Plate weighing device 'can curb childhood obesity'

The scale can't and that is a "weighing device."

"A talking, computerised weighing device that tracks how quickly food is gobbled off the plate could be a solution to childhood obesity, researchers say."

Even if it did work for a while, it probably has an "off" switch.

You can bet that it will get more use than the "on " switch.

Sort of like the "close door" button on an elevator gets used more than the "open door" button.