I am working on various experimental protocols aiming to measure ethically the threshold between the ability and inability to perform a sequence of tasks of increasing difficulty (See Ethical testing of (poor) abilities in animals other than humans? for more context).
After presenting some preliminary results and directions for future work in an Ethology laboratory, I was advised to look into the "go, no go" protocol as a way to demonstrate or measure ethically the inability of a subject to perform a given tasks. Searching the web for the definition of such protocol, I found
- the wikipedia definition of the protocol, which precises in particular that it is "used to measure a participant's capacity for sustained attention and response control";
- an interesting demonstration of a "go, no go" protocol and
- an indirect description of such a protocol (but which helped me more than the Wikipedia definition) in a figure of a neuropsychological article ("Subjects were instructed to respond as quickly as possible to the variously shaped stimuli, but to withhold this pre-potent response on trials where an “X” was superimposed on the stimulus.")
None of these definition seem relevant for proving or measuring the inability of a subject to perform a given task (e.g. reading a text in green on a red background for a subject who is totally green colorblind). Am I misunderstanding the applications of "go/no go" protocols? Can it be used to prove or measure the inability of a subject to perform a given task?