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Topic: Experimental control

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	Experimental control - Wikipedia, the free encyclopedia
		These control groups are useful to derive baselines measures or observations used for evaluating the results of an experiment.
		Controls are used so that an experimenter can compare the group that has changed to the group that stayed the same.
		To have a baseline measure we set up a control group which is fed with ordinary diet and have other groups which are fed a low carb diet (the experimental group).
	en.wikipedia.org /wiki/Control_experiment (238 words)

	Approaches to Evaluating Welfare Reform: Lessons from Five State Demonstrations: Chapter 4: Implementation of ...
		Experimental cases in the sample of approved applicants were subject to control group policies for one month before the application of experimental group policies.
		Anticipating their experimental or control status, recipients may decide to leave welfare before random assignment, and potential applicants may decide either not to apply for assistance or to apply with another individual identified as the case head.
		When control group policies are changed, the resulting measures of the impacts of the welfare reform program will be biased, because the control group is subject to policies and situations qualitatively different from those that would have existed in the absence of welfare reform.
	aspe.hhs.gov /HSP/isp/waivers/chap4.htm (6924 words)

	Experimental
		Experimental control attempts to predict events that will occur in the experimental setting by neutralizing the effects of other factors.
		Control Group -The use of a matched or similar group which is not exposed to the experimental variable can help reduce the effect of History, Maturation, Instrumentation, and Interaction of Factors.
		The control group is exposed to all conditions of the experiment except the experimental variable.
	www.okstate.edu /ag/agedcm4h/academic/aged5980a/5980/newpage2.htm (1803 words)

	Evaluation of Family Preservation and Reunification Programs: The Outcomes
		More families in the experimental group experienced placement of a child than in the control group (at one year, 28% of the experimental group vs. 22% of the control group) although the differences are not significant.
		Since the control and experimental groups were randomly assigned and are expected to be statistically equivalent before services are begun, the proportion of families experiencing placement in the control group indicates the proportion of referred families that would have experienced placement in the absence of receiving family preservation services.
		The percentages were similar in the investigative group (8 percent of the experimental compared with 5 percent of the control group), and among those with recent substantiated allegations (6 percent of the experimental group compared with 3 percent of the control group).
	aspe.hhs.gov /HSP/fampres94/Chapter8.htm (6632 words)

	control group study, double-blind, random tests
		The control and experimental groups must be identical in all relevant ways except for the introduction of a suspected causal agent into the experimental group.
		The evaluator is kept blind to the controls to prevent him or her from subtly tipping off the subject, either knowingly or unknowingly.
		Many control group studies use a placebo in control groups to keep the subjects in the dark as to whether they are being given the causal agent that is being tested.
	skepdic.com /control.html (1215 words)

	Experimental control - KPIwiki (Site not responding. Last check: 2007-10-06)
		Detailed recordkeeping is essential, to aid in recording and reporting on the experimental results, and providing evidence of the effectiveness and integrity of the procedure.
		Integrity may be augmented by the introduction of a control.
		If the experimental conclusions fail to match the predictions/hypothesis, then one returns to the failed hypothesis and re-iterates the process.
	kpi.mine.nu /wiki/index.php?title=Experimental_control&printable=yes (238 words)

	Innovative Traffic Control Devices (Site not responding. Last check: 2007-10-06)
		Requests for experimentation must originate with the State/local highway agency or toll operator responsible for the operation of the road or street on which the experiment is to take place.
		An explanation of how the experimental device was developed; if it has been tested or used, in what ways it was found to be adequate or inadequate; and how this choice of device or application was derived.
		Requests for funding the experimentation should be directed to the State highway agency or local jurisdiction responsible for the roadway location where the experimental device is installed.
	www.ltapt2.org /handbook/article5.htm (3672 words)

	Basic Experimental Design (Site not responding. Last check: 2007-10-06)
		Dealing with this problem is handled by having a control group that is subject to the same conditions as the treatment groups, then administering a placebo to the control group.
		This class of information, available only when two or more experimental units or groups of subjects are used, deals with whether the subjects in the different units were about the same in relevant attributes before the treatment, and during the treatment, except for the treatment condition itself.
		If the experimental designer cannot provide information as to the comparability of groups, he/she must be prepared to admit the possibility that the groups differed in some essential aspect which produced the results observed.
	www.sytsma.com /phad530/expdesig.html (5065 words)

	CHAPTER 11 (Site not responding. Last check: 2007-10-06)
		Experimental treatments are the alternative manipulations of the independent variable being investigated.
		Internal validity refers to whether or not the experimental treatment was the sole cause of observed changes in the dependent variable.
		An experimental control is an attempt to exclude the possibility that some extraneous variable influences the relationship between the independent and dependent variable.
	cville.northatlantic.nf.ca /ptilley/MR2300/Ch11.htm (4872 words)

