Comprehensive Phonetics and Phonology – Speech Sounds, Articulatory Features, and Developmental Stages Practice Test

Percent Consonants Correct (PCC) measures how many consonants a child produces in connected speech match the adult target. It’s calculated by counting correct consonant productions over the total consonants attempted, then multiplying by 100. In typical development, PCC increases as speech becomes more accurate. Around age two, it’s common to see about 70% of consonants produced correctly, reflecting ongoing refinement and frequent substitutions or omissions. By age three, PCC typically rises into the high 90s, and by age four it’s usually in the mid-to-high 90s, approaching adult-like accuracy. So a value around 70% at age two aligns with expected development, while the other options would imply unusually high accuracy for that age or lower accuracy at much later ages.