Predicting Adolescents’ Physical Activity in Physical Education using an Extended Theory of Planned Behavior

진주연(Joo yeon Jin),윤준구(Joon koo Yun) 학습자중심교과교육학회 2018 학습자중심교과교육연구 Vol.18 No.3

본연구의 목적은 중학교 체육수업에 참여하는 청소년의 신체활동의지와 신체활동량을 예측하기 위해 확장된 계획행동이론의 유용성을 검증 하는 것이다. 2011년도 가을, 서울과 경기도에 위치한 8개 중학교에서 모집된 553명의 중학생들이 연구에 참여하였다. 확장이론의 예측유용도와 (predictive utility: 가설 1) 목표의지와 신체활동 사이에서 실행의지의 매개효과 (medication effect: 가설 2)를 검증하기 위해 구조방정식이 사용되었다. 참가자의 태도, 사회적규범과 장애효능감은 목표의지를 유의미하게 예측했고 (R2=.68, p<.001), 실행의지와 임무효능감은 신체활동의 유의미한 예측요인이었다 (R2=.13, p<.001). 또한, 실행의지는 완벽하게 목표의지와 신체활동의 관계를 매개했다 (β=.12, p<.001). 전체적으로, 확장이론은 중학교 체육수업에서 학생들의 신체활동을 예측하는데 효과적인 것으로 나타났다. 후속 연구자들이 학교체육수업 참여하는 학생들의 신체활동증진을 위한 교수법을 개발할 때 본 확장이론에서 검증된 심리. 사회적 요인들을 고려해야 할 것으로 생각된다. The purpose of this study was to investigate the utility of an extended theory of planned behavior to predict physical activity (PA) intentions and behavior of adolescents in middle school physical education classes. A total of 553 students from 8 middle schools in Seoul and the suburbs of Korea participated in this study during fall of 2011. Structural equation modeling using robust maximum likelihood estimator was used to examine the predictive utility of the integrative model (hypothesis 1) and the mediation effect of implementation intention between goal intention and PA (hypothesis 2). Participants’ attitudes, subjective norms, and barrier-efficacy significantly predicted students’ goal intentions (R2=.68, p<.001), and their implementation intentions and task-efficacy were significant PA predictors (R2=.13, p<.001). In addition, implementation intentions completely mediated the relationship between goal intentions and PA (β=.12, p<.001). Findings suggest that the integrative model is useful to effectively predict adolescents’ PA in middle school physical education settings. Future studies should consider the psychosocial factors to effectively develop instructional strategies that promote adolescents’ PA in physical education classes.

Development and Evaluation of the Evidence-based Practice Instrument for Physical Educators Teaching Students with Disabilities

진주연(Joo Yeon Jin),윤준구(Joon Koo Yun) 한국체육측정평가학회 2014 한국체육측정평가학회지 Vol.16 No.2

본 연구의 목적은 범이론적 모델을 바탕으로, 장애 학생들에게 근거에 입각한 수업을 진행하기 위한 체육교사의 의 지와 교수법을 측정할 수 있는 측정도구를 개발하고 검증하는 데 있다. 미국 북서부 지역 초.중등학교에서 근무하는 148명의 체육교사들이 본 연구에 참여하였다. 범이론적 모델의 세 가지 개념(자기효능감, 의사결정균형, 변화과정)을 측정하는 문항들의 판별기능을 평가하기 위해 문항분석이 사용되었고, 그 이론적 구조는 확인요인분석을 통해 평가되 었다. 범이론적 모델의 핵심개념인 변화의 단계는 일원분산분석과 다변량분산분석을 사용하여 위의 세 개념들과 비교 되었다. 평가도구의 모든 항목들에 대한 문항판별값과 내적 일치도 값은 우수하거나 매우 우수하게 나타났고, 합당한 설명량(다중상관자승)과 요인적재치를 보였다. 범이론적 모델의 자기효능감, 의사결정균형, 변화과정 구조모형은 부분 적인 타당도가 수립되었다. 향후 본 측정도구의 타당도를 높이기 위해, 큰 표본을 이용한 교차검증법이 유망할 것이다. The purpose of this study was to develop and validate an instrument based on the Transtheoretical Model (TTM) for assessing physical educators’ intentions and teaching behavior to implement evidence-based practice for students with disabilities. Study participants were 148 physical education teachers who were recruited from both elementary and secondary schools in Northwest regions of the U.S. Item analysis was conducted to evaluate appropriate discriminate functions for items measuring three TTM constructs (self-efficacy [SE], decisional balance [DB], and processes of change [POC]). Internal structures of the TTM items were examined by confirmatory factor analyses. The responses from stage of change were compared to the three TTM constructs. Separate one-way analyses of variance and multiple analyses of variance on each construct by stage were conducted to assess differences among the stages of change. Item discrimination values for all items were good to very good, except for two negative DB items that were deleted. Internal consistencies of SE, DB, and POC were found to be good to excellent. Confirmatory factor analyses showed reasonable squared multiple correlation and factor loading estimates. Three structural models were partially supported by goodness of fit indices. Cross-validation with a large sample size will be desirable to refine this measurement system in the future studies.

