Stages of Language Development

• Language development follows a universal sequence.

Pre-linguistic Stage (0-12 months)

• The term "pre-linguistic" implies a lack of awareness of language, which is misleading.
  • Observation: Babies respond to language even before they can speak.
  • Synchronization: Babies match their body movements to the speech they hear.
    • Example: Comforting a fussy baby by speaking slowly leads to synchronized movement.
  • Preference for familiar voices: Babies show a preference for their mother's voice over other voices.
  • Brain activity: Increased electrical activity in the left hemisphere indicates sensitivity to language.

Vocalizations in Pre-linguistic Phase

• Types of Vocalizations:
  1. Crying: The first sound babies make, indicating a need.
     • Communicates a negative state (hunger, discomfort, boredom).
     • Physiological effects on parents include increased blood pressure and irregular breathing.
     • Responding to cries helps the infant establish trust and reduces future crying.
  2. Cooing: Occurs around 1-2 months.
     • Vowel-like sounds (e.g., "ah", "ee") indicating happiness.
     • Reassures parents that the baby is not perpetually unhappy.
  3. Babbling: Involves consonant-vowel combinations; starts around 6 months.
     • Examples include "goo" or repetitive sounds like "da da".
     • All babies sound the same globally during the babbling stage.

Holophrastic Stage (around 12 months)

• First Words: Mark the transition into the holophrastic stage, where one word conveys a range of meanings.
  • Significance:
  • Babies express recognition that objects have names.
  • Example: The first word could be unique to a child's context (e.g., "dodo" for dog).
  • Holophrases are economical—they convey a lot of meaning with a single word.
• Early vocabulary consists of familiar terms and significant objects in the child's environment.

Vocabulary Growth

• Initially, vocabulary acquisition is slow and laborious.
• Vocabulary Milestones:
  • By 20 months: Approximately 50 words.
  • By 24 months: Average of 186 words, indicating a vocabulary explosion.

Two-word Utterances (around 18 months)

• Toddlers start combining words to express basic ideas.
• Types of combinations include:
  • Naming (e.g., "dodo")
  • Indicating possession (e.g., "my dog")
  • Asking questions (e.g., "Where daddy?")
  • Modifying (e.g., "big boy")

Communicative Competence (by 3 years of age)

• By this age, most children have achieved communicative competence:
  • Can understand and convey most ideas effectively.
  • Vocabulary continues to grow through preschool years.

Language Rules and Exceptions

• All languages possess transformational rules.
  • Examples:
  • Plural form (adding "-s" or "-es")
  • Past tense (adding "-d" or "-ed")
• Irregular Forms: Exceptions to regular grammatical rules.
  • Examples:
  • "tooth" becomes "teeth" (not "tooths")
  • "to break" becomes "broke" (not "breaked")

Over-regularization Phenomenon

• A typical error made by toddlers when learning irregular forms.
  • Sequence of correctness:
    1. Correct usage of irregular forms.
       • Example: "She broke her teeth."
    2. Incorrect usage as they apply regular rules to exceptions
       • Example: "The beast takes her away" instead of "took".
    3. Back to correct usage, showing mastery of language rules.
• Understanding this phenomenon is crucial for recognizing language acquisition in children.