Disrupting a gene to determine its effect on an organism's phenotype is an indispensable tool in molecular biology. Such techniques are critical for understanding how a gene product contributes to the development and cellular identity of organisms. The explosion of genomic sequencing technologies combined with recent advances in genome-editing…

Difficulties encountered by teachers in giving a definition of the term "energy", and by students in grasping its actual meaning, reflect the lengthy process through which the concept eventually came to maturity around 1850. Tracing the history of this process illuminates the different aspects covered by the term and shows the important…

In an age of unprecedented scientific achievement, I argue that the neurosciences are poised to transform our perceptions about life on earth, and that collaboration is needed to exploit a vast body of knowledge for humanity's benefit. The scientific method distinguishes science from the humanities and religion. It has evolved into a professional,…

In a recent study of conceptual combination, Estes (2003) presented evidence for the priming of relational information in the absence of shared constituents between the prime and target (e.g., "pancake spatula" was interpreted more quickly following "bacon tongs" than following "city riots"). He argued that these data support the view that…

The purpose of this paper is to engender a healthy respect for Gestalt theory and techniques and the use of the techniques in the client's best interest and in the interest of positive professional and self-development in the practitioner. An overview of Gestalt techniques is provided, concentrating on the two category divisions of experiments and…

An oil spill occurs somewhere in the world almost every day of the year, and the consequences can be devastating. In this month's column, students explore the effects of oil spills on plants, animals, and the environment and investigate oil spill clean-up methods through a simulated oil spill. The activities described in this article give students…

Discusses experimental work with computer-simulated microworlds as a means for overcoming the tension between laboratory research and field research in psychology. Topics addressed include characteristics of microworlds; examples of microworlds; and three approaches to research with microworlds, including the individual differences approach, case…

This paper describes systems dynamics, reviews the literature of uses of systems concepts in distance education (DE), presents a preliminary model, and ends in a call to researchers to contribute to the building of a standard model of DE. (Contains 4 figures.)

Describes the implementation of problem-based learning (PBL) pedagogy in an undergraduate classroom. Briefly describes PBL philosophy and protocols, and gives guidance in choosing and integrating a PBL problem into the curriculum. Contains 13 references. (WRM)

The first in a series of studies of lifelong learning, this paper discusses educational activities undertaken in Portugal after the fall of the dictatorship in 1974 and through 1976. Intended for educational planners and for those working in popular education, the study emphasizes original strategies and experiments, particulary those encouraging…

One in a series of studies of lifelong learning, this paper discusses the cultural and educational needs of selected urban and rural communities in Senegal and Ghana, emphasizing grassroots initiative and the community's analysis of its own needs. Information is drawn in part from surveys, public meetings, and interviews in three communities:…