Development of phonetic memory in disabled and normal readers

Area of Science:

• Cognitive Psychology
• Developmental Psychology
• Educational Psychology

Background:

• Phonetic coding in memory is crucial for reading development and comprehension.
• Understanding the developmental trajectory of phonetic coding is essential for identifying reading difficulties.
• Previous research has established the role of phonetic coding in memory tasks for typical readers.

Purpose of the Study:

• To investigate the development of phonetic coding in memory among normal and disabled readers.
• To compare the phonetic coding abilities of different age groups and reading abilities.
• To explore the relationship between phonetic coding, reading skill, and cognitive abilities.

Main Methods:

• A recognition memory task adapted from Mark et al. (1977) was used to measure false-positive errors.
• Participants included 141 pairs of normal and disabled readers aged 7.8 to 16.8 years.
• Tests included auditory WISC-R digit span recall and phonological nonword decoding.

Main Results:

• Younger normal readers showed a larger difference between rhyming and nonrhyming false-positive errors, replicating previous findings.
• Older disabled readers' phonetic effect was comparable to younger normal readers, indicating a developmental lag.
• Normal readers' phonetic effect declined with age in the recognition task, but they maintained advantages in digit span and nonword decoding.

Conclusions:

• Disabled readers exhibit a developmental lag in phonetic coding in memory compared to their normal-reading peers.
• The decline in phonetic effect among normal readers may be attributed to increased precision in their phonetic codes.
• Phonetic coding abilities continue to develop and refine throughout childhood and adolescence, with variations based on reading ability.