In a Study on the Effects of Caffeine on Memory

question 8

Multiple Choice

In a study on the effects of caffeine on memory one group of participants drank a bottle of tasteless water containing 100, 50, or 0 milligrams of caffeine. Another group of drank a bottle of water with no caffeine. The participants assigned to the group that got bottled water with no caffeine represents the _____ in this study.

• A)dependent variable
• B)placebo group
• C)meta-analysis
• D)experimental group

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Definitions:

Long-run Phillips Curve

An economic concept that represents the relationship between inflation and unemployment when the effects of short-term shocks have dissipated, showing no trade-off between inflation and unemployment in the long run.

Natural Rate

A concept in economics referring to the level of unemployment at which there is no cyclical or deficient-demand unemployment. It represents a balance between the supply of labor and job vacancies, considering that some frictional and structural unemployment is inevitable.

Unemployment

The situation in which individuals who are capable of working and are seeking employment are unable to find work.

Expected Inflation

The rate at which prices of goods and services are anticipated to rise over time, as forecasted by consumers, businesses, and economists.