What Works for Children with Literacy Difficulties? - Digital ...

A.1 Introduction to the evaluation data
The entries below are organised, as far as possible, in the order shown in Table A.1.
Table A.1: Organisation of entries in log of studies
See Note
Name of intervention
Main reference(s)
Date when it was implemented
Age-range of children involved, in school years (Y2, etc)
Type of children involved 1)
Number of pupils in experimental group
Number of pupils in control group, where there was one
Number of pupils in alternative intervention group, where there was one
Nature of alternative intervention
For each group, number of schools, where known
Whether groups were equivalent 2)
Length of intervention in weeks
Reading and/or spelling test(s) or writing assessment used 3, 4)
For each group (where known), pre- and post-test average scores,
and units in which these are stated 5)
For each group (where known), difference between pre- and
post-test average scores (‘gain’) in relevant units 6)
For each group, where scores are reading ages (r.a’s), ratio gain (RG),
stated to one decimal place 7)
Effect size (where this was known or could be calculated),
stated to two decimal places 8)
Statistical significance of differences between pre- and post-test scores,
and between experimental, control and alternative intervention groups,
where known 9)
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