Astronomy alternative conceptions in pre-adolescent students in Western Australia

ABSTRACT

Alternative conceptions in astronomy are a road block to new learning. Astronomy content is included in the Australian Curriculum (AC) from Year 3 and then intermittently in Year 5, Year 7 and Year 10. In accepting that science is socio-culturally constructed, it is important for teachers to have a clear understanding of the alternative conceptions that students bring with them to the science classroom. This article reports on the alternative conceptions elicited from 546 students ranging from Year 5 through Year 7 using a modified form of the Astronomy Diagnostic Test [Danaia, L. (2006). Students’ experiences, perceptions and performance in junior secondary school science: An intervention study involving a remote telescope (Doctoral dissertation). Charles Sturt University, Bathurst]. Results show that some well identified alternative conceptions, such as the ‘eclipse model’ to explain the phases of the Moon, exist before students enter high school and prior to any formal learning on the topic. In addition, this research identified a number of alternative conceptions held by pre-adolescent students in Western Australia that were based on knowledge that should have been consolidated by students in Year 3, viz., the relative movements of the Earth, Moon and Sun. Armed with students’ alternative conceptions as a part of their pedagogical content knowledge, teachers can construct active learning experiences that will challenge students’ existing constructs in order to allow for new learning. This sample suggests that we need to identify the reasons behind the lack of consolidation of the foundation astronomy content of the Australian Curriculum outlined for students in Year 3.     

Increased fruit and vegetable intake among older adults participating in Kentucky’s congregate meal site program

ABSTRACT

The purpose of this study was to determine if the amount and variety of fruits and vegetables consumed increased among community-dwelling older adults participating in Kentucky’s congregate meal site program following a series of five nutrition education lessons. A convenience sample of older adults attending senior centers (n = 35)—two intervention (n = 19) and two control (n = 16) centers—participated in this quasi-experimental pilot study. Following the intervention there was a significant increase in actual fruit and vegetable intake in the intervention group (p < .05) as assessed by platewaste measurements of the congregate lunch meal. In addition, from pre- to post-intervention, a trend towards increased self-reported intake in the variety of fruit and vegetables was observed among the intervention group. As well, a significant increase in the number of days intervention participants self-reported consuming at least 4.5 cups of fruits and vegetables in the last 7 days (2.44 ± 2.09 days to 4.28 ± 1.99 days (p = .004)) was observed; and knowledge pertaining to phytochemicals increased (p < .05). The phytochemical index (PI) score of the lunch meal, taking into account that the older adults' consumption of meal components, including phytochemical-rich foods, was 26.9. Overall, study results indicated that a short theory-based nutrition education program offered to community-dwelling older adults was linked to an increase in fruit and vegetable consumption and phytochemical knowledge.     

A structural model of algebra achievement: computational fluency and spatial visualisation as mediators of the effect of working memory on algebra achievement

The goal of this study was to develop and evaluate a structural model of the relations among cognitive abilities and arithmetic skills and college students’ algebra achievement. The model of algebra achievement was compared to a model of performance on the Scholastic Assessment in Mathematics (SAT‐M) to determine whether the pattern of relations is similar for different types of higher level maths achievement. Structural equation modelling was used to test the effects of working memory, 3D spatial ability, and computational fluency on both types of higher order maths achievement. Computational fluency had the strongest effect on algebra achievement, with 3D spatial ability and working memory showing moderate effects. In contrast, 3D spatial ability had a stronger effect on SAT‐M scores than did computational fluency. Computational fluency and 3D spatial ability completely mediated the effect of working memory for both algebra and SAT‐M achievement.     

Sexual Assault Is Just the Tip of the Iceberg: Relationship and Sexual Violence Prevalence in College Students

With the advent of the “Dear Colleague” letter in 2011, higher education institutions have become focused on sexual assault and related policies, procedures regarding offenses, and prevention education. Institutions should consider using this spotlight on interpersonal dynamics to increase awareness about other types of relationship violence that may be more common. This secondary data analysis of 72,067 U.S. college students indicates stalking, emotional abuse, and physical abuse are very common. Along with relationship difficulties in general, these forms of relational violence occur more frequently than sexual assault. Implications for counseling and mental health services are provided.     

