Quantum Theory and the Social Sciences

My husband tells me that in quantum mechanics that whenever a measurement is taken, the measurement affects the object measured. I wonder how this affects the "outcome" of social science measurements. How would social scientists be able to "tell" if their measurements are true, or if, indeed, as in quantum theory, the stats are skewed??

Surely, when one observes, they cannot have "pure motives", as in the Golden Rule.