Construction sites have gradually become bigger and bigger according to Korea economic growth. Also use of tower crane and other heavy equipment has been increased. The increased use of heavy equipment like tower crane is leading to fatality incident. This study will verify hazards to influence tower crane incident through structural and positive verification and find which hazard influence incident risk. The result of this study is as follows. First, while there is a significant difference between safety managers and tower crane operators for working environment, safety management, personal manage among risk factors, we can not find any evidence on the difference in perception of tower crane incident risk between them. Second, task manage risk and personal manage risk has a significant positive effect on perception of tower crane incident risk. Third, while site environment risk has a significant positive moderating effect of task type between risk factors and perception of tower crane incident risk, personal environment risk has a significant negative moderating effect between them.

This paper examines whether and how L2 learners’ reading strategies vary depending on the task type or on the measure of eliciting strategy use. Participants were 28 college students in a Korean university. Two reading tasks (i.e., reading for comprehension vs. reading for summarizing) and three measures of strategy use (i.e., pre-reading strategy survey, while-reading think aloud, and post-reading strategy check list) were employed to answer the posed research questions. The researcher’s observation of the participants’ thinking-aloud and a post-task interview were also implemented for data triangulation. All the participants completed two tasks based on two texts (one for each) selected from the same chapter in a book that were considered equivalent in length, readability, and topic. The results revealed that the number of reading strategies reported decreased dramatically in the order of strategy survey, strategy check list, and think aloud. Significantly more frequent use of reading strategy was found in reading for comprehension than in reading for summarizing, large portion of which was devoted to bottom-up style decoding, while in reading for summarizing the students approached the text with more focused attention caring about propositional connections at discourse level. Some other findings are presented along with implications for reading research and for L2 reading instruction.

The purpose of this study was to assess the effect of visual block (eyes open or closed), mental task type, and participation in an exercise program on static balance in the elderly. The subjects were 34 elderly (>65 years old) residents of a social welfare institute in Gyeonggi-do. We measured the following variables. Berg balance scale, mini mental state examination, balance performance monitor (sway area, path, and maximal sway velocity), age, weight, height and whether the subject participated in an exercise program. Scores for the Berg balance scale and mini mental state examination were evaluated to assess static balance ability either alone (single task paradigm) or while performing a mental task (dual task paradigm). Static balance variables that were measured included sway area, path, and maximal sway velocity. Each test was repeated three times. Multiple regressions analysis was used to examine the effect of each variable on static balance ability. For the dual task paradigm, static balance was affected by whether the subject participated in an exercise program. The Berg balance scale score for subjects with their eyes open was affected by whether they participated in an exercise program, while this variable in addition to the height and weight of subjects were determining variables in subjects with their eyes closed. As a result, whether subjects participated in an exercise program affected their static balance irrespective of whether their eyes open or closed. Therefore, regular exercise is recommended for elderly people and further research is needed to examine the relationship between static and dynamic balance while performing mental tasks such as cognition and attention.

목적: 본 연구는 시지각 운동 적응과제 시 피드백 제공 방법에 따른 학습효과의 차이를 규명하고자 한다. 방법: 참여자 41명은 제시되는 피드백 형태에 따라 4집단(A, C, D 집단:10명, B집단:11명)으로 나뉘어 시지각 적응 운 동(팔 뻗기)과제를 수행하였다. 실험 1일차에 모든 참여자는 가상현실 상황 속에서 기준선 검사(baseline)와 시각적 왜곡을 극복하는 두 구간의 적응훈련(adaptation), 그리고 탈적응(washout)을 마쳤다. 그리고 약 24시간 뒤 모든 참여자에 대한 파지검사(retention)를 시행하였다. 수행의 공간 정확성을 평가하기 위해 각 구간의 실제 움직인 수행 궤적과 시작지점-목표지점을 연결한 목표 궤적 사이의 거리오차(distance error)를 산출하였다. 결과: 모든 집단은 적응 1구간과 2구간을 거치며 시각 피드백의 유무와 상관없이 운동 횟수가 증가함에 따라 수행의 공간 정확성은 향상되었으며 특히, 집단 D(운동감각-시각 순)가 가장 큰 수행 향상을 보였다. 파지 검사에서는 단일 피드백 집단 A, B와 다중 피드백 집단C, D 간의 유의한 차이가 나타났다. 결론: 이러한 연구결과는 시지각 운동 적응과 제 학습에 있어 모든 감각 피드백의 제공은 수행 향상에 효과를 보이며, 특히 파지검사에서는 단일 피드백 구조일 때 높은 잔존효과를 보이며 학습 효과가 나타났다. 따라서, 이 실험에서 제공된 피드백 종류나 구조와 관계없이 수행의 향상은 이루어질 수 있고, 특정한 피드백 제공 구조는 수행의 향상에 미치는 영향이 더 클 것으로 보인다.

본 연구의 목적은 성별, 시-지각, 개방-기술 경험, 과제의 유형, 시각적 자극 속도가 동시적-예측 타이밍에 미치는 효과를 결정하는 것이었다. 15명의 남성과 여성이 바이옵터 시-지각 검사를 이용한 6가지 시-지각 검사와 개방기술 활동 검사지를 작성한 후에 베이신 예측 타이머를 이용하여 3가지의 서로 다른 시각적 자극 속도 조건에서 단추누르기 과제와 타격 과제에 대한 50회의 동시적 예측 타이밍 과제를 수행하였다. 그 결과 시-지각 능력과 개방기술 경험에서 남성과 여성 간의 유의한 차이가 없어, 이러한 변수들은 동시적 예측 타이밍 과제의 수행에서의 남녀차이를 설명하지 못하였다. 단추누르기 과제보다 타격 과제의 수행에서 정확성과 일관성이 높게 나타났다. 이에 대한 이론적 설명이 논의되었다.