The researchers suggested this failure to transfer may be down to a lack of parental involvement or the "light touch" nature of the interventions.

BBC: Behaviour classes 'lack impact'

You can get a special roof that will glow with ambient light or become completely transparent at the touch of a button.

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The Light Touch can turn that image into a touch-screen that you can type on or swipe through with the help of a holographic laser projection and infrared sensor at the bottom of the device.

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