Signals From the Mind

It is part of everyday social experience that we receive and send out signals indicative of our emotional or mental state. 'He looked happy' ... 'she sounded rather anxious' ... 'he parted with a confident handshake' ... 'there was the smell of fear about' ..., are all phrases which we use without really thinking about the nature of the signals involved. Most of the code, irrespective of the sense through which the message is received, almost certainly has to be learned.