the graphic word over time led to the assignment of secondary status to spelling and low appreciation of the role of phonology, due to the disappearance of audible speech in skilled reading. Since the two major literacy programmes, whole language and phonics, are based on two different stages of reading, both programmes complement each other. Whole language represents the skilled stage of reading, given its reliance on the graphic word, whereas phonics represents the unskilled stage, owing to its emphasis on the intermediatory role of phonological processing in word recognition. Neither literacy programme offers instruction in the integration of letters in a verbally recoded form with the explicit goal of the creation of word gestalts in the course of literacy acquisition.     

Assessing the effects of school‐wide Second Step implementation in a predominately English language learner,low SES,Latino sample

Because school violence is widespread, social and emotional competence must be targeted. Second Step is a social and emotional violence‐prevention curriculum that teaches prosocial skills and reduces aggressive behavior. The purpose of this study was to examine the effects of Second Step implementation on students (N = 403) in preschool through fourth grade who were predominately Latino, English language learners, and from families with low socioeconomic status. The data of 165 out of the 403 students were included in the present study. Analyses consisted of paired‐samples t‐tests to identify changes in social and emotional knowledge and behavioral and emotional risk. Results showed that there was a significant increase in both social and emotional knowledge and behavioral and emotional risk following the implementation of Second Step. These results are discussed with regard to previous and future research, limitations, and implications for school practice.     

Students’ conception of infinite series

This is a report of a study of students’ understanding of infinite series. It has a three-fold purpose: to show that students may construct two essentially different notions of infinite series, to show that one of the constructions is particularly difficult for students, and to examine the way in which these two different constructions may be built so that we may uncover ways to help students improve their understanding. The theoretical framework consists of action–process–object–schema theory and the specific model of conceptions in Balacheff’s theory of conception, knowing, and concept. Approaching the problem from these two different theoretical perspectives allows us to provide different and at the same time complementary explanations of observed phenomena. The two different infinite series constructions are, briefly stated, series as an infinite unending process of addition and series as a sequence of partial sums. Students are found to have difficulty building an understanding of series as a sequence of partial sums and thus tend to have difficulty in problem situations that require this interpretation. The study uses semi-structured interviews with 10 graduate students. The interviews explore situations that might give insight into students’ notion of the sequence of partial sums.     

Enhancing preschool children's vocabulary: Effects of teacher talk before,during and after shared reading

This observational study analyzed patterns of teacher extratextual talk as it occurs before, during, and after reading books to children, and the frequency and duration of teacher questioning by type (label, define, associate) on preschoolers’ receptive and expressive vocabulary knowledge. Over the course of 18 weeks, 13 teachers and 100 children participated in ninety 20-min small-group sessions of teacher-guided shared reading instruction. Teachers’ reading instruction was examined through videotaped observations using the Multi-Option Observation System for Experimental Studies (MOOSES™; Tapp, Wehby, & Ellis, 1995). Two findings, in particular, yielded relevant educational and theoretical implications. First, time spent after reading was significantly related to expressive vocabulary. However, question timing did not seem to matter in terms of receptive vocabulary outcomes. Second, duration of teacher association questioning was significantly related to receptive vocabulary outcomes while both frequency and duration of teacher vocabulary-related association-level questioning were related to expressive vocabulary. For receptive vocabulary, both vocabulary- and comprehension-related association-level questioning mattered. These findings complement the body of work demonstrating that engaging children in interactive shared reading that elicits their active participation is related to meaningful gains in children's language and literacy growth. Limitations of the study and directions for future research are discussed.     

Evaluating Continuing Resources: Perspectives and Methods from Science Librarians

Five science librarians share their experiences with the evaluation of continuing resources at an academic university and discuss implications caused by the evaluation process. Four of the authors were new to collection evaluations at the time of the Serial Evaluation Project. These new librarians faced many challenges, both personally and professionally, in dealing with the cancellation process. Although the differences in approaches to collection analysis are discussed somewhat, they are not a focus of the article.     

Análisis del desarrollo fonológico en sujetos malagueños

Resumen

El presente estudio intenta analizar, desde una perspectiva psicolinguistica, el desarrollo fonológico de niños castellanoparlantes de la ciudad de Málaga, en función de variables como el sexo, el nivel sociocultural y edad de los sujetos, atendiendo, por otra parte, a la influencia de características dialectales del habla andaluza.

Tras la elaboración y administración de una prueba de screening, en condiciones de imitación, se registraron las producciones correctas y distintos procesos de simplificación del habla (sustitución, relativos a la estructura de la sílaba y asimilatorios), no encontrándose diferencias significativas con respecto al sexo, aunque sí en cuanto al nivel sociocultural y a la edad de los sujetos.

Cabe destacar que la influencia del modelo lingüístico andaluz podría enmascarar los patrones evolutivos del desarrollo fonológico infantil. Sin embargo, el hecho de que los sujetos malagueños presenten porcentajes bajos en pronunciación correcta en edades avanzadas, en algunas categorías de fonemas, es debido a la influencia de variantes dialectales, más a que presenten patrones evolutivos más tardíos en cuanto a su capacidad de representación fonológica.     

Course Design,Quality Matters Training,and Student Outcomes

ABSTRACT

North Carolina Central University (NCCU) recognized the need to address the increasing rates of Ds, Fs, and Withdrawal by students matriculating in online courses. Led by two science faculty, a faculty learning community in partnership with the NCCU Division of Extended Studies was created to assess online science course offerings and instruction. Faculty within this learning community completed the Quality Matters (QM) “Applying the Quality Matters Rubric” course. This online training course, coupled with services provided by the NCCU Division of Extended Studies, offered the faculty learning community a variety of pedagogical strategies to meet their instructional needs. All faculty participating in this learning community completed the online training course and all faculty indicated that they implemented changes in their subsequent online course offerings. This article describes the impact of that training and the application of quality course design standards in the Quality Matters Rubric on the design and student outcomes for an Introductory Biology course over four terms. As faculty learning communities are broadly utilized, it is anticipated that this article may present an effective strategy to increase the quality and quantity of online science, technology, engineering and mathematics (STEM) courses at similar institutions.