My Body and Me: Experimental design
Unit Essential Question(s): How do scientist problem solve and justify their solution or explanation?
Concept: Experimental Design
LEQ: How do scientist solve problems?
Elements of Good Experimental Design
In order for an experiment to be well thought out, it must include the Elements of Good Experimental Design. The experiment must:
1- Builds on previous research
2- Describe all steps in the procedure clearly and completely
3- Describe all data to be collected
4- Keep all variables, except the ones being tested, the same
5- Include a control (or placebo) for comparison
6- Uses an appropriate group of subjects
7- Include a large sample size (number of people or trials tested)
8- Can be reproduced by other investigators to give similar results.
9- Respect all human and animal subjects
* Elements may vary, depending on the problem being studied*
In order for an experiment to be well thought out, it must include the Elements of Good Experimental Design. The experiment must:
1- Builds on previous research
2- Describe all steps in the procedure clearly and completely
3- Describe all data to be collected
4- Keep all variables, except the ones being tested, the same
5- Include a control (or placebo) for comparison
6- Uses an appropriate group of subjects
7- Include a large sample size (number of people or trials tested)
8- Can be reproduced by other investigators to give similar results.
9- Respect all human and animal subjects
* Elements may vary, depending on the problem being studied*
Leq: How do you gather evidence to support or disprove a hypothesis?
Observation vs Inference
Observations are when we use our five senses (seeing, hearing, touching, tasting, and smelling) to collect information. Often times, scientists are able to make an inference, or come up with an explanation, for what they observe.
Observations are when we use our five senses (seeing, hearing, touching, tasting, and smelling) to collect information. Often times, scientists are able to make an inference, or come up with an explanation, for what they observe.
Variables
Manipulated (Independent) Variable- What "I" change, or manipulate; what is being tested (Input)
Responding (Dependent) Variable- What is being measured; observe how it "responds" (Output)
Controlled Variable- Any other factors that could effect the results should be kept the same, or controlled
Manipulated (Independent) Variable- What "I" change, or manipulate; what is being tested (Input)
Responding (Dependent) Variable- What is being measured; observe how it "responds" (Output)
Controlled Variable- Any other factors that could effect the results should be kept the same, or controlled
Placebo Effect
A reaction to a placebo manifested by a lessening of symptoms or the production of anticipated side effects.
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