Phonological Assessment Instrument: evidence of reliability

Area of Science:

• Speech-Language Pathology
• Linguistics
• Psychometrics

Background:

• Accurate assessment of phonological systems in children is crucial for early intervention.
• The Phonological Assessment Instrument requires rigorous validation for clinical and research use.
• Evaluating the reliability and validity of assessment tools ensures accurate diagnostic outcomes.

Purpose of the Study:

• To establish the intra- and inter-rater reliability of the Phonological Assessment Instrument.
• To determine the internal consistency of the Phonological Assessment Instrument scores.
• To validate the Phonological Assessment Instrument for clinical practice in Brazil.

Main Methods:

• 179 speech samples from children aged 5 to 8 years 11 months were analyzed.
• Expert judges performed phonetic transcriptions, and scores were compared for reliability.
• Cronbach's Alpha and Intraclass Correlation Coefficient were used for statistical analysis.

Main Results:

• The Phonological Assessment Instrument exhibited high internal consistency.
• Excellent reliability was found for assessing Brazilian Portuguese phonemes.
• Adequate agreement was observed among expert judges regarding instrument scores.

Conclusions:

• The Phonological Assessment Instrument provides robust evidence of reliability.
• It is a dependable tool for evaluating the phonological system of Brazilian children.
• The instrument is recommended for use in Brazilian research and clinical settings.