Is robot therapy the future?

She's sitting on a purple armchair, nodding slowly as she talks. "When was the last time you felt really happy?" Her voice is low and measured, with the gently broken glottal quality that one might expect of a computer simulation, her ethnicity undefined, her cardigan beige. Ellie, an artificial intelligence therapist created with funding from the US government agency responsible for the development of military technologies, is capable of reading 60 non-verbal cues a second. She wears a watch and a look of blank empathy.