Book reviews

The purpose of this study was to find out: (a) pupils' attitudes towards open-ended science investigations, and (b) the problems that pupils encounter when carrying out such investigations in groups. The study was conducted in a class of 39 primary 6 pupils of mixed ability who carried out four investigations. Data were based on pupils' responses on an attitude survey questionnaire, interviews, video tapes of pupils performing the investigations and field notes. The majority of the pupils liked conducting such investigations. Reasons for positive responses were that the pupils had the freedom to explore and devise their own procedures to find out things that they wanted to know about, they could work together and discuss with friends, the investigations were interesting and it was a valuable learning experience. Reasons for negative responses included the difficulty of coming up with good ideas to design the investigations, and group conflicts. The findings also indicate that group dynamics played an important role in influencing pupils' attitudes towards the investigations.     

论社会资本——以周寿臣与晚清留美幼童为例

作为一种深具影响力的分析框架,社会资本理论近年来被研究者广泛运用.与肉眼能见、易于计算的经济资本不同,像人际关系、商业网络或社会联系之类的社会资本,则既抽象又不易被人察觉.虽然如此,社会资本有助于强化彼此合作,或是可以减低交易成本的作用却十分明显.周寿臣和晚清留美幼童之间的紧密联系,正好说明社会资本的建立、积累、深化和传递,让人看到资本在某些关键时刻或特殊事件上所发挥的巨大作用.其中三个层面或例子可以作为说明:(一)1881年,当周寿臣因未事先知会上司而擅自离开天津后被上海道台扣押时,如无留美幼童的及时援救,他应不可能摆脱牢狱之灾,更不可能获得转赴当时仍属清朝藩属的朝鲜任事的较好工作机会.(二)1881-1894年在朝鲜任职期间,周寿臣与其他留美幼童合作无间,协助袁世凯有效管治朝鲜大小事务,令袁氏印象深刻.到袁世凯大权在握时,周寿臣和幼童们自然深受器重与信任,获委以要职.(三)退休返乡后,周寿臣仍与留美幼童们保持紧密联系,无论大小事务,每当有需要时总会给予大力协助.     

Posing Problems for Open Investigations: What questions do pupils ask?

The purpose of this study was to (a) find out the types of questions that pupils ask for open-ended science investigations, and (b) discuss how teachers can help pupils to identify problems and pose questions that are feasible for investigations. The study was conducted in a class of 39 primary 6 pupils of mixed ability. The pupils wrote down questions for two investigations that they would like to work on. The questions for the first investigation were generated individually, but those for the second investigation were posed in groups after the pupils were shown some examples of investigable questions. Among the questions that were posed individually, only 11.7% could be answered by performing hands-on investigations. Most of the questions asked were based on general knowledge and covered a wide range of topics. However, when questions were generated in groups after examples were shown, there was a significant increase in the number of questions that were amenable to science investigations (71.4%) but they related to fewer topics. A typology of investigable and non-investigable questions is proposed. Suggestions on how teachers can help pupils to pose problems and questions that are feasible for investigations are given.     

Construction and Validation of a Chinese Value of Learning Scale (CVLS)

The Chinese Value of Learning Scale (CVLS) is a 5-item instrument for assessing the value of learning in Chinese culture. The psychometric properties of CVLS were investigated in a convenient sample of 583 Chinese soon-to-be-aged adults in Hong Kong. CVLS possesses high internal consistency and exhibited satisfactory short-term test-retest reliability. CVLS also exhibited high face validity and mild convergent validity with other 48-item openness-to-experience scale (OTES) from Revised NEO Personality Inventory, and is significantly related to the past and actual learning experience. In view of its brevity and easy administration, CVLS offers a useful instrument to further investigate the value of learning in Chinese culture and its possible relationship with adults' learning behaviour.     

