Class size in the first years at school: a New Zealand perspective on the international literature

During the 1980s, topics evident in the class size research included class size and children’s achievement, children’s behavior and affect, outcomes for different groups of children, teacher satisfaction and stress, the organization of instruction, and cost effectiveness. A New Zealand review tracing through the approaches to class size research indicated that the research methods used to investigate class size had become increasingly complex. In the 1990s, these topics continue to be addressed, with an increasing emphasis on the features and impact over time of smaller classes, and on the economics of schooling. In New Zealand in the late 1980s, a 1 : 20 teacher to pupil ratio policy was introduced for junior classes. The current staffing ratio in junior classes is 1 : 23. This summary review of the literature on class size highlights some issues and complexities arising from the international research and research within the New Zealand context.     

Learning by exploration: Thinking aloud while exploring an information system

The aim of the current research is to examine the ability of people to learn a computer system by exploration and to asses the efficacy of a user interface with properties that are supposed to support exploration. The study described in this paper used the think-aloud method to obtain detailed information about the goals of the user and their realization during the initial learning phase. The focus here will be on discussing the role of thinking aloud and reflection during performing complex cognitive activities. In one condition of the experiment described here an interface was used with exploration-supportive properties. In the other condition these properties were removed from the interface. Subjects (university students) solved a number of (e-mail) tasks with these interfaces, without training, and had to think aloud during the first half. After solving the tasks a knowledge test about the interface was presented. The results on the three kinds of measures (think aloud measures, task performance and performance on the knowledge test) broadly were in favor of exploration-supportive interface. In the discussion attention is paid to the positive influence of thinking aloud, probably occurring because subjects were encouraged to use the available information on screen in the exploration-supportive condition. The consequences and potential disadvantages of display-based, exploratory learning in relation to planning are also discussed.     

Reading achievement, metacognition, reading self-concept and interest: A study of German students in grades 3 and 4

This study examined the reading achievement, metacognitive knowledge related to reading and memory, reading self-concept, and interest in reading of 140 German school students in Grades 3 and 4. The results indicated significant correlations between the metacognitive variables, motivational variables, and amongst metacognitive and motivational variables, as well as with reading achievement variables. The examination of good and poor readers showed significant differences in metacognitive knowledge of reading and memory, reading self-concept, interest in reading, and in teacher judgements of reading achievement between the groups. Differences between Grade 3 and 4 students were found in their word decoding skills, metacognitive knowledge about reading and memory, and teacher judgements of reading achievement. Results of the regression analysis indicated that reading achievement was predicted by grade level, word decoding, and teacher evaluations of reading achievement. The causal modelling indicated that motivation and metacognition affect reading comprehension in different ways. The findings are discussed in terms of future research and their educational implications.     

The Validity of Comparative Educational Studies

What are the conditions that will allow for appropriate comparisons among groups" Should the concept of comparative validity be added to the lexicon of the psychometrician"     

Coordination chemistry of life processes: Bioinorganic chemistry

Many enzymes and proteins have metal ions at their active sites that play key roles in catalysis. An important goal of an interdisciplinary field like bioinorganic chemistry is the development of small inorganic coordination complexes that not only reproduce structural and spectroscopic features, but also function in a manner similar to their natural counterparts. To highlight this burgeoning field, some selected results on synthetic modelling of (i) the electronic structure of manganese cluster of photosystem II and (ii) functional modelling of the dinuclear copper enzyme tyrosinase are described in this article.     

Value Profiles During Middle Childhood: Developmental Processes and Social Behavior

Little is known about how children's value priorities develop over time. This study identifies children's value priority profiles and follows their development during middle childhood. Australian children (N = 609; ages 5–12 at Time 1) reported their values over 2 years. Latent Transition Analysis indicated four profiles: Social-Focus, Self-Focus, Growth-Focus and Undifferentiated. Within person development was characterized by profile stability or transfer to the Social-Focus profile. Younger children were more likely to have an Undifferentiated profile (or Self-Focus among boys) than older ones. Girls were more likely to have a Social-Focus profile or transfer to it, and less likely to have a Self- or Growth-Focus profile than boys. Social-Focus profile membership over time predicted more prosocial and less aggressive behavior.     

Child Effects on Parental Negativity: The Role of Heritable and Prenatal Factors

This study examined two possible mechanisms, evocative gene–environment correlation and prenatal factors, in accounting for child effects on parental negativity. Participants included 561 children adopted at birth, and their adoptive parents and birth parents within a prospective longitudinal adoption study. Findings indicated child effects on parental negativity, such that toddlers’ negative reactivity at 18 months was positively associated with adoptive parents’ over-reactive and hostile parenting at 27 months. Furthermore, we found that child effects on parental negativity were partially due to heritable (e.g., birth mother [BM] internalizing problems and substance use) and prenatal factors (e.g., BM illicit drug use during pregnancy) that influence children’s negative reactivity at 18 months. This study provides critical evidence for “child on parent” effects.     

Time Spent Gaming and Social Competence in Children: Reciprocal Effects Across Childhood

Electronic games are popular and many children spend much time on this activity. Here we investigate whether the quantity of time children spend on gaming is related to their social development, making this the first study to examine this relationship in children. We examine prospective relations between time spent gaming and social competence in a community sample of Norwegian 6 year olds (n = 873) followed up at ages 8, 10, and 12, controlling for socioeconomic status, body mass index, and time spent gaming together with friends. Results revealed that greater social competence at both 8 and 10 years predicted less gaming 2 years later and that more age-10 gaming predicted less social competence at age 12 but only among girls.     

Adolescent academic achievement: A model of social support and grit

Grit has been defined as passionate perseverance toward long-term challenging goals and it is associated with various positive outcomes for youth, including academic achievement. However, less is known about these associations for the two facets of grit (i.e., perseverance of effort, consistency of interest) and few studies have examined the link between grit and perceived social support. The present study examined the group-level demographic differences (i.e., gender, grade, socioeconomic status, and special education status) of grit in a high school sample (N = 1,077). In addition, direct associations between grit and perceived social support from multiple sources (i.e., teacher, classmate, parent) were examined, as well as a potential enhancing effect of social support as a moderator of the relation between grit and academic achievement. Results indicated positive associations among grit and its facets with social support from parents and classmates. Furthermore, the positive relation between grit and achievement was stronger for students reporting high social support from teachers, but not other sources (i.e., classmates, parents). Practical and theoretical implications for promoting student success are discussed.     

Childhood homelessness,resilience, and adolescent mental health: A prospective,person-centered approach

School districts and other service providers are increasingly aware of the substantial mental health needs of students experiencing family homelessness. Past findings are mixed regarding whether homelessness conveys unique risk beyond the risks associated with extreme poverty. With prospective longitudinal data on homelessness experiences across childhood, we utilized latent profile analysis as a person-centered approach to conceptualizing mental health outcomes in adolescence for 3,778 youth. We considered literal family homelessness as well as families living doubled-up, and we employed propensity score matching to identify a comparison group of nonhomeless students balanced across a range of covariates to address systematic bias. Results indicated that students who experienced literal homelessness during childhood were significantly less likely to demonstrate profiles of resilience in mental health functioning. We considered our approach and findings in light of challenges and opportunities particularly relevant to the school context.