During development of the PlayStation 4 hardware Sony went through a number of different models for the DualShock 4 controller. One of the prototype DualShock 4 controllers for the PlayStation 4 was able to detect how much you sweat while playing a game, lead architect Mark Cerny told Stuff.tv.
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Sony tested gamepads that could detect players' galvanic skin response according to Cerny. The galvanic skin is the conductivity of players' skin, which can indicate increased stress based on how sweaty their palms are.
Fortunately the final PS4 DualShock 4 controller does not include a touchpad so it won't be measuring players' sweat output.
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Cerny also adds that the DualShock controller's new design was influenced in part by first-person shooting games.
"Historically we have heard many times that our controllers have not been ideal for first-person shooters, 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."
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Cerny says the end result for the controller "feels extraordinarily natural" and adds he hasn't heard anything but good news on the form factor of the controller.
"I haven't heard a negative comment about it yet. For a controller with a very different form factor that was just amazing to see," said Cerny.
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