Which subtype is defined by persistent articulation errors such as distortions or isolated substitutions?

Which subtype is defined by persistent articulation errors such as distortions or isolated substitutions?

• A. Articulation Disorder
• B. Consistent Phonological Disorder
• C. Inconsistent Phonological Disorder
• D. Childhood Apraxia of Speech

Answer: (B)

Distinguishing articulation-based errors from patterns in the sound system is the key idea here. When a child shows distortions or isolated substitutions, the problem is primarily at the level of producing individual speech sounds—a motor-articulatory issue. That points to an articulation disorder, where the errors are about how a specific sound is formed rather than about general rules governing many sounds. If the difficulties were phonological in nature, you’d expect systematic patterns across sounds—substitutions or omissions that follow a predictable rule across a range of vowels and consonants, not just isolated instances. In a consistently patterned phonological disorder, those patterns would be stable across contexts; in an inconsistent phonological disorder, the same target might appear correctly in some words but be misproduced in others, which isn’t captured by “distortions or isolated substitutions” alone. Childhood apraxia of speech would bring additional signs such as prominent sequencing problems, noticeable groping, and highly variable or inconsistent errors that go beyond simple distortions. So the description best matches an articulation disorder, where the core issue is the motor production of sounds rather than a systematic reorganization of the phonological system.

Distinguishing articulation-based errors from patterns in the sound system is the key idea here. When a child shows distortions or isolated substitutions, the problem is primarily at the level of producing individual speech sounds—a motor-articulatory issue. That points to an articulation disorder, where the errors are about how a specific sound is formed rather than about general rules governing many sounds.

If the difficulties were phonological in nature, you’d expect systematic patterns across sounds—substitutions or omissions that follow a predictable rule across a range of vowels and consonants, not just isolated instances. In a consistently patterned phonological disorder, those patterns would be stable across contexts; in an inconsistent phonological disorder, the same target might appear correctly in some words but be misproduced in others, which isn’t captured by “distortions or isolated substitutions” alone. Childhood apraxia of speech would bring additional signs such as prominent sequencing problems, noticeable groping, and highly variable or inconsistent errors that go beyond simple distortions. So the description best matches an articulation disorder, where the core issue is the motor production of sounds rather than a systematic reorganization of the phonological system.