Effect of intersolution interval,chlordiazepoxide, and amphetamine on anticipatory contrast

Previous experiments have shown that the intake of a 0.15% saccharin solution is suppressed if saccharin access is followed by access to 32 % sucrose in brief daily pairings. The present experiments found that: (1) the degree of suppression was not altered when no time elapsed between presentation of the two solutions each day (15 sec had been the minimum in previous experiments and was used as the control in this experiment); (2) the degree of suppression was not altered by chlordiazepoxide (6, 12, or 20 mg/kg), although the drug had large appetite-stimulating effects; (3) suppression was not influenced by amphetamine (0.25 or 0.50 mg/kg); and (4) contrast could be established or eliminated, even after extended training, by manipulating the sequences of solutions presented (saccharin-saccharin or saccharin-sucrose). The results were interpreted in terms of a contrast effect based on the learned anticipation of a preferred substance. The chlordiazepoxide data suggest that this contrast is different from successive negative contrast, and the intersolution interval data suggest that the occurrence of contrast rather than a reinforcement effect is not due to a time gap between presentations of the two solutions.     

The acceptance of computer technology by teachers in early childhood education

This study investigated kindergarten teachers’ decision-making process regarding the acceptance of computer technology. We incorporated the Technology Acceptance Model framework, in addition to computer self-efficacy, subjective norm, and personal innovativeness in education technology as external variables. The data were obtained from 160 kindergarten teachers, from public kindergartens in Daejeon, South Korea. According to the results, subjective norm had the strongest effect on computer acceptance. In addition, perceived usefulness and computer self-efficacy had a direct effect on computer technology acceptance. On the other hand, perceived ease of use and personal innovativeness in education technology had an indirect effect on computer technology acceptance. The measures accounted for approximately 32% of the variance of intentions to use computers in kindergartens.     

Young Children's Exposure to Mathematics: The Child Care Context

Four preschool teachers from two preschool settings were observed to explore the contribution of child care experiences on the development of young children's understanding of mathematics. Teachers were also interviewed regarding their attitudes and beliefs about the importance of early education, children's understanding of mathematics prior to formal schooling, and their role in facilitating mathematical knowledge. Although the programs and teachers differed in terms of program orientation, teaching style, student participation, and interactions with students, the programs did not differ in terms of the amount or content of mathematics presented to children. During the classroom observations that were conducted, very little mathematics was presented in any of the classrooms either directly or indirectly to students. In contrast, teachers said that they believed that mathematics was important and that they engaged in mathematical discussions in their classroom interactions. Discussion of the lack of math presented in the classroom and the discrepancy of teachers' beliefs and teaching behaviors are discussed.     

Beyond English language proficiency scores: understanding the academic performance of international undergraduate students during the first year of study

ABSTRACT

Past research into the relationship between English proficiency test (EPT) scores and score profiles, such as the IELTS and the TOEFL, has shown that there is not always a clear relationship between those scores and students’ subsequent academic achievement. Information about students’ academic self-concept (ASC) may provide additional information that helps predict future academic success. Research has consistently shown a positive relationship between students’ ASC and subsequent academic achievement and educational attainment in both school and higher education settings. The purpose of the current study was to examine the relationship between the academic performance of international students and their language proficiency and academic self-concept as well as other characteristics related to academic success. The study focused on first year international students in undergraduate business programs at an English-medium university in Canada. The following information was collected about the student participants: grades in degree program courses, annual GPA, and EPT scores (including subscores). In addition, students completed an academic self-concept scale. To obtain additional information about success in first-year business courses, instructors in two required courses were interviewed about the academic and language requirements in their courses and the profile of successful students. Correlations between the students’ course grades, GPA, EPT scores, and ASC score were calculated. The instructor interviews were analyzed using a content analysis procedure. The findings from all data sources were triangulated and show that language ability, ASC, and other factors impact academic success during the first year in a business program. The implications of these findings are discussed.     

