A Gentle Introduction to Bayesian Analysis: Applications to Developmental Research

Bayesian statistical methods are becoming ever more popular in applied and fundamental research. In this study a gentle introduction to Bayesian analysis is provided. It is shown under what circumstances it is attractive to use Bayesian estimation, and how to interpret properly the results. First, the ingredients underlying Bayesian methods are introduced using a simplified example. Thereafter, the advantages and pitfalls of the specification of prior knowledge are discussed. To illustrate Bayesian methods explained in this study, in a second example a series of studies that examine the theoretical framework of dynamic interactionism are considered. In the Discussion the advantages and disadvantages of using Bayesian statistics are reviewed, and guidelines on how to report on Bayesian statistics are provided.     

Continuing education as a catalyst for inter-professional collaboration

Do nurses have access to the tools and resources they need for evidence-based practice? Are librarians prepared to work with nurses to provide access to appropriate resources and services, and teach the needed information literacy skills? The authors work with professional library and nursing organizations to present interdisciplinary continuing education to improve the information literacy of nurses and the ability of librarians to provide resources and services that meet nurses' information needs. This article reviews behavioral and practice changes reported by nurses and librarian participants in symposia on evidence-based nursing in March 2001 and May 2003.     

Using images to promote reflection: an action research study in Zambia and Tanzania

This paper focuses on the use of images to promote reflection and analysis of inclusive practices. The image-based work was set in the context of a two-year action research study, which took place in Tanzania and Zambia, 2001–2003, in collaboration with researchers from the Enabling Education Network (EENET), based at the University of Manchester's School of Education. This study, entitled, 'Understanding Community Initiatives to Improve Access to Education' involved the use of a wide range of processes to promote reflection, analysis and documentation, including a range of different types of images. We reflect here on the learning, which took place among the researchers in all three countries in using images as a basis for reflection on inclusive education.     

Stabilized generation of precise triangular waves,square waves and trapezoidal waves in three phases

A new three-dimensional compact oscillator model for generating three phases of triangular waves and square waves (and also trapezoidal waves) is developed by considering carefully a recently suggested model for the precise quadrature generation of similar waves in two phases. The properties of the solution of the new model equations are investigated and they suggest that the oscillator should possess applications for the design of relatively simple electronic three phase triangular and square wave generators. “Software” applications of the model and its employment for power systems simulations are also discussed briefly.     

Number sense growth in kindergarten: a longitudinal investigation of children at risk for mathematics difficulties

Number sense development of 411 middle- and low-income kindergartners (mean age 5.8 years) was examined over 4 time points while controlling for gender, age, and reading skill. Although low-income children performed significantly worse than middle-income children at the end of kindergarten on all tasks, both groups progressed at about the same rate. An exception was story problems, on which the low-income group achieved at a slower rate; both income groups made comparable progress when the same problems were presented nonverbally with visual referents. Holding other predictors constant, there were small but reliable gender effects favoring boys on overall number sense performance as well as on nonverbal calculation. Using growth mixture modeling, 3 classes of growth trajectories in number sense emerged.     

Children's Understanding of the Meaning and Functions of Verbal Irony

We investigated children's understanding of irony and sensitivity to irony's meanness and humor. In Study 1, 89 participants (5–6-year-olds, 8–9-year-olds, adults) heard ironic and literal criticisms, and literal compliments. Comprehension of irony emerged between 5 and 6 years of age. Ratings of humor increased with age; ratings of meanness did not (showing that all ages perceived irony as more muted than literal criticism). In Study 2, results from 135 participants (6–7-year-olds, 8–9-year-olds, and adults) replicated these findings and revealed the role of form and intonation. Thus, comprehension of irony emerges between 5 and 6 years of age, and sensitivity to the muting function develops prior to sensitivity to the humor function.