An experimenter discovers that the time for people to detect a string of letters on a computer screen is 400 milliseconds, and that the time to push one of two buttons as to whether that string of letters is a legitimate word (e.g., travel) versus a nonword (e.g., terhil) is 575 milliseconds. Which technique would be most useful in figuring out the time for word recognition, independent of letter-string detection?
a. Introspectionsb. Operant conditioningc. Neuropyshologyd. Subtractive method