C57BL6 마우스에서 복합생약제인 황금궁의 육모 효과

허진주(Jin Joo Hue),리란(Lan Li),유설혜(Sul Hye Lyu),백인정(In Jeoung Baek),연정민(Jung Min Yon),남상윤(Sang Yoon Nam),윤영원(Young Won Yun),황석연(Seock Yeon Hwang),홍진태(Jin Tae Hong),이범준(Beom Jun Lee) 대한약학회 2005 약학회지 Vol.49 No.6

Hwanggumgung (HGG) is a hair-care product which is composed of several plant extracts used in oriental medicine. This study was carried out to investigate effect of HGG on hair regrowth in a shaving model of C57BL6 mice. Five-week-old mice were acclimated for 1 week under 23±3℃, 50±10% relative humidity, and 12h of a light/dark cycle before beginning experiment. There were four experimental groups including distilled water (D.W., control), 10% ethanol (EtOH, vehicle control), a positive control of 3% minoxidil (MXD), and HGG for female and male mice, respectively. Six-weeks old mice were trimmed by electric clippers so as not to damage the skin. The next day, mice without visible scraches were selected, randomized and separated in groups of 11 mice. The test compounds were topically treated with 0.15㎖ per mouse per day for 21 days. The hair regrowth was photographically and histologically determined during the experimental period of 21 days. Enzyme activities of γ-glutamyl transpeptidase and alkaline phosphatase were also determined using a rate assay method. There were no clinical signs in all experimental groups. The topical application of 3% MXD and HGG in female mice promoted hair regrowth earlier and faster than the control groups. In male mice, the topical application of 3% MXD and HGG also accelerated hair growth compared with the controls. Ten percent ethanol also promoted hair growth faster than D.W group. The histology of hair growth in experimental groups was strongly associated with the hair regrowth. 3% MXD and HGG promoted elongation of hair follicles compared with the controls in both female and male mice. Activities of alkaline phosphatase and γ-glutamyl transpeptidase, enzymes related to hair growth, significantly increased after treatments of 3% MXD and HGG for 2 weeks in both female and male mice (p<0.05). These results suggest that HGG has hair growth promoting activities and it can be for treatment for alopecia.

Bacillus subtillis처리에 따른 레몬밤과 강낭콩의 생육

장매희(Mae-Hee Chiang),송은경(Eun-Kyoung Song),우정연(Jun-Yeon Woo),설진주(Jin-Joo Seul),이찬주(Chan-Joo Lee),신은경(Eun-Kyoung Shin) 한국원예학회 2017 한국원예학회 학술발표요지 Vol.2017 No.5

유기인제에 의한 뇌 손상에 있어서 흥분성 아미노산의 역할

김동식,이봉희,이영재,김소미,김대성,이경갑,조문제,고봉우,박은혜,방성현,진주연,주창완,류기증,박민경 한국농화학회 2001 Applied Biological Chemistry (Appl Biol Chem) Vol.44 No.3

This study investigated the role of excitatory amino acid systems in the initiation of organophosphate-induced seizures and brain damages in rats through quantitative in viva microdialysis. Microdialysates were collected from the hippocampus of rat brain, treated with diisopropylfluorophosphate (DFP; 2.67 ㎎/㎏, s.c.) alone, and/or atropine sulfate (15 ㎎/㎏, i.m.) and procyclidine (30 ㎎/㎏, i.m.). The protective effects of atropine, a muscarinic blacker, and/or procyclidine, a N-methyl-D-aspartate and cholinergic antagonist, against DFP were examined. DFP treatment increased the levels of aspartate (Asp) and glutamate (Glu) significantly in the hippocampal persuate with the induction of seizures. Treatment of procyclidine could effectively block the increase of Asp and Glu levels. Atropine treatment showed no significant anticonvulsive effects against DFP-induced seizures. The increases of Asp and Glu levels by DFP were also completely blocked through the combined treatment of atropine and procyclidine. Histopathological findings on the hippocampus confirmed the above results. More effective protection was observed through the treatments of procyclidine alone or of both procyclidine and atropine than atropine alone against DFP-induced brain damage. Procyclidine was shown to be effective in DFP-induced seizures.