Speech has two aspects, knowledge (phonology) and expression (articulation). During the development of phonology, children make systematic
errors, targeting certain phonological element classes, called phonological
error patterns which later on are modified and suppressed. These patterns may
be normal or unusual, and are classified as syllable structure, substitution
and assimilation error patterns. Assessment of these error patterns by either
spontaneous sample speech or single word test is a golden step for
determination of age-appropriate, delayed, gross-included and unusual
patterns to help in diagnosis of phonological disorders which comprise the
largest group of speech sound disorders. Difference between phonology and
articulation; normal speech development; overview of phonological error
patterns; approach to diagnosis of speech sound disorders are discussed in
this book. This book is a guide for phoniatrician
[https://www.google.com/search?safe=strict&q=phoniatrician&spell=1&sa=X&ved=0ahUKEwizhPDV0s_fAhUGWxUIHWKwDDYQBQgqKAA]s
and speech-language pathologists for the better understanding of phonological
error patterns and comprehensive diagnosis of speech sound disorders.
