Will the effect last? Math on a tablet helps low-performing second graders… for a while

There is a new Best Evidence in Brief with among others, this study that shows how important it can be to check the lasting effects of what you do.

Published in the Journal of Educational Psychology, Martin Hassler and colleagues carried out a randomized controlled trial of a mathematics intervention on tablets (iPads).
The trial involved 283 low-performing second graders spread across 27 urban schools in Sweden. The children were randomized to four groups:
  • A math intervention called Chasing Planets, consisting of 261 planets on a space map, each with a unique math exercise (addition or subtraction up to 12). Students practiced for 20 minutes a day.
  • The math intervention combined with working memory training, where students spent an additional 10 minutes each day on working memory tasks.
  • A placebo group who practiced mostly reading tasks on the tablet (again for 20 minutes each day), including Chasing Planets-Reading, which had a similar format to the math intervention.
  • A control group who received no intervention, not even on improving their skills on the tablets.
The intervention lasted for around 20 weeks, with children completing nine measures at pre- and post-test, and then after 6 and 12 months.
Both math conditions scored significantly higher (effect size = +0.53-0.67) than the control and placebo groups on the post-test of basic arithmetic, but not on measures of arithmetic transfer or problem solving. There was no additional benefit of the working memory training. The effects faded at the 6-month follow-up (effect size = +0.18-0.28) and even more so after 12 months (effect size = +0.03-0.13)
IQ was a significant moderator of direct and long-term effects, such that children with lower IQ benefited more than higher IQ students. Socioeconomic factors did not moderate outcomes.

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