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The Effects of Attrition on Baseline Comparability in Randomized Experiments in Education: A Meta-Analysis
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Valentine, Jeffrey C.; McHugh, Cathleen M. – Psychological Methods, 2007
Using meta-analysis, randomized experiments in education that either clearly did or clearly did not experience student attrition were examined for the baseline comparability of groups. Results from 35 studies suggested that after attrition, the observed measures of baseline comparability of groups did not differ more than would be expected given…
Descriptors: Sampling, Effect Size, Student Attrition, Educational Research
The Core Analytics of Randomized Experiments for Social Research. MDRC Working Papers on Research Methodology
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Bloom, Howard S. – MDRC, 2006
This chapter examines the core analytic elements of randomized experiments for social research. Its goal is to provide a compact discussion for faculty members, graduate students, and applied researchers of the design and analysis of randomized experiments for measuring the impacts of social or educational interventions. Design issues considered…
Descriptors: Research Methodology, Research Design, Experiments, Social Science Research
Towards the Determination of the Structure of HIV-1 p24: A Possible Target for Antiviral Therapy.
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Prongay, Andrew J. – American Journal of Pharmaceutical Education, 1991
The importance of targeting certain stages in the life cycle of the virus for antiviral therapy is discussed with reference to the Human Immunodeficiency Virus type 1. Research conducted on a core antigen, p24, is described. (MSE)
Descriptors: Acquired Immune Deficiency Syndrome, Disease Control, Drug Therapy, Higher Education
Molecular Strategies for the Inhibition of Human Immunodeficiency Virus Reverse Transcriptase.
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Goldman, Mark E. – American Journal of Pharmaceutical Education, 1991
The molecular properties of Human Immunodeficiency Virus type 1 (HIV-1) reverse transcriptase are summarized and several strategies developed to inhibit its activity are described. (MSE)
Descriptors: Acquired Immune Deficiency Syndrome, Disease Control, Drug Therapy, Higher Education
Administrative Aspects of Human Experimentation.
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Irvine, George W. – SRA Journal of the Society of Research Administrators, 1992
The following administrative aspects of scientific experimentation with human subjects are discussed: the definition of human experimentation; the distinction between experimentation and treatment; investigator responsibility; documentation; the elements and principles of informed consent; and the administrator's role in establishing and…
Descriptors: Administrative Policy, Administrator Role, Ethics, Experiments
Safety in the Chemical Laboratory: Nitric Acid, Nitrates, and Nitro Compounds.
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Bretherick, Leslie – Journal of Chemical Education, 1989
Discussed are the potential hazards associated with nitric acid, inorganic and organic nitrate salts, alkyl nitrates, acyl nitrates, aliphatic nitro compounds, aromatic nitro compounds, and nitration reactions. (CW)
Descriptors: Acids, Chemical Reactions, Chemistry, College Science
Learning by Doing? Prospective Elementary Teachers' Developing Understandings of Scientific Inquiry and Science Teaching and Learning. Research Report
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Haefner, Leigh Ann; Zembal-Saul, Carla – International Journal of Science Education, 2004
This study examined prospective elementary teachers' learning about scientific inquiry in the context of an innovative life science course. Research questions included: (1) What do prospective elementary teachers learn about scientific inquiry within the context of the course? and (2) In what ways do their experiences engaging in science…
Descriptors: Comparative Analysis, Teaching Methods, Science Experiments, Science Curriculum
Focus on Experiments. Learning in Science Project. Working Paper No. 2.
Osborne, Roger; And Others – 1979
The first (exploratory) phase of the Learning in Science Project focused on science teaching/learning in the Form 1 to 4 level (ages 10 to 14) and sought to identify problems and difficulties in several areas. Provided in this paper are comments obtained during structured/unstructured interviews (from students, ex-students, teachers, headmasters,…
Descriptors: Academic Achievement, Curriculum Development, Elementary School Science, Elementary Secondary Education