The Development of Preschoolers’ Living Kinds Concept: A Longitudinal Study

Given limitations in the integrative scope of past research, basic questions about the organization and development of preschoolers’ living kinds concept remain open to debate. This study was designed to address past limitations through use of a longitudinal design, extensive stimulus set, and alternate indices of understanding. Thirty‐five English‐speaking 3‐year‐olds from middle‐class families in Albuquerque, NM participated in four testing sessions over 1 year. Indices of understanding included statements that preschoolers generated about various living and nonliving objects, biological properties they attributed to the objects, and their characterization of objects as “alive” or not. Results reveal a multifaceted picture of developmental change in preschoolers’ living kinds concept involving both the construction and elaboration of a core biological understanding.     

Preschoolers' Emotional Control in the Disappointment Paradigm and Its Relation to Temperament, Emotional Knowledge, and Family Expressiveness

The present research evaluated a conceptual model that links temperament, emotional knowledge, and family expressiveness to preschoolers' emotion regulation ability. The emotional understanding of 82 preschoolers was assessed with 2 separate tasks. After the second emotional knowledge task, the children were presented a "disappointing" prize, and their facial displays of positive and negative affect were recorded. The children and their mothers also participated in a game designed to elicit maternal expressive behavior. Mothers provided information about the preschoolers' temperament and about the frequency of positive and negative affect expressed within their families Results indicated that children's positive displays when presented the "disappointing" prize were inversely related to the temperamental dimension of emotional intensity and positively associated with children's understanding of emotion. Maternal reports of sadness within the family were inversely related to children's positive affective displays. Children's negative emotional displays in the disappointment situation were inversely related to observed maternal positive emotion. The findings from this study give greater specification to the unique and joint contributions of temperament, emotional knowledge, and family expressiveness in predicting preschoolers' expressive control of emotion.     

Preschoolers' Reasoning about Density: Will It Float?

Density is a complex concept found to appear late in development. However, density has a readily apparent empirical consequence—buoyancy. Early scientific understanding of density arose through Archimedes' discovery of water displacement as a function of density, and young children have experience playing with objects in water. Therefore, a buoyancy prediction task was developed in order to access preschoolers' early understanding of density. 3–5-yearold children from 2 preschool classes, as well as adults, made buoyancy predictions for a set of objects that varied systematically in density, weight, and volume. 4–5-year-olds (from the older class) and adults were shown to demonstrate similar patterns in their judgments. Objects much more or much less dense than water were more accurately judged than objects with densities closer to the density of water. Weight and volume were found to "interfere" in these judgments in systematic ways for the older class of children and the adults. Children in the younger class (3-year-olds) showed a mean proportion correct performance of .53; they all passed a pretest, however, and no child refused to make judgments.     

母亲教养方式与幼儿焦虑的关系

本研究采用父母教养方式问卷和学前儿童焦虑量表对556名幼儿的母亲进行问卷调查。结果发现：1．母亲的教养方式不因幼儿的年龄和性别而不同。2．母亲的教养方式不存在显著的年龄差异，但却存在显著的受教育水平差异。受教育水平较高的母亲对幼儿的权威行为显著高于受教育水平较低的母亲。3．母亲的权威行为显著高于其专制行为。4．幼儿的焦虑情绪随年龄增长呈逐渐下降趋势。5．母亲的权威行为与幼儿焦虑之间呈显著负相关，专制行为与幼儿焦虑之间呈显著正相关。     

Students' Reports of Their Cognitive Processes and Level of Understanding During Regular Classroom Instruction

The study was designed in an attempt to gain greater understanding of the kinds of learning processes engaged in by students during regular classroom instruction, and at investigating the students' level of understanding and problems in understanding parts or all of the lessons. Six school levels of male and female students from 44 secondary and pre-university classes (N=2719) were the subjects of this study. During the lessons, students and teachers were observed and video-taped. Following the lessons, students' reports of their learning processes were obtained using a questionnaire. The questionnaire also served as the basis for a follow-up interview of four randomly selected students from each of the sampled classes. The whole procedure was repeated for each class within a one-month period and for a different curricular area.

Analyses of student responses showed that more of the average ability students as compared to the high or low ability students reported understanding all of the lessons. However, the higher ability students were more likely to report using specific cognitive strategies to monitor their understanding of the lessons and in processing intellectual tasks and lesson content. They were able to provide more elaborate and more specific reasons for not understanding parts of the lessons. The results were interpreted in terms of physical and organizational characteristics of educational classrooms in Singapore. Instructional implications are discussed in relationship to both the findings and previous literature.     

