A Researcher Is Investigating the Effects of Caffeine Consumption on Student

question 172

Multiple Choice

A researcher is investigating the effects of caffeine consumption on student writing performance.  Because the researcher will evaluate both the speed of assignment completion and the number of grammatical errors, she will need to include more than one _____ variable in her study.

• A)independent
• B)dependent
• C)confounding
• D)extraneous

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Definitions:

Processing Speed

The rate at which an individual can perceive, understand, and respond to information or stimuli.

Capacity

The ability to hold, produce, or comprehend something in mind; potential or maximum output.

Siegler

A researcher known for contributions in the field of developmental psychology, particularly regarding children's cognitive development and problem-solving strategies.

Cognitive Skills

Mental abilities involved in processing information, understanding concepts, solving problems, and making decisions.