I do not know of an R&R study for attribute data. What I have used in the past, rather, was the model for process capability for attributes. You should be able to define the "process capability" of your gage using this methodology.

Process capability for attributes is defined as:

Capability % = 100*(1-((F+0.7)/N)

Where N is the number of tests and F is the number of failures (gage fails to detect nonconforming product or incorrectly identifies conforming as nonconforming).

Under the assumption the gage always functions correctly, then process capability can be determined by:

Capability % = 100*(0.5)^((1/(N+1))

Hope this helps, or was I completely off base?

Best Regards,

Don