Classification Consistency and Accuracy for Mixed-Format Tests

This study explores classification consistency and accuracy for mixed-format tests using real and simulated data. In particular, the current study compares six methods of estimating classification consistency and accuracy for seven mixed-format tests. The relative performance of the estimation methods is evaluated using simulated data. Study results from real data analysis showed that the procedures exhibited similar patterns across various exams, but some tended to produce lower estimates of classification consistency and accuracy than others. As data became more multidimensional, unidimensional and multidimensional item response theory (IRT) methods tended to produce different results, with the unidimensional approach yielding lower estimates than the multidimensional approach. Results from simulated data analysis demonstrated smaller estimation error for the multidimensional IRT methods than for the unidimensional IRT method. The unidimensional approach yielded larger error as tests became more multidimensional, whereas a reverse relationship was observed for the multidimensional IRT approach. Among the non-IRT approaches, the normal approximation and Livingston-Lewis methods performed well, whereas the compound multinomial method tended to produce relatively larger error.     

SOCIAL PERSUASIONS BY TEACHERS AS A SOURCE OF STUDENT SELF‐EFFICACY: THE MODERATING ROLE OF PERCEIVED TEACHER CREDIBILITY

The primary purpose of this study was to ascertain whether the degree to which Korean middle school students perceived their teachers to be credible made a difference in the effectiveness of teachers’ persuasion as a source of students’ academic self‐efficacy. In the contexts of both general school learning and a specific subject of Korean language and literature, social persuasions by teachers were a significant predictor of student self‐efficacy. Students’ academic self‐efficacy, in turn, was a significant predictor of students’ expected final examination scores. Although perceived teacher credibility did not predict student self‐efficacy directly, it interacted significantly with teacher persuasion in the prediction of student self‐efficacy, as determined by the latent interaction analysis. Consistent with Bandura's assertion and our hypothesis, students reported stronger academic self‐efficacy as they perceived the teachers who delivered the social persuasion to be more credible.     

What contributes to low achievement of middle school students: Evidence from multigroup structural equation modeling

The authors' purpose was to examine the degree to which low achievement is related to ontogenetic factors (i.e., personal psychological traits expressed as attention and depression) or microsystemic factors (i.e., socioeconomic status, parenting, relationship with peers and teachers), using a total of 721 middle school students in South Korea. Based on the percentile rank, low-achieving students (bottom 15%; n = 323) and high-achieving students (top 15%; n = 398) were grouped, and a multigroup structural equation modeling was employed to determine which ecological factor(s) contribute to predict low achievement of middle school students. Results from multigroup structural equation modeling showed that 3 of the 6 ecological and ontological factors had significant direct or indirect effect on low achievement: socioeconomic status (direct effect), attention (direct effect), parenting (indirect effect). The findings are discussed in terms of the intertwined influences of ecological factors on low achievement, finally leading to the discussion on the limitations and future directions for research.     

How flexible gender identities give young women advantages in China’s new economy

ABSTRACT

In this article, we examine how a cohort of urban youth born under China’s one-child policy have developed flexible gender identities through their childrearing aspirations and educational and occupational narratives, choices, and trajectories between 1999 and 2014. Drawing on surveys of 406 respondents conducted in 1999, 2012–2013, and 2013–2014, and interviews of 48 of those respondents in 2011–2014, we argue that our female research participants were more able to produce flexible gender identities than their male counterparts, and that China’s new market economy increasingly rewards youth who are flexible enough to adjust to rapidly changing circumstances, an approach more compatible with the flexible gender identities produced by young women than the more rigid gender identities produced by young men.     

Reciprocal influences between stressful life events and adolescent internalizing and externalizing problems

Investigated in this study were hypothesized reciprocal influences between stressful life events and adolescent maladjustment using data from a 6-year, prospective longitudinal study. Stressful life experiences, internalizing symptoms, and externalizing behaviors were assessed for a sample of adolescents (215 males, 236 females) living in the rural Midwest. From 7th to 12th grades, autoregressive analyses showed that stressful life events and these two forms of maladjustment were reciprocally interrelated over time. For example, stressful life events at one point significantly predicted delinquent behaviors 1 year later, which, in turn, significantly predicted stressful life events 1 year later, and vice versa. The findings provide evidence for the accumulating disadvantage for adolescents that results from the mutual reinforcement of problematic situations and adjustment problems over time.