A Cognitive Psychologist Wants to Do an Experiment to Test

question 68

Multiple Choice

A cognitive psychologist wants to do an experiment to test a variable that may influence the memory of elderly people.She has the following constraints: only 12 people are available as possible participants,and the independent variable she plans to manipulate requires the use of a separate group for each of the two conditions.The psychologist has a reliable and valid pretest she can use to evaluate participants' memory prior to the manipulation.Which design is this psychologist likely to use?

• A) random groups design
• B) natural groups design
• C) matched groups design
• D) placebo control design

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Definitions:

Input

Resources used in the production process to create goods or services.

Inputs

Resources such as labor, materials, and capital used in the process of production.

Output

The quantity of goods or services produced by a firm, industry, or economic system.

Diminishing

A principle often observed in economics where additional units of a variable factor increase total output at a decreasing rate.