EMMAWiki/TermsAndConcepts/ForUsers/Experimental Factors - Revision history

Alu: /* Terms and Concepts: Experimental Factors and Values */

2011-10-26T12:14:36Z

Terms and Concepts: Experimental Factors and Values

← Older revision		Revision as of 14:14, 26 October 2011
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	The following examples illustrate some possible experimental designs:		The following examples illustrate some possible experimental designs:

	[[~~Image~~:~~EMMAWiki$$TermsAndConcepts$$ForUsers$$Experimental_Factors$~~FactorValuesStress.png]]		[[File:FactorValuesStress.png]]

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	[[~~Image~~:~~EMMAWiki$$TermsAndConcepts$$ForUsers$$Experimental_Factors$~~FactorValuesTime.png]]		[[File:FactorValuesTime.png]]

Admin: 3 revisions

2011-10-26T06:18:54Z

3 revisions

← Older revision	Revision as of 08:18, 26 October 2011
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imported>VirginieMittard at 12:12, 25 August 2005

2005-08-25T12:12:16Z

← Older revision		Revision as of 14:12, 25 August 2005
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	''Experimental Factors'' and ''Factor Values'' are the essential concepts for grouping arrays within an Experiment. An Experimental Factor is a condition (like temperature, time, light intensity, concentration of a substance) of which you want to measure the effect on the organism under study. During the Experiment the ''Factor Value'' of the Factor is controlled by the experimenter (e.g. for the ''Factor'' temperature actual ''Factor Values'' could be 10 degr.C., 20 degr.C., ...). An experiment could also involve many factors with different values. Example: Comparison of the effect of different stresses (Factor: Stress, Values: Stress conditions) during growth over time (Factor: Time, Values: Timepoints of measurements).		''Experimental Factors'' and ''Factor Values'' are the essential concepts for grouping arrays within an Experiment. An Experimental Factor is a condition (like temperature, time, light intensity, concentration of a substance) of which you want to measure the effect on the organism under study. During the Experiment the ''Factor Value'' of the Factor is controlled by the experimenter (e.g. for the ''Factor'' temperature actual ''Factor Values'' could be 10 degr.C., 20 degr.C., ...). An experiment could also involve many factors with different values. Example: Comparison of the effect of different stresses (Factor: Stress, Values: Stress conditions) during growth over time (Factor: Time, Values: Timepoints of measurements).

	Arrays sharing the same unique combination of values can be seen as ~~replikates~~. The choice of Factors, Values and the assignment of Arrays to these constitue the experimental design, and will be used to group replicates for analysis.		Arrays sharing the same unique combination of values can be seen as replicates. The choice of Factors, Values and the assignment of Arrays to these constitue the experimental design, and will be used to group replicates for analysis.

	The following examples illustrate some possible experimental designs:		----
			The following examples illustrate some possible experimental designs:

			[[Image:EMMAWiki$$TermsAndConcepts$$ForUsers$$Experimental_Factors$FactorValuesStress.png]]

			----

			[[Image:EMMAWiki$$TermsAndConcepts$$ForUsers$$Experimental_Factors$FactorValuesTime.png]]

imported>MichaelDondrup at 13:51, 19 April 2005

2005-04-19T13:51:30Z

← Older revision	Revision as of 15:51, 19 April 2005
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Unknown user at 00:00, 1 January 1970

1970-01-01T00:00:00Z

New page

__NOTOC__
= Terms and Concepts: Experimental Factors and Values =

''Experimental Factors'' and ''Factor Values'' are the essential concepts for grouping arrays within an Experiment. An Experimental Factor is a condition (like temperature, time, light intensity, concentration of a substance) of which you want to measure the effect on the organism under study. During the Experiment the ''Factor Value'' of the Factor is controlled by the experimenter (e.g. for the ''Factor'' temperature actual ''Factor Values'' could be 10 degr.C., 20 degr.C., ...). An experiment could also involve many factors with different values. Example: Comparison of the effect of different stresses (Factor: Stress, Values: Stress conditions) during growth over time (Factor: Time, Values: Timepoints of measurements).

Arrays sharing the same unique combination of values can be seen as replikates. The choice of Factors, Values and the assignment of Arrays to these constitue the experimental design, and will be used to group replicates for analysis.

The following examples illustrate some possible experimental designs: