Peg Gives Everyone Participating in an Experiment a Pretest Which

question 36

Multiple Choice

Peg gives everyone participating in an experiment a pretest which measures attitudes toward the brand.When she examines this data,she notices problems with several of the questions.She revises these questions prior to their use on the post-test.This change could result in ________ threats to internal validity.

• A)Interaction
• B)Testing
• C)Instrumentation
• D)Historical
• E)Researcher bias

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Definitions:

Deaths

The cessation of all biological functions that sustain a living organism, marking the end of an organism's life.

Climax Community

In ecology, community that results when succession has come to an end.

Rainfall

The total amount of precipitation, including rain, snow, sleet, or hail, that falls to the ground.

Ecologist

A scientist who studies the relationships between living organisms and their environment.