A medical apparatus (30, 32) made up of at least two devices adapted to measure eating rate utilized to teach persons to eat according to a predetermined graphic eating curve (10, 24) displayed on a screen, comprising: a device with a screen storing said predetermined graphic eating curve (10, 24) in a memory, said first device having at least one of remote near field radiation and wire capabilities for communication with a related second device; said related second device scale adapted to communicate with said first device, having at least one of remote near field radiation and wire communication capabilities adapted to said first device; said scale being adapted to receive food to be weighed for a predetermined length of time, the system further comprising means adapted to transmit the food weight to said first device through said communication capabilities when food is removed from said scale by a person eating the food, and through means of software residing in said first device storing the amount of food removed during a session in said memory, displaying the weight of food removed as a measurement point on said screen when it is removed from said scale to make up a real time graphic eating curve to be compared with said predetermined eating curve (10, 24); characterised in that the medical apparatus is further comprising: means in said memory automatically calculating equations for predetermined eating curves (10, 24) based on data obtained from a cumulative food intake in a control meal through an introductory curve followed by training curves, whereby the cumulative food intake is fitted to a quadratic equation y=ax 2 +bx+c, where the parameter y represents food intake, a represents a change in the slope of the curve over time x, b represents a constant slope of the curve over time, the initial rate of eating, and c represents food intake at the start of a meal, whereby the introductory curve has the same properties as the cumulative food intake obtained in control a meal. a device with a screen storing said predetermined graphic eating curve (10, 24) in a memory, said first device having at least one of remote near field radiation and wire capabilities for communication with a related second device; said related second device scale adapted to communicate with said first device, having at least one of remote near field radiation and wire communication capabilities adapted to said first device; said scale being adapted to receive food to be weighed for a predetermined length of time, the system further comprising means adapted to transmit the food weight to said first device through said communication capabilities when food is removed from said scale by a person eating the food, and through means of software residing in said first device storing the amount of food removed during a session in said memory, displaying the weight of food removed as a measurement point on said screen when it is removed from said scale to make up a real time graphic eating curve to be compared with said predetermined eating curve (10, 24); characterised in that the medical apparatus is further comprising: means in said memory automatically calculating equations for predetermined eating curves (10, 24) based on data obtained from a cumulative food intake in a control meal through an introductory curve followed by training curves, whereby the cumulative food intake is fitted to a quadratic equation y=ax 2 +bx+c, where the parameter y represents food intake, a represents a change in the slope of the curve over time x, b represents a constant slope of the curve over time, the initial rate of eating, and c represents food intake at the start of a meal, whereby the introductory curve has the same properties as the cumulative food intake obtained in control a meal.