Evaluating Operational Definitions Alyssa Is Studying the Effectiveness of a New

question 55

Multiple Choice

Evaluating Operational Definitions Alyssa is studying the effectiveness of a new method of strength training.
If she measures the experimental group before "happy hour" and the control
Group after "happy hour," her results would be confounded by a ____ threat.

• A)history
• B)maturation
• C)selection
• D)testing

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Definitions:

Deltoid Muscle

The muscle that caps the shoulder, involved in arm rotation and preventing dislocation of the shoulder joint.

Biceps Brachii

A muscle located in the upper arm that is responsible for flexing the forearm at the elbow.

Triceps Brachii

A large muscle on the back of the upper arm responsible for extending the elbow and is composed of three heads.

Tensor Fascia Latae

A muscle of the thigh that helps to stabilize and move the hip and knee, and is involved in the iliotibial band.