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

18 SPELLIT
Main reference: Rack and Hatcher (2002a, in press, b, in press)
Date: 1999-2000
Age-range: Y2-4
Type of children: Low attainment (‘reading and spelling in the lower 10% on standardised
tests’)
N of experimental group: 51
N of control group: 58
N of alternative intervention: 41
Nature of alternative intervention group: ‘Home Support Programme consisting of
activities and exercises to be done at home for around 15 minutes a day, for 5 days a week
over a 30 week period’
Equivalence of groups: children were allocated at random, with some minor adjustment to
achieve a balance of age, IQ, etc., in the three groups
Length of intervention in weeks: 30, but 39 on average between pre- and post-test
Reading test: BASWRT
Pre- and post test average r.a’s and standardised scores (s.d’s not stated), gains, and
ratio gains:
Group r.a. r.a. Gain (in RG Standard Standard Gain
pre post months of r.a.) Score pre Score post
Exps. 5.77 6.69 11 1.2 82.41 84.73 2.32
Conts. 5.85 6.37 6 0.7 82.66 81.26 -1.4
AI 5.80 6.58 9 1.0 84.15 85.22 1.07
Effect sizes: were not stated and could not be calculated
Statistical significance: not stated
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