McLaren sporting director Sam Michael has refused to admit that Jenson Button is a more "sensitive" driver than team-mate Lewis Hamilton.
Button's reported high-pitched sensitivity to car changes has been suggested as an explanation for his slump in form since winning the Australian GP.
But Michael insists the 32-year-old's driving style is almost identical to Hamilton's and dismissed talk that the 2009 World Champion can only operate well in a narrow 'performance window'.
Michael said: "He doesn't require a more precise set-up than Lewis. Most of the time they drive very similar set-up cars.
"There's always a few little tweaks that the drivers make because they might have a slight difference in style, but he is in no way more sensitive to the car than what Lewis is.
"With Jenson in Canada, if you go back to the start of the weekend we had quite a few problems with his gearbox on Friday and he lost a lot of track time because of that.
"From that point on, we tried a few different things with his car set-up to try to explore different areas, and in hindsight we probably shouldn't have done that.
"The wear profile on his tyres was extremely different to what Lewis had and there are certain reasons for that which we believe we've understood and can easily put right for Valencia."
Jenson scored only two points in his last four races and was lapped by his team-mate in Montreal.