Predictors of well‐structured and ill‐structured problem solving in an astronomy simulation

This study compared the problem‐solving skills required for solving well‐structured problems and ill‐structured problems in the context of an open‐ended, multimedia problem‐solving environment in astronomy. Two sets of open‐ended questions assessed students' abilities for solving well‐structured and ill‐structured problems. Generalized, rubric scoring systems were developed for assessing problem‐solving skills. Instruments were also developed and administered to assess cognitive and affective predictors of problem‐solving performance. By regressing the scores on the cognitive and affective predictors onto students' scores on the well‐structured and ill‐structured problems, we concluded that solving well‐structured and ill‐structured problems require different component skills. Domain knowledge and justification skills were significant predictors of well‐structured problem‐solving scores, whereas ill‐structured problem‐solving scores were significantly predicted by domain knowledge, justification skills, science attitudes, and regulation of cognition. Implications for problem solving in science education are presented. © 2003 Wiley Periodicals, Inc. J Res Sci Teach 40: 6–33, 2003     

Heterogeneous Effects of Charter Schools: Unpacking Family Selection and Achievement Growth in Los Angeles

Disparate findings on whether students attending charter schools outperform peers in traditional public schools (TPS) may stem from mixing differing types of charters or inadequately accounting for pupil background. To gauge prior family selection and heterogeneous effects, we distinguish between conversion and start-up charter schools, along with a third site-run model operating in the Los Angeles Unified School District (LAUSD). We find that TPS campuses converting to charter status (conversions) attracted more experienced and consistently credentialed teachers, and served relatively advantaged families, compared with newly created charter schools (start-ups), after tracking 66,000 students over 4 years, 2007–2011. Charters overall attracted pupils achieving at higher levels as they began a grade cycle (at baseline), relative to TPS peers, most pronounced among conversions that remained affiliated with the district. After matching students on their propensities to enter a charter school, we find that pupils attending charters outperformed TPS peers over the 4-year period. These benefits are most consistent and moderate in magnitude for middle school students. We observed significant though small effects in English language arts for pupils attending charter high schools. Latino students, mostly attending start-ups, enjoyed consistent benefits from attending a charter school.     

Negative thinking versus positive thinking in a Singaporean student sample: Relationships with psychological well-being and psychological maladjustment

This study examines the relationships of positive thinking versus negative thinking with psychological well-being and psychological maladjustment. Three hundred and ninety-eight undergraduate students from Singapore participated in this study. First, positive thinking were positively correlated with indicators psychological well-being – life satisfaction and happiness, and negatively correlated with indicators of psychopathology – stress, anxiety, depression, and anger. In contrast, negative thinking were positively correlated with indicators of psychopathology – stress, anxiety, depression, and anger, and negatively correlated with indicators of psychological well-being – life satisfaction and happiness. Second, hierarchical multiple regression results showed that females were more likely than males to be stressed and anxious at the first step of entry. However, there were no significant differences between the sexes in terms of depression, anger, life satisfaction, and happiness. Age did not significantly predict any of the criterion variables. Third, hierarchical multiple regression results showed that negative thinking accounted for more of the significant incremental unique variance in depression, stress, anxiety, life satisfaction, anger, and happiness in order of effect size. This is also found that positive thinking do accounted for a sizable significant incremental unique variance in happiness and life satisfaction, while a very small percentage of 1% significant incremental unique variance for stress, depression, anxiety, and anger. Implications and limitations of these findings were discussed.     

Environmental Education Course Development for Preservice Secondary School Science Teachers in the Republic of Korea

Abstract

In Summer 1996, an opinionnaire survey was used to evaluate the opinions of Korean professors, in earth science education and geology departments, about the science concepts related to environmental issues that might be important for secondary preservice earth science teachers in the Republic of Korea. The opinionnaire contained 63 items within the 14 major topics being considered. It used a 4-choice, Likert-type scale and was completed by 47 professors (response rate = 51%). There was a good coincidence in opinions on major topics to be included. Respondents favored an environmental earth science course that emphasized the “human impact on the environment” rather than “natural environmental hazards.” Also, they favored study of natural hazards that commonly occur in Korea within a context of worldwide natural hazards.     