Ventilatory acclimatisation is beneficial for high-intensity exercise at altitude in elite cyclists

Aim: The aim of this study was to examine the relationship between ventilatory adaptation and performance during altitude training at 2700?m. Methods: Seven elite cyclists (age: 21.2?±?1.1?yr, body mass: 69.9?±?5.6?kg, height 176.3?±?4.9?cm) participated in this study. A hypoxic ventilatory response (HVR) test and a submaximal exercise test were performed at sea level prior to the training camp and again after 15 d at altitude (ALT15). Ventilation (V_E), end-tidal carbon-dioxide partial pressure (P_ETCO₂) and oxyhaemoglobin saturation via pulse oximetry (SpO₂) were measured at rest and during submaximal cycling at 250?W. A hill climb (HC) performance test was conducted at sea level and after 14 d at altitude (ALT14) using a road of similar length (5.5–6?km) and gradient (4.8–5.3%). Power output was measured using SRM cranks. Average HC power at ALT14 was normalised to sea level power (HC%). Multiple regression was used to identify significant predictors of performance at altitude. Results: At ALT15, there was a significant increase in resting V_E (10.3?±?1.9 vs. 12.2?±?2.4?L·min^?1) and HVR (0.34?±?0.24 vs. 0.71?±?0.49?L·min^?1·%^?1), while P_ETCO₂ (38.4?±?2.3 vs. 32.1?±?3.3?mmHg) and SpO₂ (97.9?±?0.7 vs. 94.0?±?1.7%) were reduced (P?V_E at altitude as significant predictors of HC% (adjusted r²?=?0.913; P?=?0.003). Conclusions: Ventilatory acclimatisation occurred during a 2 wk altitude training camp in elite cyclists and a higher HVR was associated with better performance at altitude, relative to sea level. These results suggest that ventilatory acclimatisation is beneficial for cycling performance at altitude.     

Learn to Do by Doing and Observing: Exploring Early Childhood Educators′ Personal Behaviours as a Mechanism for Developing Physical Literacy Among Preschool Aged Children

Early Childhood Education Journal - The aim of this integrative review was to provide a synthesis of existing evidence on the impact of early childhood educators’ (ECEs) personal health and...     

Exploring the relationships between collective efficacy,perceptions of success,and team attributions

Abstract

We examined the influence of collective efficacy and subjective interpretations of success/failure on team causal attributions. The participants were 71 male and female high school athletes on 20 track relay teams. Before a selected competition, participants completed a collective efficacy questionnaire. Then, immediately after their race, they were administered a modified version of the revised Causal Dimension Scale-II. A multi-level framework was employed to assess collective efficacy as an individually held perception and as a shared team belief. The individual perceptions of team success/failure significantly predicted the locus of causality and stability dimensions, whereas aggregated collective efficacy emerged as a significant team level predictor of average stability. Individual perceptions of collective efficacy were significantly related to team control and this relationship was moderated by the sex of the team. The findings indicate that collective efficacy beliefs held by athletes and teams prior to a competition influence the formation of post-competition team attributions in sport.     

Effects of an acute bout of exercise on serum soluble leptin receptor (sOB-R) levels

Abstract

We investigated the effects of an acute bout of exercise on serum soluble leptin receptor (sOB-R) concentrations. Eighteen male participants completed two different exercise sessions with intensities of 25% and 65% maximal aerobic capacity (VO₂max). In addition to the energy expenditure during exercise sessions being measured, blood samples were collected before exercise, and immediately, at 24 h, and at 48 h post-exercise to analyse sOB-R, leptin and insulin levels. At 24 h post-exercise, sOB-R and leptin concentrations at the 65% VO₂max were significantly different from those at the 25% VO₂max. Leptin levels at 48 h post-exercise were also significantly lower for the 65% VO₂max than for the 25% VO₂max (P < 0.01). In the 65% VO₂max session, the energy expenditure during exercise was significantly associated with leptin concentrations at 24 h and 48 h and sOB-R concentrations at 24 h post-exercise. However, no correlations were found between sOB-R and leptin at the three post-exercise time points. In conclusion, an acute bout of exercise with 920 kcal of output resulted in an increase in sOB-R levels at 24 h post-exercise. However, the changes in sOB-R levels due to an acute bout of exercise might not contribute to the delayed decrease observed for leptin.