You Are Conducting a Study Looking at the Effects of Caffeine

question 96

Multiple Choice

You are conducting a study looking at the effects of caffeine on attention in 7-year-old children. In this study, you have three groups of children, all age 7, with each group consisting of equal numbers of boys and girls. Group 1 drinks 6 oz. of cola; Group 2 drinks 6 oz. of caffeine-free cola; Group 3 drinks 6 oz. of water. Thirty minutes after the children drink, you ask them to complete a 100-piece puzzle. You measure the amount of time it takes each child to do this task. In this study, the dependent variable is

• A) the type of drink.
• B) the amount of time to complete the puzzle.
• C) attention.
• D) the 100-piece puzzle.

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Definitions:

Oxygen

A chemical element, represented by the symbol O, essential for most life forms' respiration and is a component of air.

Oxygen-demanding Waste

Wastes, typically organic in nature, that reduce the amount of dissolved oxygen in water as they decompose, affecting aquatic life and water quality.

Water-soluble

A characteristic of substances that can dissolve in water, making them capable of being transported or utilized in various biological and environmental processes.

Fertilizer

A chemical or natural substance added to soil or land to increase its fertility, promoting plant growth.