Difference between revisions of "Valid"
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: An [[experiment]] may be made '''invalid''' by not using [[Control Variable|control variable]]s as they may affect the [[results]] instead of the [[Independent Variable|independent variable]]. | : An [[experiment]] may be made '''invalid''' by not using [[Control Variable|control variable]]s as they may affect the [[results]] instead of the [[Independent Variable|independent variable]]. | ||
: A [[conclusion]] may also be [[valid]] or [[valid|invalid]] depending on whether the [[conclusion]] fits the [[results]] that were given. | : A [[conclusion]] may also be [[valid]] or [[valid|invalid]] depending on whether the [[conclusion]] fits the [[results]] that were given. | ||
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===Examples=== | ===Examples=== | ||
Revision as of 10:49, 21 March 2019
Contents
Key Stage 4
Meaning
Validity is whether a method produces results which test the hypothesis.
About Validity
- A valid experiment is one which tests the hypothesis posed.
- An invalid experiment would be one which does not test the hypothesis.
- An experiment may be made invalid by not using control variables as they may affect the results instead of the independent variable.
- A conclusion may also be valid or invalid depending on whether the conclusion fits the results that were given.
Examples
Valid Experiment
- Hypothesis - The extension of a spring is directly proportional to the force applied to the spring.
- Method - Attach different known weights to the spring and measure the extension of the spring.
Invalid Experiment
- Hypothesis - The extension of a spring is directly proportional to the force applied to the spring.
- Invalid Method 1 - Attach different known weights to an elastic band and measure the extension of the elastic band.