End-of-Life Decision Making in Older Korean Adults: Concerns,Preferences, and Expectations

This study explored Korean older adults’ concerns and preferences regarding end-of-life care and the expected role of physicians in the decision making process. The purpose was to assist health care professionals, in particular, physicians, to better understand how to interact with Korean older adults. A qualitative method using in-person interviews was conducted with Korean older adults (N = 54). The seven main themes generated in this study included the following: (a) life-sustaining treatments and hope for quality of life; (b) physician expert status; (c) truth telling and ethics; (d) preferred way to disclose bad news; (e) physician's role to treat, (f) potential misuse of life-sustaining treatments; and (g) priority of patients’ preferences. Overall, study participants generally anticipated a larger role for physicians in their own end-of-life decision making, though some expressed concerns about the outcome of giving such power to physicians, especially in agreeing to life-sustaining treatments. Although culture provides one important clue about expectations, it is always crucial for health care providers to ask about individual preferences and to develop an open communication style to decrease distress. Our findings highlight the importance of understanding concerns and preferences regarding end-of-life care among Korean older adults and the importance of assisting them in planning end-of-life care within a cultural framework.     

Students’ perceptions of parental bonding styles and their academic burnout

This study investigated how parental bonding style affects academic burnout in Korean adolescents. Participants were 447 middle school students, who completed the Parental Bonding Instrument and the Maslach Burnout Inventory-Student Survey. MANCOVA results confirmed that adolescents reporting the optimal bonding parental style, for both mother and father, have lower scores on three subscales of academic burnout (Exhaustion, Cynicism, and Inefficacy) than do their counterparts who report the affectionless control parental style. We discuss the possible implications for reducing students?? academic burnout rates.     

Connectedness of Korean adolescents: profiles and influencing factors

The purpose of the present study was to identify profiles of Korean adolescent connectedness across multiple contexts (e.g., family, school, neighborhood, etc.), using cluster analysis. In addition, this study examined how the profiles of Korean adolescent connectedness are discriminated by demographic and adjustment-related variables. Data were collected from 538 Korean adolescents aged 13?C19. Participants completed a Korean version of Measure of Adolescent Connectedness (MAC-K). Results from a cluster analysis revealed three profiles of connectedness to parents, siblings, teachers, school, friends, and neighborhood. Results placed participants into categories of Well-connected, Disconnected, and Socially connected. The first two profiles were characterized by reports of either strong or weak connectedness to all contexts. The last profile is characterized by reports of strong connections only to friends and neighborhood. The results also indicated that adolescents?? school adjustment, problem behaviors, self-esteem, and gender were significant discriminators between the three profiles. Implications for counseling practice and future studies are discussed.     

Multi-postpath-based lookahead multiconstraint QoS routing

Multiconstraint QoS (quality of service) routing is an essential mechanism for QoS-guaranteed services. Unfortunately, the multiconstraint QoS routing problem is NP-complete. In this paper, we propose a heuristic multiconstraint QoS routing scheme, MPLMR (multi-postpath-based lookahead multiconstraint routing). MPLMR is a routing scheme using an extended shortest-path algorithm. As in previous schemes such as TAMCRA and H_MCOP, MPLMR stores a limited number of subpaths between the source node and each intermediate node, and extends these subpaths toward the destination node. However, MPLMR uses an improved “lookahead” method to estimate the path length of the full path to which each subpath is extended. MPLMR then selects and stores the subpaths that have higher likelihood than other subpaths to be extended to feasible paths. We show via simulation that MPLMR has a smaller probability of missing a feasible path than competing schemes in the literature.     

Curriculum-Based Measurement in the Content Areas: Validity of Vocabulary-Matching as an Indicator of Performance in Social Studies

In this study, we examined the reliability and validity of two curriculum-based measures as indicators of performance in a content-area classroom. Participants were 58 students in a 7th-grade social studies class. CBM measures were student- and administrator-read vocabulary-matching probes. Criterion measures were knowledge pre- and post-tests, the social studies subtest of the Iowa Test of Basic Skills, and student grades. Results revealed moderate alternate-form reliability for both vocabulary-matching measures. Reliability of the measures was increased by combining scores across two testing sessions. Correlations between the predictor and criterion variables were moderate to moderately strong, with the exception of those between vocabulary-matching and student grades. Observed scores for students with LD were lower than for students without LD on both student- and administrator-read vocabulary-matching measures. Few differences in reliability and validity coefficients were found between the student- and administrator-read measures. Results are discussed in terms of the use of CBM as a system for monitoring performance and designing interventions for students with learning disabilities in content-area classrooms.     

应用灰色关联度对影响我省1997年体育高考素质总分的因素分析

采用灰色关联度分析法,对我省769位体育高考生的四个单项得分与素质总分之间的关系进行分析研究。研究结果表明有效提高素质测试的成绩应以发展腿部爆发力为重点,各项训练比重男女区别对待,从而为科学训练,有效地提高高考体育测试的成绩提供依据。