Not what Mahoney says. He is a constructivist and believes that the knower takes an active part in the shaping of reality. This may not include the shaping of atoms. Granted that the atoms may have a structure independent of us that we can discover, as in the neutrino discoveries. But relationships and therapy, these depend upon a reality that Mahoney sees as shaped interactively with the knower.
Reality is the same for Western white males, for non-Western males, for females.
Only our perceptions of it are different. Not Mahoney's position. He believes that each of us brings a different personal experience and personal epistemology to the structuring of reality. All of the above. Not all of the above are positions adopted by Mahoney, at least as jeanne understands what he is saying.