Reading
Do weaker teen readers use rhythm and pitch less clearly in speech?
Open access · cc by · source: Europe PMC
Teenagers who decode words well but understand text poorly lengthened words at phrase boundaries less than good comprehenders when copying spoken sentences, suggesting weaker use of prosody to mark sentence structure.
Study at a glance
- Design
- Case-control — Two groups selected on reading comprehension (poor vs good) but matched on decoding, age and gender, both performing the same sentence-imitation task; acoustic measures analysed with mixed-effects regressions
- N
- N=32 · 32 high-school students analysed (16 specifically poor comprehenders, 16 controls), selected from 49 who completed the experiment; each imitated 258 sentences
- Population
- American English-speaking high-school students aged 13-19 from Connecticut with at least average word decoding and no diagnosed reading disability
- Outcome
- Pitch (F0 slope, pitch range) and normalised word duration at syntactic boundaries in imitated sentences
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Key findings
Both groups reproduced the basic expected patterns, such as a pitch fall on statements and a rise on yes-no questions, with no group difference there. The clearest difference was in timing: across all three constructions that contain phrase boundaries, controls lengthened boundary words relative to non-boundary words more than poor comprehenders did. Controls also showed a larger pitch difference at relative-clause boundaries, while other pitch differences were only numerical and non-significant; the predicted extra pitch variation on quotes did not appear in either group.
Methodology
From a larger group of high-school students, the researchers picked 16 'specifically poor comprehenders' (normal word decoding, low reading comprehension) and 16 controls matched on decoding, age and gender. Each student heard a model speaker say sentences of six types (statements, yes-no questions, quotes, ambiguous and unambiguous lists, and relative clauses) and imitated the prosody aloud, with the text on screen. Pitch and word duration were extracted from the recordings and compared between groups.
Limitations
The design is correlational, so it cannot show whether weak prosody causes poor comprehension or the reverse; the implicit-prosody explanation is the authors' interpretation, not something they tested with silent reading. The groups were small (16 each), and poor comprehenders might simply be worse at imitation because of working memory or executive differences, which the authors did not measure. The imitation task gave everyone a model to copy, which the authors say probably hid pitch differences that would appear in ordinary reading aloud.
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