Dynamic visual perception and reading development in Chinese school children

The development of reading skills may depend to a certain extent on the development of basic visual perception. The magnocellular theory of developmental dyslexia assumes that deficits in the magnocellular pathway, indicated by less sensitivity in perceiving dynamic sensory stimuli, are responsible for a proportion of reading difficulties experienced by dyslexics. Using a task that measures coherent motion detection threshold, this study examined the relationship between dynamic visual perception and reading development in Chinese children. Experiment 1 compared the performance of 27 dyslexics and their age- and IQ-matched controls in the coherent motion detection task and in a static pattern perception task. Results showed that only in the former task did the dyslexics have a significantly higher threshold than the controls, suggesting that Chinese dyslexics, like some of their Western counterparts, may have deficits in magnocellular pathway. Experiment 2 examined whether dynamic visual processing affects specific cognitive processes in reading. One hundred fifth-grade children were tested on visual perception and reading-related tasks. Regression analyses found that the motion detection threshold accounted for 11% and 12%, respectively, variance in the speed of orthographic similarity judgment and in the accuracy of picture naming after IQ and vocabulary size were controlled. The static pattern detection threshold could not account for any variance. It is concluded that reading development in Chinese depends to a certain extent on the development of dynamic visual perception and its underlying neural pathway and that the impact of visual development can be specifically related to orthographic processing in reading Chinese.     

Characterizing Students’ Attempts to Explain Observations from Practical Work: Intermediate Phases of Understanding

This study aims to characterize a group of students’ preliminary oral explanations of a scientific phenomenon produced as part of their learning process. The students were encouraged to use their own wordings to test out their own interpretation of observations when conducting practical activities. They presented their explanations orally in the whole class after having discussed and written down an explanation in a small group. The data consists of transcribed video recordings of the presented explanations, observation notes, and interviews. A genre perspective was used to characterize the students’ explanations together with analysis of the students use of scientific terms, gestures, and the language markers “sort of” and “like.” Based on the analysis we argue to separate between event-focused explanations, where the students describe how objects move, and object-focused explanations, where the students describe object properties and interactions. The first type uses observable events and few scientific terms, while the latter contains object properties and tentative use of scientific terms. Both types are accompanied by an extensive use of language markers and gestures. A third category, term-focused explanations, is used when the students only provide superficial explanations by expressing scientific terms. Here, the students’ use of language markers and gestures are low. The analyses shows how students’ explanations can be understood as tentative attempts to build on their current understanding and observations while trying to reach out for a deeper and scientific way of identifying observations and building explanations and new ways of talking.     

Socialization of Doctoral Students to Academic Norms

Using the framework for graduate and professional student socialization developed by Weidman, Twale, and Stein (2001), this study addresses socialization of doctoral students to the academic norms of research and scholarship. Data are presented about the perceptions doctoral students in a social science discipline (sociology) and in educational foundations at a major research university have of the scholarly and collegial climates of their departments. Data on students' social relationships with faculty and peers as well as their reported participation in scholarly activities are also reported. A multivariate analysis provides support for the framework, affirming the importance of social interaction among both students and faculty as well as collegiality among faculty for creating a supportive climate for doctoral study that also has the potential to provide a strong foundation for subsequent academic and/or research careers by stimulating students' research and scholarly productivity.     

Short-term slackline training improves task-specific but not general balance in female handball players

Slackline training has been shown to improve balance and neuromuscular performance. However, recent studies suggested that balance is task-specific, implying that transferability of balance skills is limited and might depend on the similarity of the tasks. This study therefore investigated if short-term slackline training could improve performance in balance tasks that are either more or less similar to the trained slackline task. Furthermore, we assessed potential transfer effects to other neuromuscular performance tests.

25 female handball players (23.7?±?3.9 years) participated in our study and were matched to either a slackline training (SLT; n?=?14) or a control group (CON; n?=?11). The intervention comprised 12 sessions with overall 120 minutes of slackline training using single and double slacklines. Slackline standing time and measures of dynamic and static balance were assessed before and after the intervention, as well as power and sprint-related performance parameters.

Two-way repeated-measures ANOVA found a significant group?×?time interaction for slackline standing time, indicating larger training effects for SLT. For the remaining dynamic and static balance tests, no significant interactions were found. With regard to neuromuscular performance, there was a significant group?×?time interaction only in change of direction.

In essence, the study showed that slackline training induced task-specific balance improvements without affecting general balance. This adds further evidence to the task-specificity principle of balance, although the specificity of the sample as well as the briefness of the intervention should be taken into account when generalizing our findings. Nonetheless, this study contains practical implications for team sports interventions and future balance training studies, highlighting the importance of selecting appropriate balance exercises to yield rapid and the desired training outcomes.     

Kids,Television, and Violence

Aletha Huston Stein and Lynette Kohn Freidrich's Impact of Television on Children and Youth (Chicago: University of Chicago Press, 1975—$2.50, paper)

M.S. Heller and S. Polsky's Studies in Violence and Television (New York: Research Services Division of American Broadcasting Company, 1976—apparently free on request to researchers, paper)     

Coach learning to help teachers learn to enact conceptually rich,student-focused mathematics lessons

The past decade has witnessed a strong, standards-based call for improving what mathematics is taught and how it is taught. In the USA, districts have hired instructional coaches to help teachers shift their teaching from algorithm-based instruction to instruction that is more student-centered and conceptually focused. The purpose of this study was to contribute to the field’s understanding of (a) the specific coaching practices that help teachers enact more conceptual-based forms of instruction; and (b) how coaches learn to enact those practices. Using a design-based implementation research approach, we trained coaches using a particular model for one-on-one coaching (Content-Focused Coaching); the coaches then worked with teachers to plan lessons aligned with the coaching model. Data consisted of videotapes of pre-lesson conferences that were transcribed and coded according to the model. Analyses of 32 coaches’ practice over a 2-year period suggest that each of the three components of our coaching model (attention to student thinking, pedagogy, and mathematics) demonstrated statistically significant improvement over time. An illustrative analysis of five coaching sessions of one coach revealed a progression over five sessions from planning discussions that stayed at the level of general strategies to more specific conversations about teaching a particular task and then to deeper discussions that integrate attention to mathematical concepts, student thinking, and pedagogical moves. We view this delineation of coach learning as an important first step in laying the groundwork for the design of future coach training.

     

The signed reading fluency of students who are deaf/hard of hearing

Reading fluency in deaf children whose primary mode of communication is visual, whether English-like or American Sign Language, is difficult to measure since most measures of fluency require a child to read aloud. This article opens the discussion of a new construct, namely, signed reading fluency (i.e., rendering of printed text in a visually fluent manner) in children with hearing loss whose primary means of expressive language includes some form of sign. Further, it describes the development of an assessment rubric to measure signed reading fluency. A comparison of fluency scores and scores on tests of vocabulary and text comprehension of 29 middle school students who attended a school for the deaf indicated that signed reading fluency, as defined and measured by this instrument, correlates highly both with word and passage comprehension.