Physiological implications of preparing for a natural male bodybuilding competition

This study aimed to describe the body composition and physiological changes which take place during the in-season and recovery periods of a group of natural bodybuilders. Natural male bodybuilders (n?=?9) were assessed 16 (PRE16), 8 (PRE8), and 1 (PRE1) week(s) before, and 4 (POST4) weeks after a bodybuilding competition. Assessments included body composition, resting metabolic rate (RMR), serum hormones, and 7-day weighed food and training diaries. Change in parameters was assessed using repeated-measures analysis of variance. Dietary protein intake remained high throughout the study period (2.8–3.1?g?kg^?1?d^?1). Fat mass (FM) was significantly reduced from PRE16 to PRE1 (8.8?±?3.1 vs. 5.3?±?2.4?kg, P?.01). There was a small decrease in lean mass (LM) from PRE8 to PRE1 (71.8?±?9.1 vs. 70.9?±?9.1?kg, P?P?>?.05). Large reductions in total and free testosterone (16.4?±?4.4 vs. 10.1?±?3.6?nmol?L^?1, P?. 116.8?±?76.9?pmol?L^?1, P?. 19.9?±?7.6?nmol?L^?1, P?. 72.5?±?8.5?kg, P?. 25.4?±?9.3?nmol?L^?1, P?相似文献   

Singing it for “us”: Team passion displayed during national anthems is associated with subsequent success

The present research examined the link between passion displayed by team members during the singing of national anthems at UEFA Euro 2016 and team performance in the tournaments’ 51 games. Drawing on social identity theorising, we hypothesised a positive relationship between passion and performance. Consistent with this hypothesis, results showed that teams that sang national anthems with greater passion went on to concede fewer goals. Moreover, results provided evidence that the impact of passion on the likelihood of winning a game depended on the stage of the competition: in the knockout stage (but not the group stage) greater passion was associated with a greater likelihood of victory. Extending recent reviews that highlight the importance of social identity processes in sporting contexts, these results suggest that team members’ identity-based expression of passion for the collective can be an important predictor of subsequent performance.     

Portfolios in First Grade: Four Teachers Learn to Use Alternative Assessment

Educational assessment is experiencing significant changes which affect classroom practices. This article describes an in-depth qualitative study of the implementation of portfolio assessment by four first grade teachers. Creative activities and valuable insights were given by these teachers which allow for successful implementation of portfolios in the classroom. These teachers found three major benefits of portfolios: (1) a means of communicating more effectively with families, (2) a tool to motivate, encourage, and instruct students in the skills of self-assessment, and (3) a mechanism to monitor and improve their own instruction in the classroom.     

Differential ability scales: Profiles of preschoolers with cognitive delay

This study examined the cluster profiles obtained using the Differential Ability Scale (DAS, Elliott, 1990a) for preschool children diagnosed with cognitive delay and for those without cognitive delay. Cluster analyses resulted in distinctive profiles for each group. Profiles for preschoolers diagnosed with cognitive delay were compared with DAS profile patterns previously reported for school‐aged children diagnosed with learning disabilities (McIntosh & Gridley, 1993). Cluster comparisons indicated profiles of cognitively delayed preschoolers were not the same as those found in school‐age children with learning disabilities. Implications for prediction of school‐age learning disabilities from preschool DAS cognitive cluster profiles are discussed. © 2002 John Wiley & Sons, Inc.     

A synthesis of evaluations of distance education courses

Distance education courses are offered in a wide variety of formats. A range of media is available, and mechanisms for and levels of study and administrative support vary widely between courses. When new courses are established there is a wealth of experience to draw upon but little, if any, guidance on how to choose between the plethora of potential course formats. This article suggests that synthesising guidelines from evaluations of a selection of courses can help in drawing conclusions as to how courses are best formatted for given situations. As a case study, seven Hong Kong distance education courses with a variety of features were evaluated. Conclusions were synthesized—about the provision of tutorials, group activities, inter-student contact, telephone counselling and the use of video and television broadcasting—which could not have been reached from either evaluating one course alone or by examining existing literature.