OAE Foundations of Reading (190)

Phonetics is the scientific study of speech sounds. It examines how humans produce, transmit, and perceive sounds used in language. For reading instruction, phonetics provides the foundation for understanding the relationship between spoken and written language.

Speech sounds are produced through the coordinated action of the respiratory system, larynx, and articulatory organs. Air from the lungs passes through the vocal folds in the larynx, which may vibrate to produce voiced sounds or remain open for voiceless sounds. The resulting airstream is then shaped by the tongue, lips, teeth, palate, and other structures to create distinct speech sounds.

Consonant sounds are classified by three primary features. Place of articulation refers to where in the vocal tract the sound is produced. Bilabial sounds like /p/, /b/, and /m/ are made with both lips. Labiodental sounds like /f/ and /v/ involve the lower lip and upper teeth. Dental sounds use the tongue and teeth. Alveolar sounds like /t/, /d/, /n/, /s/, and /z/ involve the tongue and the alveolar ridge behind the upper teeth. Palatal sounds like /ʃ/ and /ʒ/ use the tongue and hard palate. Velar sounds like /k/, /g/, and /ŋ/ involve the tongue and soft palate. Glottal sounds like /h/ are produced at the vocal folds.

Manner of articulation describes how airflow is modified. Stops or plosives like /p/, /b/, /t/, /d/, /k/, and /g/ involve complete closure followed by release. Fricatives like /f/, /v/, /s/, /z/, /ʃ/, /ʒ/, and /h/ involve turbulent airflow through a narrow opening. Affricates like /tʃ/ and /dʒ/ combine a stop with a fricative. Nasals like /m/, /n/, and /ŋ/ direct airflow through the nasal cavity. Liquids include /l/ and /r/. Glides or semivowels include /w/ and /j/.

Voicing indicates whether the vocal folds vibrate during production. Voiced consonants include /b/, /d/, /g/, /v/, /z/, and /ʒ/. Voiceless consonants include /p/, /t/, /k/, /f/, /s/, and /ʃ/.

Vowel sounds are classified by tongue height, tongue advancement, and lip rounding. High vowels like /i/ and /u/ have the tongue positioned near the palate. Mid vowels like /e/, /ə/, and /o/ have intermediate tongue height. Low vowels like /æ/ and /ɑ/ have the tongue positioned low in the mouth. Front vowels like /i/, /e/, and /æ/ have the tongue advanced toward the front. Central vowels like /ə/ and /ʌ/ have the tongue in a neutral position. Back vowels like /u/, /o/, and /ɑ/ have the tongue retracted. Rounded vowels like /u/ and /o/ involve lip rounding while unrounded vowels like /i/ and /æ/ do not.

English contains approximately 44 phonemes, though the exact count varies by dialect. These include about 24 consonant phonemes and 20 vowel phonemes including diphthongs. Diphthongs are vowel sounds that glide from one position to another within a single syllable, such as /aɪ/ in "ride," /aʊ/ in "out," and /ɔɪ/ in "boy."

Phonological awareness is a broader term that encompasses awareness of all sound units in language, including words, syllables, onsets and rimes, and phonemes. Phonemic awareness is the most sophisticated level of phonological awareness.

Word awareness involves recognizing that sentences are made up of individual words. This can be assessed by having children count words in spoken sentences or tap for each word they hear. Syllable awareness involves recognizing syllable units within words. Children might clap for each syllable in "elephant" or sort pictures by the number of syllables in their names.

Onset-rime awareness involves recognizing the onset, which is the consonant or consonant cluster before the vowel, and the rime, which is the vowel and any consonants that follow. In "cat," the onset is /k/ and the rime is /æt/. Rhyming activities develop onset-rime awareness. Rhyming words share the same rime, like "cat," "bat," and "hat."

Research consistently demonstrates that phonological awareness instruction improves reading outcomes, particularly for struggling readers and students at risk for reading difficulties. The National Reading Panel identified phonemic awareness as one of the five essential components of effective reading instruction.

Phonemic awareness is the ability to hear, identify, and manipulate individual phonemes in spoken words. It is an auditory skill that does not involve print. Phonemic awareness is a critical predictor of reading success and a necessary foundation for phonics instruction.

Phonemic awareness develops along a continuum of increasing complexity. The earliest skill is phoneme isolation, which involves identifying individual sounds in words. A child might identify that the first sound in "cat" is /k/. Phoneme identity involves recognizing the same sound in different words. A child might recognize that "cat," "cup," and "kite" all begin with /k/.

Phoneme categorization involves identifying which word in a set has a different sound. Given "cat," "car," and "dog," a child would identify "dog" as having a different beginning sound. Phoneme blending involves combining individual phonemes to form a word. A child hearing /k/-/æ/-/t/ would blend these to say "cat." Phoneme segmentation involves breaking a word into its individual phonemes. A child would segment "cat" into /k/-/æ/-/t/.

Phoneme deletion involves removing a phoneme and saying the remaining word. Removing /k/ from "cat" produces "at." Phoneme addition involves adding a phoneme to create a new word. Adding /s/ to the beginning of "top" produces "stop." Phoneme substitution involves replacing one phoneme with another. Changing the /k/ in "cat" to /b/ produces "bat."

Instruction in phonemic awareness should be explicit, systematic, and cumulative. Effective activities include sound sorting, sound matching, blending games, segmentation activities with manipulatives, and rhyming exercises. Phonemic awareness instruction is most effective when it focuses on one or two skills at a time and when it eventually connects to letters.