Preschoolers' Understanding of the Link between Thinking and Feeling: Congnitive Cuing and Emotional Change

In 3 studies we investigated 3- through 6-year-olds' knowledge of thinking and feeling by examining their understanding of how emotions can change when memories of past sad events are cued by objects in the current environment. In Study 1, 48 4-, 5-, and 6-year-olds were presented with 4 illustrated stories in which tocal characters experience minor sad events. Later, each story character encounters a visual cue that is related to one of his or her previous sad experiences. Children were told that the character felt sad and they were asked ot explain why. Study 1 suggested considerable competence as well as substantial development in the years between 4 and 6 in the understandings of the influence of mental activity on emotions. Studies 2 and 3 more systematically explored preschoolers' understanding of cognitive cuing and emotional change with difterent types of situations and cues. Across these 2 studies, 108 3-, 4-, and 5-year-olds listened to illustrated stories that featured story characters who each experienced a sad event and swho were later exposed to a related cue. Children were not only asked to explain why the characters suddenly felt sad, but in some stories, they were also asked to predict and explain how another character, who was never at the past sad event, would feel. Results of studies 2 and 3 showed an initial understanding of cognitive cuing and emotion in some children as young as 3, replicated and extended the evidence for significant developmental changes in that understanding during the preschool years, and revealed that the strenght and consistency of preschoolers' knowledge of cognitive cuing and emotion was affected by whether cues were the sme, or only similar to, parts of the earlier events.     

Children's Understanding of the Stream of Consciousness

Children and adults were tested for their understanding that there is a virtually continuous flow of mental content in a waking person, a "stream of consciousness" that continues to run even when the person is not examining stimuli perceptually or trying to solve a problem. There was a marked increase with age from preschool to adulthood in subjects' tendency to say that a person who was just waiting quietly was having "some thoughts and ideas" rather than "a mind empty of thoughts and ideas." 4-year-olds also tended to say that the mind of a waiting person was "not doing anything," whether that person was another individual or themselves, and that a person who wanted to could keep his or her "mind completely empty of all thoughts and ideas" for 3 min. These results suggest that preschoolers' conceptions of people's mental lives may be quite different from those of older children and adults.     

Patterns of Solution Behavior across Items in Low-Stakes Assessments

The trustworthiness of low-stakes assessment results largely depends on examinee effort, which can be measured by the amount of time examinees devote to items using solution behavior (SB) indices. Because SB indices are calculated for each item, they can be used to understand how examinee motivation changes across items within a test. Latent class analysis (LCA) was used with the SB indices from three low-stakes assessments to explore patterns of solution behavior across items. Across tests, the favored models consisted of two classes, with Class 1 characterized by high and consistent solution behavior (>90% of examinees) and Class 2 by lower and less consistent solution behavior (<10% of examinees). Additional analyses provided supportive validity evidence for the two-class solution with notable differences between classes in self-reported effort, test scores, gender composition, and testing context. Although results were generally similar across the three assessments, striking differences were found in the nature of the solution behavior pattern for Class 2 and the ability of item characteristics to explain the pattern. The variability in the results suggests motivational changes across items may be unique to aspects of the testing situation (e.g., content of the assessment) for less motivated examinees.     

Determining the Number of Latent Classes in Single- and Multiphase Growth Mixture Models

Stage-sequential (or multiphase) growth mixture models are useful for delineating potentially different growth processes across multiple phases over time and for determining whether latent subgroups exist within a population. These models are increasingly important as social behavioral scientists are interested in better understanding change processes across distinctively different phases, such as before and after an intervention. One of the less understood issues related to the use of growth mixture models is how to decide on the optimal number of latent classes. The performance of several traditionally used information criteria for determining the number of classes is examined through a Monte Carlo simulation study in single- and multiphase growth mixture models. For thorough examination, the simulation was carried out in 2 perspectives: the models and the factors. The simulation in terms of the models was carried out to see the overall performance of the information criteria within and across the models, whereas the simulation in terms of the factors was carried out to see the effect of each simulation factor on the performance of the information criteria holding the other factors constant. The findings not only support that sample size adjusted Bayesian Information Criterion would be a good choice under more realistic conditions, such as low class separation, smaller sample size, or missing data, but also increase understanding of the performance of information criteria in single- and multiphase growth mixture models.     

