Search results with tag "Periment"
EXPERIMENTAL AND QUASI-EXPERIMENTAL DESIGNS FOR ...
cas.cgiar.orgcausal connections from individual experiments, and (4) briefly situating the ex-periment within a larger literature on the nature of science. EXPERIMENTS AN D CAUSATION. A sensible discussion of experiments requires both a vocabulary for talking about causation and an understanding of key concepts that underlie that vocabulary.
The Scientific Method - Riverside Local Schools
www.riversidelocalschools.comcompares two or more things but changes only one variable—factors that change in an ex-periment. This type of experiment is called a controlled experiment. For example, when test-ing the affects of fertilizer on plants, you would test an experimental group (with fertilizer) and a control group (without fertilizer).
The Franck-Hertz Experiment - University of Michigan
instructor.physics.lsa.umich.eduJan 30, 2006 · The Franck-Hertz Experiment The Franck-Hertz experiment, first undertaken shortly after Bohr’s theory of the atom was pre-sented, provided one of the early indications that atoms had discrete energy levels. In this ex-periment, electrons are accelerated and pass through mercury vapor, where they lose energy by
Types of Epidemiologic Studies - McGill University
www.med.mcgill.catreatments for patients who already have some disease (trial is used as a synonym for ex- periment). Epidemiologic experiments that aim to evaluate primary preventives (agents intended to prevent disease onset in the first place) are less common than clinical trials; these studies are usuallyfield trials or community intervention trials.
Correlation in Random Variables - College of Science | RIT
www.cis.rit.edu• A random variable is a function X(e) that maps the set of ex-periment outcomes to the set of numbers. • A random process is a rule that maps every outcome e of an experiment to a function X(t,e). • A random process is usually conceived of as a function of time, but there is no reason to not consider random processes that are
The Methodology of Organizational Diagnosis
leeds-faculty.colorado.eduEntry is like a natural ex-periment, providing consultants with an opportunity to observe how the system re-sponds when its boundaries become more permeable. As human beings themselves, consultants also experience the period of entry as a time of anxiety. In part this arises because the consultants are dealing with their
A logical calculus of the ideas immanent in nervous activity
home.csulb.eduAs yet ex- periment has not shown whether the refractoriness is relative or ab- solute. We will assume the latter and demonstrate that the difference is immaterial to our argument. Either variety of refractoriness can be accounted for in either of two ways. The "inhibitory synapse" may be of such a kind as to produce a substance which raSses ...