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Visible Learning™
Visible Learning MetaX
Version 1.4 – Updated February 2026

Phonological awareness

Overview

  • Influence: Phonological awareness
  • Domain: Curricula
  • Sub-Domain: Reading, writing and the arts
  • Potential to Accelerate Student Achievement: Potential to considerably accelerate
  • Influence Definition: Phonological awareness is a broad skill which involves assessing and improving phonemic awareness (a subset of phonological awareness isolating the sounds in a word), such as phoneme isolation, identification, categorization, blending; segmentation, and deletion. Phonological awareness is an umbrella term that encompasses the awareness and ability to manipulate spoken parts of words or sentences including word awareness, syllables, onset and rhyme.

Evidence

  • Number of meta-analyses: 14
  • Number of studies: 768
  • Number of students: 88,254
  • Number of effects: 6,401
  • Weighted mean effect size: 0.83
  • Robustness index: 5

Meta-Analyses

Meta-Analyses
Journal Title Author Article Name Year Published Variable Number of Studies Number of Students Number of Effects Effect Size
Merrill-Palmer Quarterly Wagner Causal relations between the development of phonological processing abilities and the acquisition of reading skills: a meta-analysis 1988 Phonological processing abilities 16 NA 1,766 0.38
Journal of Educational Psychology Bus & van IJzendoorn Phonological awareness and early reading: A meta-analysis of experimental training studies 1999 Phonological awareness training 70 5,408 85 0.73
Review of Educational Research Swanson, Trainin, Necoechea, & Hammill Rapid naming, phonological awareness, and reading: A meta-analysis of the correlation evidence 2003 Rapid naming, phonological awareness 35 3,568 2,257 0.93
Journal of Educational Psychology Araujo, Reis, Petersson, & Faisca Rapid Automatized Naming and Reading Performance: A Meta-Analysis 2015 Rapid automatized naming and reading 137 28,826 857 0.95
Journal of Deaf Studies and Deaf Education Mayberry, del Guidice, & Lieberman Reading achievement in relation to phonological coding and awareness in deaf readers: A meta-analysis 2011 Phonological coding in deaf readers 57 NA 57 0.35
Zeitschrift fur Entwicklungspsychologie und Padagogische Psychologie Fischer & Pfost How Effective Are Trainings of Phonological Awareness? A Meta-Analysis of German Language Training Programs and Their Effects on he Acquisition of Reading and Spelling Skills 2015 Phonological awareness training 19 NA 22 0.36
Journal of Educational Psychology Ruan, Georgiou, Song, Li, & Shu Does writing system influence the associations between phonological awareness, morphological awareness, and reading? A meta-analysis 2018 Phonological and morphological awareness in English and Chinese 64 18,420 127 0.87
Studies in Psychology and Behavior Pan, Deng, Lin, & Liu A meta-analysis of the relationship between Chinese students' English phonological awareness and reading achievement. 2019 Phonological awareness & achievement 53 NA 53 0.77
Journal of Educational Psychology Yang, Yan, Ruan, Ku, Lo, Peng, & McBride Relations among phonological processing skills and mathematics in children: A meta-analysis. 2021 Phonological processing on math achievement 94 NA 826 0.70
Frontiers in Psychology Chen & Zhao Reading-related skills associated with acquisition of Chinese as a second/foreign language: A meta-analysis.  2022 Phonological skills in Chinese reading 42 1,103 79 0.90
Language Learning Míguez-Álvarez, Cuevas-Alonso & Saavedra Relationships between phonological awareness and reading in Spanish: A meta-analysis. 2022 Phonological skills in Spanish 47 7,956 47 0.80
Journal of Behavioral Education Cooper, Hebert, Goodrich, Leiva, Lin, Peng, & Nelson Effects of Automaticity Training on Reading Performance: A Meta-Analysis 2022 Automaticity training 11 NA 83 0.28
Scientific Studies of Reading Erbeli, Rice, Xu, Bishop, & Goodrich A Meta-Analysis on the Optimal Cumulative Dosage of Early Phonemic Awareness Instruction.  2024 Phonological instruction at maximum dosage (10 hours) 16 1,155 35 0.74
Journal of Educational Psychology Zhang, Ke, & Mo Morphology in reading comprehension among school-aged readers of English: A synthesis and meta-analytic structural equation modeling study.  2023 Morphological teaching 107 21,818 107 1.27
TOTAL/AVERAGE 768 88,254 6,401 0.72
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