The Uncanny Valley of the Shadow of Death

Yuriko Nagano, writing for New Scientist:
It might just look like a large fluffy toy. But Babyloid, Japan's latest therapeutic robot baby, is also designed to help ease depression among older people by keeping them company.
Towards the middle of its round, silicone face are two black dots that act as blinking eyes and a small slit that poses as a mouth and can produce a smile. The cheeks have LED lights embedded and turn red to signify when Babyloid is contented. Blue LED tears are produced when it is unhappy.
How depressed or senile must a person be in order to take comfort from an LED-lit furry robot?