• Journal of The Korean Association For Science Education
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• v.27 no.5
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• pp.404-411
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• 2007

The purpose of this study was to examine the types of explanation about different experimental data on students' preconceptions on physical experiment. 45 students were selected from P University by examining their pre-test. The subjects had a scientific conception about a simple pendulum's period of movement, and expected that there was no change in the movement even when the mass of water increased in the can. The students were presented data about pendulum movement inside a can. They recorded this in a blank table and drew a graph about the movement of the pendulum. The responses of students were tested by presenting written anomalous experimental data. Students' recognition, trust about the anomalous data, cognitive conflict, belief change about their preconceptions were examined with written tests also. To measure students' cognitive conflict levels, CCLT (Cognitive Conflict Levels Test) developed in a previous study was used. Some students responded based on preconceptions and regarded the data as manufactured data or experimental error. The students who recognized the anomaly in the situation showed higher cognitive conflict levels than those who didn't recognize the anomaly in the situation. The students who changed their beliefs about preconceptions recognized the data as anomalous situations and showed high cognitive conflict levels than those who didn't abandon their preconceptions. The students who have unchanged beliefs about their preconceptions regarded the data as experimental error.

• Journal of the Korean Dietetic Association
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• v.17 no.3
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• pp.276-286
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• 2011

This study aimed to examine consumers' interest, preference, and consumption frequency of Kimchi in elementary school students in the fifth grade and their mothers living in Changwon city. In a comparison of eating habits, students exhibited better eating habits than their mothers (P<0.01). Though the mothers' levels, were higher than those of the students in the category of 'eat foods with a bit of salt usually', the students' levels were higher in the rest of the eating habit categories. The categories of 'like Kimchi', 'spicy taste', and 'appropriately spicy taste' got high levels. Among several kinds of Kimchi, both students and mothers preferred 'cabbage Kimchi' the most. Among various Kimchi foods, preferences for 'Kimchi pancake', 'fried rice with Kimchi', and 'tuna Kimchi soup', were highest in that order. The preferences differed between students and mothers in each category; mothers' preferences were significantly higher than those of students. However, in the rest of categories, except 'boiled kimchi and fish' and 'Kimchi and stir-fried spicy pork', students' preferences were higher than mothers' ones. Compared to their preferences, students' consumption frequencies were significantly higher than mothers' ones (P<0.01). There were positive correlations among students' eating habits, awareness of Kimchi, consumption frequency, and preference. For mothers, there were positive correlations not only between eating habits and awareness, but also between awareness and preference.

• The Mathematical Education
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• v.62 no.4
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• pp.457-471
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• 2023

Measurement is an imperative content area of early elementary mathematics, but it is reported that students' understanding of units in measurement situations is insufficient despite its importance. Therefore, this study examined lower-grade elementary students' quantitative reasoning of units in length measurement by identifying the levels of reasoning of units. For this purpose, we collected and analyzed the responses of second-grade elementary school students who engaged in a set of length measurement tasks using an open number line in terms of unitizing, iterating, and partitioning. As a result of the study, we categorized students' quantitative reasoning of unit levels into four levels: Iterating unit one, Iterating a given unit, Relating units, and Transforming units. The most prevalent level was Relating units, which is the level of recognizing relationships between units to measure length. Each level was illustrated with distinct features and examples of unit reasoning. Based on the results of this study, a personalized plan to the level of unit reasoning of students is required, and the need for additional guidance or the use of customized interventions for students with incomplete unit reasoning skills is necessary.

• Biomedical Science Letters
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• v.12 no.4
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• pp.371-374
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• 2006

This study was carried out to investigate the relationship of the cadmium and lead levels in blood by age, gender and smoking status among 181 students in Gyeongnam province from June 2005 to July 2006. The cadmium and lead levels in blood was analyzed by atomic absorption spectrophotometer. Subjects were classified for the investigation according to smoking status as smokers and nonsmokers, age and gender. Mean blood cadmium level in male and female was $1.65{\mu}g/dl,\;1.10{\mu}g/dl$ respectively. Male was significantly higher than that of female. Blood cadmium levels in heavy smokers ($11{\sim}20\;ea/day$) and light smokers ($1{\sim}10\;ea/day$) were $2.34{\mu}g/dl,\;1.10{\mu}g/dl$ respectively. Heavy smokers were significantly higher than those of light smokers. In the comparison of age, gender and smoking status in blood Lead levels were no significant differences. In conclusion, heavy smoking was the most significant risk factor to increase blood cadmium levels. The further study will need analysis of the other factors related to the elevation of the cadmium and lead levels.

• The Journal of Korean Academic Society of Nursing Education
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• v.18 no.2
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• pp.293-302
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• 2012

Purpose: The purpose of this study was to investigate nursing students' awareness and performance on standard precautions and to provide meaningful information for nursing students' education regarding hospital infection control. Method: Four hundred forty seven nursing students at 6 universities in D-city participated in this study. Data collection was conducted from March to April 2011. Students' awareness and performance on standard precautions of infection control in hospitals were measured using the modified 2007 CDC standard precautions guidelines. Data analysis was performed using the SPSS WIN 18.0 program, descriptive statistics, t-test, and ANOVA. Results: The level of students' awareness in the standard precautions was higher than performance. The higher levels of students' awareness and performance on standard precautions included patient care equipment, safe injection practices, and worker safety. The lower levels of students' awareness and performance on standard precautions included hand hygiene and personal protective equipment. There was no difference in the students' awareness and performance of standard precautions according to their characteristics. Conclusions: Based on the findings of this study, hand hygiene and personal protective equipment need to be stressed more within the program to improve nursing students' infection control techniques.

