Answer:
C)caffeine is the independent variable
Explanation:
Caffeine is the independent variable and word recall is the dependent variable. Word recall is dependent on the presence or absence of caffeine.
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In psychophysics, experiments seek to determine whether the subject can detect a stimulus, identify it, differentiate between it and another stimulus, or describe the magnitude or nature of this difference. Software for psychophysical experimentation is overviewed by Strasburger.
<span>Kenya, Nigeria, and South Africa each have democratic governments
</span>
<span>In a republic such as Kenya, people elect others to make laws for them
</span>
<span>In Kenya, all citizens above the age of 18 are granted suffrage
</span>
<span>In South Africa, citizens do not directly elect the President
</span>
<span> South Africa is classified as a Parliamentary Democracy</span>
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