Cerny added that "first-person shooters are very important to us", and so he went to the key teams that make FPS games to ask for their feedback."We went to key teams who make the best of the best and we got their specific feedback on trigger springiness, concavity or convexity of joysticks and deadzones, and tuned the controller through a succession of prototypes to what it is today."The result is we showed at E3 and I did not hear – and it’s a tough audience – I did not hear any negative feedback about the controller."
Lead system architect Mark Cerny has revealed that, during the DualShock 4's development, Sony trialled gamepads capable of measuring players' galvanic skin response. It's a measure of how conductive your skin is at any given time, which varies based on how much you're sweating. When you're stressed, you sweat more, and that's why galvanic skin response is often used in lie-detecting polygraph tests."We had a long research project where we looked at pretty much any idea we could think of," says Cerny, in an exclusive conversation with Stuff. "Would it help to measure the galvanic response of the skin? We tried out a tremendous number of things - and then we went to the game teams to ask them what they thought they could use from the controller."
"Historically we have heard many times that our controllers have not been ideal for first-person shooters," he admits, "so we wanted to make sure we had something that would be much better for that genre. We tested the throw of the triggers, the position of the triggers, how much pressure it takes. We looked at the joysticks, the dead spot, we looked at convexity and concavity." The end result, he says, "feels extraordinarily natural."