New technology that could be used by employers, in shops and by insurers has been unveiled at a tech industry event. The software can ‘read’ facial expressions and could be used to assess whether consumers are likely to make a purchase, if a candidate is being honest in a job interview or if someone making an insurance claim is telling the truth. Privacy campaigners have expressed concern about its use. It’s expected that pollsters will use it to assess the candidates in the next US presidential election.