The Major Threat to the Internal Validity of Research on Articulation

question 129

Multiple Choice

The major threat to the internal validity of research on articulation problems in young children is

• A) regression.
• B) instrumentation.
• C) mortality.
• D) maturation.
• E) selection.

---

Definitions:

Scientific Theory

A well-substantiated explanation of some aspect of the natural world, based on a body of facts that have been repeatedly confirmed through observation and experiment.

System Of Assumptions

A coherent collection of beliefs and theories that form the basis for a particular methodology or approach to understanding and interpreting the world.

Personal Opinion

An individual's specific thoughts or beliefs about a subject, which may not be based on fact or knowledge and can vary greatly from person to person.

Empirical Proof

Evidence that serves to either support or counter a scientific theory or hypothesis, obtained through direct observation or experimentation.