The reading skills of 16% of children fall below the mean range for their age, and
5% of children have significant and severe reading problems. Phonics training is one
of the most common reading treatments used with poor readers, particularly children.
To measure the effect of phonics training and explore the impact of various factors,
such as training duration and training group size, that might moderate the effect
of phonics training on literacy‐related skills in English‐speaking poor readers. We
searched CENTRAL, MEDLINE, Embase, 12 other databases, and three trials registers
up to May 2018. We also searched reference lists of included studies and contacted
experts in the field to identify additional studies. We included studies that used
randomisation, quasi‐randomisation, or minimisation to allocate participants to a
phonics intervention group (phonics training only or phonics training plus one other
literacy‐related skill) or a control group (no training or non‐literacy training).
Participants were English‐speaking poor readers with word reading one standard deviation
below the appropriate level for their age (children, adolescents, and adults) or one
grade or year below the appropriate level (children only), for no known reason. Participants
had no known comorbid developmental disorder, or physical, neurological, or emotional
problem. We used standard methodological procedures expected by Cochrane. We included
14 studies with 923 participants in this review. Studies took place in Australia,
Canada, the UK, and the USA. Six of the 14 included studies were funded by government
agencies and one was funded by a university grant. The rest were funded by charitable
foundations or trusts. Each study compared phonics training alone, or in conjunction
with one other reading‐related skill, to either no training (i.e. treatment as usual)
or alterative training (e.g. maths). Participants were English‐speaking children or
adolescents, of low and middle socioeconomic status, whose reading was one year, one
grade, or one standard deviation below the level expected for their age or grade for
no known reason. Phonics training varied between studies in intensity (up to four
hours per week), duration (up to seven months), training group size (individual and
small groups), and delivery (human and computer). We measured the effect of phonics
training on seven primary outcomes (mixed/regular word reading accuracy, non‐word
reading accuracy, irregular word reading accuracy, mixed/regular word reading fluency,
non‐word reading fluency, reading comprehension, and spelling). We judged all studies
to be at low risk of bias for most risk criteria, and used the GRADE approach to assess
the quality of the evidence. There was low‐quality evidence that phonics training
may have improved poor readers' accuracy for reading real and novel words that follow
the letter‐sound rules (standardised mean difference (SMD) 0.51, 95% confidence interval
(CI) 0.13 to 0.90; 11 studies, 701 participants), and their accuracy for reading words
that did not follow these rules (SMD 0.67, 95% CI 0.26 to 1.07; 10 studies, 682 participants).
There was moderate‐quality evidence that phonics training probably improved English‐speaking
poor readers' fluency for reading words that followed the letter‐sounds rules (SMD
0.45, 95% CI 0.19 to 0.72; 4 studies, 224 participants), and non‐word reading fluency
(SMD 0.39, 95% CI 0.10 to 0.68; 3 studies, 188 participants), as well as their accuracy
for reading words that did not follow these rules (SMD 0.84, 95% CI 0.30 to 1.39;
4 studies, 294 participants). In addition, there was low‐quality evidence that phonics
training may have improved poor readers' spelling (SMD 0.47, 95% CI –0.07 to 1.01;
3 studies, 158 participants), but only slightly improve their reading comprehension
(SMD 0.28, 95% CI –0.07 to 0.62; 5 studies, 343 participants). Phonics training appears
to be effective for improving literacy‐related skills, particularly reading fluency
of words and non‐words, and accuracy of reading irregular words. More studies are
needed to improve the precision of outcomes, including word and non‐word reading accuracy,
reading comprehension, spelling, letter‐sound knowledge, and phonological output.
More data are also needed to determine if phonics training in English‐speaking poor
readers is moderated by factors such as training type, intensity, duration, group
size, or administrator. Phonics training for English‐speaking poor readers Review
question Does phonics training improve literacy‐related skills in English‐speaking
poor readers. Background The reading skills of 16% of children fall below the average
range for their age, and 5% of children have significant and severe reading problems.
Poor reading is associated with higher risk of school dropout, as well as anxiety,
depression, low self‐concept, self‐harm and suicide. Therefore, it is important to
provide poor readers with early and effective help. 'Phonics' training is one of the
most common reading treatments used with poor readers, particularly children. Phonics
training teaches readers to: identify each letter or letter‐cluster in a new word
(e.g. S H I P); transpose each letter or letter‐cluster into its corresponding speech
sound ('sh' 'i' 'p'); and blend those speech sounds into a word ('ship'). Study characteristics
The search, updated in May 2018, identified 14 studies that tested phonics training
in 923 English‐speaking poor readers. The studies took place in Australia, Canada,
the UK, and the USA. Six of the 14 included studies were funded by government agencies
and one was funded by a university grant. The rest were funded by charitable foundations
or trusts. Each study compared phonics training alone, or with one other reading‐related
skill, to either no training (i.e. treatment as usual) or alterative training (e.g.
maths). Participants were English‐speaking children or adolescents, of low and middle
socioeconomic status, whose reading was one year, one grade, or one standard deviation
(distance from the average) below the level expected for their age or grade for no
known reason. Phonics training varied between studies in frequency (up to four hours
per week), duration (up to seven months), training group size (individual and small
groups), and delivery (human and computer). We measured the effect of phonics training
on poor readers' ability to read words and novel words (non‐words) accurately and
fluently, as well as their comprehension of text, and their knowledge of letter‐sound
rules (letter‐sound knowledge) and speech sounds (phonological output). Key results
We found that phonics training in English‐speaking poor readers probably improved
irregular word reading accuracy, mixed/regular word reading fluency, and non‐word
reading fluency. It may also have improved mixed/regular word reading accuracy, non‐word
reading accuracy, reading comprehension, spelling, letter‐sound knowledge, and phonological
output. Quality of the evidence The overall quality of the evidence ranged from low
to moderate. This was primarily due to large differences in the size of phonics‐training
effects between studies. More studies are needed to improve the precision of the outcomes.
Conclusions The evidence suggests that phonics training can improve literacy in English‐speaking
poor readers. The positive effects of phonics training on all reading‐related outcomes
suggests that phonics training is not harmful for poor readers.