• Journal of Preventive Medicine and Public Health
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• v.51 no.1
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• pp.51-58
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• 2018

Objectives: Smoking is a significant public health issue in Bangladesh. The purpose of this study was to examine peer smoking and smoking-related beliefs among college students in Bangladesh. Methods: College students at two universities in Dhaka, Bangladesh participated in a self-administered survey in May and June 2017. Results: First, being a current or former smoker is associated with lower levels of beliefs among respondents that they would not smoke even with smoker friends or nervousness, and lower levels of intentions that they would not smoke, while current smokers and former smokers have different smoking-related beliefs. Second, having smoker friends is associated with lower levels of intentions that they would not smoke. Third, higher levels of normative beliefs that it is important not to smoke are associated with higher levels of beliefs that they would not smoke even with smoker friends or nervousness, higher levels of intentions that they would not smoke, and higher levels of avoidance of smoking. Conclusions: Smoking-related beliefs and perceived norms in individuals' social networks are important components in promoting tobacco cessation in Bangladesh. But it is challenging to prevent or intervene in smoking because of the high rates of smoking in this country and the high prevalence of smokers in individuals' social networks. Future studies should examine the most effective interventions to combat smoking in high-smoking social networks, such as using mobile apps or social media, and evaluate the effectiveness of such interventions.

• The Journal of the Korea Contents Association
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• v.21 no.7
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• pp.587-600
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• 2021

The aim of this research is to verify the mediating role of optimism and self-efficacy on the association between social support and depressive symptoms on among college students. 329 college students answered the survey questionnaires which assessed their social support, depressive symptoms, optimism, and self-efficacy. The results revealed that the higher levels of social support predicted the lower levels of depressive symptoms, the higher levels of optimism, and self-efficacy. In addition, the higher levels of optimism and self-efficacy predicted the lower levels of depressive symptoms. Lastly, the mediation analysis indicated that optimism and self-efficacy mediated the negative relationship between social support and depressive symptoms. That is, college students who highly perceived social support reported higher levels of optimism and self-efficacy, which led to lower levels of depressive symptoms. Finally, the implication and limitations of the present research were discussed and the directions for developing research were suggested.

• Human Ecology Research
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• v.55 no.5
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• pp.527-538
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• 2017

This study examines the effects of university students' types of self-determination and academic emotions on their learning community participant competence. The subjects were 234 early-childhood preservice teachers attending a university or college in the Kyonggi and Incheon area of Korea. The first metric created by Bak et al. (2005) measured early-childhood preservice teachers' types of self-determination. The second metric developed by Kim & Kim (2016) measured their levels of learning community participant competence. The thirds metric, originally developed by Kim (2012) and So (2010), was modified by Chung (2015) to measure the academic emotions of subjects. The test results were analyzed by correlation and multi-regression techniques using SPSS 21 for Windows. The findings were as follows. First, there were significant relationships between the subjects' types of self-determination and the levels of learning community participant competence. Second, there were significant relationships between the subjects' academic positive and negative emotions and the levels of learning community participant competence. Third, the subjects' levels of learning community participant competence were perceived differently according to their academic emotions. Based on these results, implications pertaining to academic emotions on learning community participant competence are suggested.

• Korean Journal of Community Nutrition
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• v.15 no.5
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• pp.687-693
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• 2010

This study investigated difference of general eating habit and eating-out behavior between men and women of university students in Gyonggi area. The survey was conducted from 1 March to 1 April 2010, in Gyeonggi area. Self-administered questionnaires were collected from 250 students in Gyeonggi area. The research results show, first of all, that they eat twice a day, and they usually do not eat breakfast. The main reason why they do not eat breakfast is that they do not have enough time to eat. Between men and women, there is significant difference in eating amount and eating speed at 0.001 levels. Men's problems of eating behavior are irregular meal time and speed of eating time, and in case of women, they do not have a meal regularly and overeat at one time. Second, they usually eat out for a meal and gather with friends once to three times a week. Also, the lunch set-menu promotion is the most preferred one. Third, when men choose a restaurant, they consider in order of taste, convenience, amount, and service; women consider in order of atmosphere, taste, convenience, and service. Taste is the most important for men; atmosphere is the most important consideration for women. Taste (at 0.01 levels), sanitation (at 0.05 levels), and atmosphere (at 0.001 levels) are significantly different between men and women in choosing restaurant.

• Journal of Family Relations
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• v.22 no.4
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• pp.157-179
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• 2018

Objectives: This study aimed to examine the relationship between Chinese adolescents' academic performance and smartphone overdependence as well as the moderating effects of parental involvement. Method: For this study, a survey was conducted with 472 adolescent students in three middle schools (n = 224) and three high schools (n = 248) in Shanghai, China. The survey consisted of the "S-Scale for Smartphone Addiction," the "Parental Involvement Scale," and questions regarding perceived academic performance using a demographic questionnaire. Results: The following are the major findings. First, after controlling for the students' demographic characteristics, hierarchical multiple regression analysis revealed that the students' perceived academic performance was negatively related to the levels of smartphone overdependence. Second, this study found significant moderation effects of parental involvement on the relationship between academic performance and smartphone overdependence. Chinese adolescents with low levels of perceived academic performance and high levels of perceived parental involvement showed high levels of smartphone overdependence. Finally, this study found significant moderation effects of parental involvement on the relationship between academic performance and smartphone overdependence only in middle-school students. Conclusions: These results indicate the need for healthy smartphone use and education and therapy programs for Chinese parents and adolescent children to prevent smartphone overdependence.