	AstroSignature: Alcoholism (Building a Control Group)
		The primary concern in building an astrological control group is that you control for the non-random aspects of your experimental group.
		Your experimental group should have an even distribution of birth years covering a range that is at least equal to the orbital period of the planet in your study with the longest orbit.
		We are balancing the risk of building a control group that too tightly mirrors the experimental group and masks the effect vs. finding effects that aren't really there because the control group did not mirror the experimental group closely enough (you're measuring noise).
	www.astrodatabank.com /AS/ASAlcoholism1.htm (2420 words)

	N633 Graduate Nursing Research
		However, the inability to randomize or secure a control group should not force a researcher to abandon all hopes of conducting a respectable investigation.
		However, because control is lacking in quasi-experiments, its weakness is that there may be several "rival hypotheses" competing with the experimental manipulation as explanations for observed results.
		The nine wards and not the subjects were randomly assigned to treatment groups and the control group.
	www.indstate.edu /mary/N633/1quasi.html (617 words)

	Executive Summary
		The experimental program represented an effort to enhance sport fish populations through the limited applications of the chemical lampricides TFM and niclosamide (niclosamide is the active ingredient in Bayluscide) to selected streams and deltas to target and control larval sea lamprey populations.
		Recognition of a changing environment, the changing nature of sea lamprey infestation and evolving sea lamprey control technology requires that adaptability and flexibility be built into a proposed sea lamprey control program.
		Strategies for control at each location are developed using the screening process, culminating in the development of a prioritized list of potentially employable sea lamprey control methodologies designed to achieve the greatest practical integrated sea lamprey control and mitigate adverse environmental consequences.
	www.fws.gov /r5lcfwro/lamprey/dseisexec.htm (911 words)

	Experimental Control of Unstable Patterns and Elimination of Spatio-Temporal Disorder in a Nonlinear Optical Feedback ... (Site not responding. Last check: 2007-10-06)
		One outstanding feature of such a noninvasive control method is an asymptotically vanishing control signal when the system is approaching the desired target state.
		The control was then used for stabilizing large aspect ratio optical patterns of all inherent stationary solutions (homogeneous solution, roll- square and hexagonal patterns).
		Deeper experimental inside to the fundamentals of spontaneous pattern formation is given by the tracking of unstable solutions and investigation of the spatially resolved control signals.
	www.na.infn.it /amalfi99/abstract_Benkler.htm (401 words)

	Experimental Control (Site not responding. Last check: 2007-10-06)
		A processor's digital inputs and outputs can be used for complex experimental control.
		For example, the device could be programmed to automatically generate a signal every time a particular combination of buttons on a response box were pressed.
		Many experiments rely on the use of eye-trackers to control when stimuli are presented.
	www.tdt.com /RPvds_Applications/Experimental_control.htm (193 words)

	Experimental control of free and forced structural vibration using a linear coupling strategy
		The control strategy is implemented by coupling a virtual second-order linear system (controller) to an oscillatory plant and creating an energy exchange between the two systems.
		The energy transfer phenomenon between the two oscillators is maximized by coupling the appropriate states of the plant and the controller.
		The experimental verification of this approach to vibration suppression is presented for the cases where it is undesirable to add actuators with significant mass and stiffness to the structure.
	ej.iop.org /EJ/abstract/0964-1726/6/5/005 (436 words)

	EXPERIMENTAL SCIENCE PROJECTS: An Intermediate Level Guide
		The physical sciences, like physics and chemistry, use experimental forms of the "scientific method." The physical sciences do experiments to gather numerical data from which relationships are derived, and conclusions are made.
		Experimental science is actually the search for cause and effect relationships in nature.
		A control is a neutral "reference point" for comparison that allows you to see what changing a variable does by comparing it to not changing anything.
	www.isd77.k12.mn.us /resources/cf/SciProjInter.html (2350 words)

	Experimental Control (Site not responding. Last check: 2007-10-06)
		He made 8 types of homemade fire starters and then tested 3 of each for fire starting time, flame height, length of burn, and temperature.
		They also criticized his use of paraffin wax (a fuel) as a component of the fire starters even though all of their "recipes" called for it.
		Could you please explain what control he should have used?
	www.newton.dep.anl.gov /askasci/gen01/gen01224.htm (149 words)

	Experimental Platform for Real-Time Control - Morris, van Nieuwstadt (ResearchIndex) (Site not responding. Last check: 2007-10-06)
		Introduction The importance of research on experimental systems and the interaction of theory with application is often neglected in the academic control...
		Identification Experiments The objective of the identification experiments is to estimate an LTI model of the helicopter operating at...
		Identification and Control of a Model Helicopter in Hover - Morris, van Nieuwstadt, al.
	citeseer.ist.psu.edu /263195.html (414 words)

	Mind Control Forum Home Page
		For the people that have endured mind control mixed with ritual abuse it is the same thing.
		One common ground that many Victims of Mind Control have, whether it is by some kind of electronic means or psychological, is that we need to come together and let others know that they are not alone.
		Mind control victims and supporters, and other interested parties to have your accounts or announcements published here you may use the submit page, for any website, email updates you can use update form on the email contact page.
	www.mindcontrolforums.com (3378 words)

