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🆗Language and Cognition

Phonological Processes

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Why This Matters

Phonological processes are the cognitive "shortcuts" your brain uses to make speech production and perception more efficient. When you're tested on language cognition, you're not just being asked to name these processes—you're being asked to demonstrate that you understand why our speech systems evolved these patterns and how they reveal the relationship between articulatory constraints and mental processing. These processes show up everywhere: in child language acquisition, in historical language change, in speech errors, and in cross-linguistic patterns.

The key concepts you'll need to master include articulatory ease, perceptual distinctiveness, prosodic structure, and cognitive efficiency. Each phonological process represents a solution to a specific problem in speech production or perception. Don't just memorize definitions—know what problem each process solves and be ready to identify examples in novel contexts. If an FRQ asks you to explain why certain sound changes occur, your answer should connect the process to its underlying cognitive or articulatory motivation.


Processes That Simplify Articulation

These processes make speech physically easier to produce by reducing the articulatory "work" required. The underlying principle is motor efficiency—your speech organs prefer smooth, continuous movements over abrupt changes in position or manner.

Assimilation

  • Sounds become more similar to neighboring sounds—this reduces the distance your articulators must travel between segments
  • Can affect place, manner, or voicing—for example, "input" often becomes "imput" as the alveolar /n/ shifts to bilabial /m/ before /p/
  • Most common in connected speech—reveals how cognitive load and speaking rate influence phonological output

Lenition

  • Consonants weaken or "soften" over time—stops may become fricatives, voiced sounds may become approximants
  • Reduces articulatory effort—requires less muscular tension and airflow obstruction
  • Drives historical sound change—Latin "vita" becoming Spanish "vida" shows intervocalic lenition in action

Deletion (Elision)

  • Sounds or syllables are omitted entirely—the ultimate simplification strategy when a segment isn't perceptually critical
  • Extremely common in casual speech—"probably" → "prolly," "comfortable" → "comfterble"
  • Can trigger morphological restructuring—when deletions become permanent, they reshape word forms across generations

Compare: Assimilation vs. Lenition—both simplify articulation, but assimilation changes sounds to match neighbors while lenition weakens sounds regardless of context. On exams, assimilation questions often focus on local phonetic environments, while lenition questions address gradual historical change.


Processes That Enhance Distinctiveness

While some processes simplify production, others prioritize keeping sounds perceptually distinct. These processes prevent confusion by ensuring that similar sounds don't blur together in the speech stream.

Dissimilation

  • Similar sounds become less alike—the opposite of assimilation, triggered when two similar sounds would be confusing or difficult to sequence
  • Often affects liquids and nasals—Latin "peregrinus" became "pilgrim" through dissimilation of the two /r/ sounds
  • Reflects perceptual constraints—your brain actively avoids sound sequences that would be hard to parse

Fortition

  • Sounds become stronger or more forceful—the opposite of lenition, often occurring in positions where clarity matters most
  • Common in stressed syllables and word boundaries—positions where perceptual salience is critical for comprehension
  • Can involve changes in voicing or manner—fricatives may become stops, approximants may become fricatives

Compare: Dissimilation vs. Fortition—both enhance distinctiveness, but dissimilation targets sequences of similar sounds while fortition strengthens sounds in prosodically prominent positions. If an FRQ asks about maintaining perceptual contrast, these are your go-to examples.


Processes That Repair Structure

Some phonological processes exist to fix "illegal" sound combinations or maintain preferred syllable shapes. Languages have templates for acceptable syllable structures, and these processes enforce those templates.

Insertion (Epenthesis)

  • A sound is added to break up prohibited clusters—English speakers often insert a vowel in "athlete" → "ath-uh-lete"
  • Maintains preferred syllable structure—languages that prohibit consonant clusters use epenthesis to create CV (consonant-vowel) syllables
  • Common in loanword adaptation—Japanese adds vowels to English loans: "strike" → "sutoraiku"

Metathesis

  • Sounds swap positions within a word—"ask" pronounced as "aks" in some dialects, or Old English "brid" becoming Modern English "bird"
  • Often resolves articulatory difficulty—certain sound sequences are easier to produce in reversed order
  • Can become lexicalized over time—what starts as a speech error may become the standard pronunciation

Compare: Epenthesis vs. Deletion—both repair syllable structure, but they work in opposite directions. Epenthesis adds segments to break up clusters; deletion removes segments to simplify them. The choice depends on the language's preferred syllable template.


Processes Driven by Harmony and Agreement

These processes spread features across multiple segments, creating phonological consistency within words or phrases. The underlying principle is that certain features "want" to be uniform across a domain.

Vowel Harmony

  • Vowels within a word share features like frontness, backness, or rounding—suffixes change their vowels to match the root
  • Extremely systematic in languages like Turkish and Finnish—all vowels in a word must agree on specified features
  • Reveals morpheme boundaries—harmony patterns help listeners segment continuous speech into meaningful units

Palatalization

  • Consonants shift toward the palate under vowel influence—front vowels like /i/ and /e/ trigger this change in neighboring consonants
  • Responsible for major sound shifts—Latin /k/ before front vowels became /tʃ/ in Italian ("century" vs. "cento")
  • Active in many living languages—Russian consonants systematically palatalize before front vowels

Compare: Vowel Harmony vs. Palatalization—both involve feature spreading, but vowel harmony spreads features among vowels while palatalization spreads vowel features onto consonants. Both demonstrate how segments influence each other across syllable boundaries.


Processes That Add Meaning

Some phonological processes aren't just about sound—they carry grammatical or semantic information. These processes show the interface between phonology and morphology.

Reduplication

  • Part or all of a word is repeated to convey meaning—can signal plurality, intensity, continuity, or other grammatical functions
  • Full vs. partial reduplication—Indonesian "anak-anak" (children) uses full reduplication; Tagalog "sulat" → "susulat" (will write) uses partial
  • Demonstrates phonology-morphology interaction—the repeated material follows phonological rules while serving morphological purposes

Compare: Reduplication vs. Affixation—both add morphological content, but reduplication copies existing material while affixation adds new material. Reduplication is particularly interesting because the "affix" is phonologically dependent on the base.


Quick Reference Table

ConceptBest Examples
Articulatory simplificationAssimilation, Lenition, Deletion
Perceptual distinctivenessDissimilation, Fortition
Syllable structure repairEpenthesis, Metathesis
Feature spreadingVowel Harmony, Palatalization
Morphological markingReduplication
Historical sound changeLenition, Palatalization, Metathesis
Child language patternsAssimilation, Deletion, Reduplication
Cross-linguistic universalsVowel Harmony, Epenthesis, Assimilation

Self-Check Questions

  1. Both assimilation and vowel harmony involve sounds becoming more similar—what distinguishes the domain and triggers of each process?

  2. If a language prohibits consonant clusters but borrows a word like "sport" from English, which phonological process would most likely apply, and why?

  3. Compare lenition and fortition: under what prosodic or positional conditions would you expect each to occur?

  4. A child says "guck" instead of "duck" and "goggy" instead of "doggy"—which phonological process is operating, and what does it reveal about early speech production?

  5. An FRQ asks you to explain how phonological processes can drive historical language change. Which three processes would provide the strongest examples, and what evidence would you cite for each?