A Nursing Student Is Reviewing a Research Study in Which

question 18

Multiple Choice

A nursing student is reviewing a research study in which researchers used pretest/posttest design to examine the effect of an AIDS education intervention on teenagers' knowledge level over a school year.What threats to internal validity could be present? (Select all that apply.)

• A) Maturation
• B) Selection effects
• C) Reactivity
• D) Hawthorne effect
• E) Testing

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Definitions:

Inductive Reactance

The opposition that inductors present to current change in AC circuits, measured in Ohms.

Power Factor

A dimensionless number between -1 and 1 that represents the phase difference between the voltage and current in an alternating current (AC) electrical circuit.

Parallel Circuit

A circuit configuration where components are connected across each other's points, allowing multiple paths for the current to flow.

Inductive Reactance

A property of an electrical circuit element that opposes the change in current flow, especially notable in coils or inductors, affected by frequency and inductance.