Experimental Design, Command Terms, and Processes of Life

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14 Terms

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independent variable

the variable that is changed or controlled by the researcher to assess its effect on another variable

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dependent variable

the variable that is measured or observed in an experiment, which is expected to change when the independent variable is altered.

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control variables

the variables that do not change across different trials

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control group

a group of trials that do not receive the experimental treatment

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placebo

term for control group in medical trials

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double blind experiment

where the participants/experimenters don’t know if they’re receiving/administering a placebo or the experimental treatment, minimizing bias in results.

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3 ways a scientist can increase the reliability of their experiment

  1. increase random sample population

  2. do multiple trials

  3. limit assumptions

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micro-

10-6

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kilo-

10³

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nano-

10-9

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centi-

10-2

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milli

10-3

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continuous variable

can take on any value within a range

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discrete variable

can take on specific, separate values with no in-between