The Virtual Solar System Project: Developing Conceptual Understanding of Astronomical Concepts Through Building Three-Dimensional Computational Models

The Virtual Solar System (VSS) course described in this paper is one of the first attempts to integrate three-dimensional (3D) computer modeling as a central component of an introductory undergraduate astronomy course. Specifically, this study assessed the changes in undergraduate university students' understanding of astronomy concepts as a result of participating in an experimental introductory astronomy course in which the students constructed 3D models of different astronomical phenomena. In this study, we examined students' conceptual understanding concerning three foundational astronomical phenomena: the causes of lunar and solar eclipses, the causes of the Moon's phases, and the reasons for the Earth's seasons. Student interviews conducted prior to the course identified a range of student alternative conceptions previously identified in the literature regarding the dynamics and mechanics of the Solar System. A previously undocumented alternative conception to explain lunar eclipses is identified in this paper. The interviews were repeated at the end of the course in order to quantitatively and qualitatively assess any changes in student conceptual understanding. Generally, the results of this study revealed that 3D computer modeling can be a powerful tool in supporting student conceptualization of abstract scientific phenomena. Specifically, 3D computer modeling afforded students the ability to visualize abstract 3D concepts such as the line of nodes and transform them into conceptual tools, which in turn, supported the development of scientifically sophisticated conceptual understandings of many basic astronomical topics. However, there were instances where students' conceptual understanding was incomplete and frequently hybridized with their existing conceptions. These findings have significant bearing on when and in what domains 3D computer modeling can be used to support student conceptual understanding of astronomy concepts.     

A study of changes in middle school teachers' understanding of selected ideas in science as a function of an in-service program focusing on student preconceptions

This article examines the impact of a specially designed in-service model on teacher understanding of selected science concepts. The underlying idea of the model is to get teachers to restructure their own understanding of a selected science topic by having them study the structure and evolution of their students' ideas on the same topic. Concepts on topics from the life, earth, and physical sciences served as the content focus and middle school Grades 4–9 served as the context for this study. The in-service experience constituting the main treatment in the study occurred in three distinct phases. In the initial phase, participating teachers interviewed several of their own students to find out what kinds of preconceptions students had about a particular topic. The teachers used concept mapping strategies learned in the in-service to facilitate the interviews. Next the teachers teamed with other teachers with similar topic interests and a science expert to evaluate and explore the scientific merit of the student conceptual frameworks and to develop instructional units, including a summative assessment during a summer workshop. Finally, the student ideas were further evaluated and explored as the teachers taught the topics in their classrooms during the fall term. Concept maps were used to study changes in teacher understanding across the phases of the in-service in a repeated-measures design. Analysis of the maps showed significant growth in the number of valid propositions expressed by teachers between the initial and final mappings in all topic groups. But in half of the groups, this long-term growth was interrupted by a noticeable decline in the number of valid propositions expressed. In addition, analysis of individual teacher maps showed distinctive patterns of initial invalid conceptions being replaced by new invalid conceptions in later mappings. The combination of net growth of valid propositions and the patterns of evolving invalid conceptions is discussed in constructivist terms.     

Towards a theory of mathematics homework as a social practice

This article presents a theoretical conceptualization of mathematics homework as a social practice. Rather than considering homework as a task or an artifact, this approach frames homework in terms of the social contexts in which students participate and how students participate in those contexts. This perspective has long been suggested by homework researchers but has not been developed as a framework for understanding homework. Drawing from Wenger’s (1998) social theory of learning and research grounded in sociocultural theory, this conceptualization makes central meaning making and identity development, and puts forth meaning and identity as lenses for understanding students’ participation in the practice of mathematics homework. To further develop this conceptualization of homework, I draw on data from an ethnographic study of the role and meaning of mathematics homework in the lives of middle school students. Case studies of two students are presented to demonstrate the relationships among the meaning of homework, students’ identities, and their participation in the practice of homework. One student’s experiences support him in identifying as a capable mathematics student who is bound for continued academic success through high school to college. Thus, he comes to take on mathematics homework as a means to learn and succeed. The other student’s experiences support him in building an identity that leads him to reject homework. This conceptualization of homework and the case study data have implications for the practice of homework and for theories of students’ motivational dispositions in the context of mathematics homework and learning in general.     

Lessons from television: children's word learning when viewing

The study investigated if preschoolers can learn novel words when viewing television and if the learning is influenced by age or type of word. 61 preschoolers, ages 3 and 5, were assigned to either an experimental or control group. They viewed a 15-min television program, featuring 20 different novel words, 5 each in the 4 categories of object, action, attribute, and affective-state words. Comprehension was tested before and after viewing. The experimental group performed better than the controls for object, action, and attribute words. 5-year-olds were more accurate than 3-year-olds and gained relatively more from the experimental condition. The easiest words to learn were object and attribute words. The results are relevant for studies of media effects and accounts of preschoolers' "fast mapping" of new words.     