	Experimental AIDS Vaccine Keeps Virus Under Control in Monkeys
		Experimental AIDS Vaccine Keeps Virus Under Control in Monkeys
		March 8, 2001 -- An experimental vaccine appears to keep immunized monkeys from developing AIDS even after they have become infected with a particularly aggressive strain of the virus that causes the disease.
		The discovery, reported in the March 8 issue of the journal Science, holds promise for a human version of the vaccine that is currently in development.
	my.webmd.com /content/article/31/1728_74236 (652 words)

	USATODAY.com - How to reach space on a pair of junkyard shocks (Site not responding. Last check: 2007-10-06)
		The desert tests are especially important now that NASA has a cadre of mission controllers who never have experienced an Apollo-era lunar exploration.
		With that in mind, the Desert Rats are linked via satellite to an experimental mission-control center in Houston to begin rebuilding that expertise.
		An astronaut could steer the tractor while walking beside it or mount the controller on the chariot itself and ride along, while steering it.
	www.usatoday.com /tech/science/space/2004-09-30-reachspace_x.htm (1204 words)

	Experimental Control
		Control over the levels or values of the independent variable
		Definition: A means to systematically vary important control variables so that their influences are equally distributed across conditions.
		Definition: A means of controlling a variable by attempting to equate it across conditions.
	www.mtsu.edu /~sschmidt/methods/control.html (492 words)

	Ashton Graybiel Spatial Orientation Laboratory
		The role of haptic cues from rough and slippery surfaces on human postural control.
		Haptic cues for orientation and postural control in sighted and blind individuals.
		Lackner, J.R. and DiZio, P. Altered sensory-motor control of the head as an etiological factor in space motion sickness.
	www.graybiel.brandeis.edu /publications/publications.html (3705 words)

	Experimental Control Software (Site not responding. Last check: 2007-10-06)
		RSVP (which stands for "rapid serial visual presentation") is an experimental control package for Macintosh and Mac-compatible computers.
		It is considerably more flexible than most experiment packages, but this flexibility comes at a price: Users may have to spend more time learning how the system works.
		Instead of setting up experiments with a series of dialog boxes, as is the case with most other packages, RSVP experiments are controlled by a series of scripts, most of which must be written by the user.
	www.cog.brown.edu /~tarr/RSVP/faq.htm (770 words)

	Experimental Control (Site not responding. Last check: 2007-10-06)
		The experimental control options control how PsychRP controls advancing between trials (i.e.
		This might be useful if the experimenter wishes to ascertain that the subject is ready to begin before advancing to the next trial.
		When this pattern is displayed, the subject must initiate the start of the next trial by simultaneously depressing the response box buttons #1 and #4.
	www.tdt.com /T2Support/PyschRPhelp/Menus/Experimental_Control.htm (135 words)

	chaos-control
		Control of chaotic maps by optimized periodic inputs.
		Control of the chaotic Duffing equation with uncertainty in all
		Control of the chaotic regimes of nonlinear drift-waves in a
	www.rusycon.ru /chaos-control.html (10679 words)

	Role Of Science In Knowledge Creation: A Philosophy Of Science Perspective
		Quasi-experiments (Campbell and Stanley, 1963) constitute a class of empirical studies that lack two of the usual features of experimentation -- the lack of full control and absence of randomization.
		They may be defined as "experiments that have treatments, outcome measures, and experimental units, but do not use random assignment to create the comparisons from which treatment-caused change is inferred" (Cook and Campbell, 1979: p.
		Their function is to probe causal relations between manipulated independent variables (treatments) and measured outcomes (effects), and their structure involves one or more treatments, measures taken after a treatment, and -- usually -- more than one unit receiving each treatment (Cook, 1983).
	www.kmbook.com /science.htm (5076 words)

	Bibliography of Fitts’ Law Research
		Fitts' law with an isometric controller: Effects of order of control and control-display gain.
		A generalized model of temporal motor control subject to movement constraints.
		Sheridan, M. Studies on the control of voluntary movement : Unpublished Ph.D. thesis, University of Hull.
	www.yorku.ca /mack/RN-Fitts_bib.htm (5046 words)

	Counting House - Experimental Hall Control Room
		Scientists can operate their experiment from this control room.
		They monitor over 30,000 channels of information to make certain that their experiments are running correctly.
		Each experimental hall has its own control room, each running independently from the others.
	education.jlab.org /sitetour/countin.html (56 words)

	Noninvasive control of beam profiles
		A self-regulating method for the control of spontaneous instabilities of the transversal beam profile in nonlinear optical systems is experimentally realized.
		The control method is the high-dimensional analogue of classical negative feedback regulators.
		An all-optical implementation with its capabilities of parallel processing is essential for the experimental feasibility.
	stacks.iop.org /1464-4258/2/303 (268 words)

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