Young Children''s Disambiguation of Object Name Reference

Children show a disambiguation effect--a tendency to select unfamiliar rather than familiar things as the referents of new names. In previous studies, this effect has been reversed in young 2-year-olds, but not older children, by preexposing the unfamiliar objects, suggesting that attraction to novelty controls 2-years-olds' choices of referents for new names, but a mutual exclusivity and/or lexical gap-filling principle determines preschoolers' selections. Both the disambiguation effect and its reversal by preexposure were replicated in the present study; however, 24-month-olds' rate of selecting unfamiliar over familiar kinds was less when they were simply asked to choose between the items than when they were asked to identify the referents of unfamiliar names. Thus, some young children may have both an attraction to novel tokens and a tendency to honor an abstract lexical principle. Referent selections were also affected by object typicality and word similarity. Correlations between the tendency to acknowledge a new name's unfamiliarity and to treat it like a similar-sounding familiar name suggested that youngsters' phonological matching skills affect their interpretation of new names. Also, 4-year-olds who most often mapped distinctive-sounding new names to unfamiliar kinds tended to admit their unfamiliarity with these names most frequently, suggesting that children's increasing awareness of their own knowledge begins to affect their lexical processing during the preschool years.     

Young Children's Understanding of Thought Bubbles and of Thoughts

In a series of 4 studies, we explored preschoolers' understanding of thought bubbles. Very few 3-year-olds or 4-year-olds we tested knew what a thought-bubble depiction was without instruction. But, if simply told that the thought bubble "shows what someone is thinking," the vast majority of 3-year-olds and 4-year-olds easily understood the devices as depicting thoughts generally and individual thought contents specifically. In total, these children used thought-bubble depictions to ascertain the contents of characters' thoughts in a variety of situations; appropriately distinguished such depictions from mere associated actions or objects; described thought bubbles in the language of mental states; judged that persons' thoughts in these depictions were subjective in the sense of person-specific (and hence 2 people can have different thoughts about the same state of affairs); and judged that thought-bubble thoughts ( a ) were representational in the sense of depicting or showing some other state of affairs, ( b ) were mental and thus showed intangible, private, internal thoughts unlike real pictures or photographs, and ( c ) can be false, that is, can depict a person's misrepresentation of some state of affairs. We discuss the implications of these findings for young children's understanding of thoughts and thought bubbles, for their learning and comprehension of pictorial conventions, and for the use of thought bubbles to assess children's early understanding of mind.     

I'm Happy with My Mommy: Low-Income Preschoolers' Causal Attributions for Emotions

This study examined low-income African American and European American preschoolers' socioemotional causal attributions. Forty-seven Young (M = 48 months) and Old (M = 62 months) preschoolers were asked to justify a puppet's current emotion and to talk about their past emotional experiences. Responses were coded for Causal Theme and Clarity. Old preschoolers were twice as likely to attribute interpersonal themes, and Young preschoolers were 4 times more likely to generate causal themes that were uncodeable. In terms of clarity, children provided clearer responses for anger and fear than they did for happiness. Old preschoolers' explanations for emotions were clearer than young preschoolers' and young African Americans', who had the most difficulty explaining emotions. Results indicate that younger preschoolers, particularly young African Americans, may need help articulating emotions. Suggestions for how adults can scaffold preschoolers' emotional reasoning are discussed.     

Executive functioning and preschoolers' understanding of false beliefs, false photographs, and false signs

Two studies were conducted to investigate the specificity of the relationship between preschoolers' emerging executive functioning skills and false belief understanding. Study 1 ( N =44) showed that 3- to 5-year-olds' performance on an executive functioning task that required selective suppression of actions predicted performance on false belief tasks, but not on false photograph tasks. Study 2 ( N =54) replicated the finding from Study 1 and showed that performance on the executive functioning task also predicted 3- to 5-year-olds' performance on false sign tasks. These findings show that executive functioning is required to reason only about representations that are intended to reflect a true state of affairs. Results are discussed with respect to theories of preschoolers' theory-of-mind development.     

Parents and Children Learning Together A Study of the Effectiveness of Parental Involvement on Children's Problem Solving Skills

This study developed from the findings of a previous set of studies into parental involvement in pre-school education. Amongst some interesting results, significant were parents concerns, and uncertainties about their roles in facilitating the learning experiences of their children in the home environment.

Additionally, the findings revealed that when parents do spend time with their children, reading stories and playing board games were popular past-times. Research elsewhere reveals that the kinds of pre-school activities most effective in the development of thinking skills, involve construction, drawing and board games. Thus, an aim of this study, is to investigate the extent to which parents' understanding of the competencies involved in these activities, affects their involvement in them at home and the progress of their children in school.

This paper presents the findings of a pilot study of the role of the tutor in problem solving. It is an attempt to identify the kinds of knowledge and information about children that tutors, and subsequently parents, would need to have to be effective, and the kinds of activities which elicit developmentally appropriate strategies in children when presented with problem solving tasks. The results show that if parents are to be effective as collaborators in their children's learning, an understanding of qualitative differences in children, the kinds of activities and experiences provided, and methods of presentation, are vital factors for success.