Signal-to-noise ratio: Difference between revisions

no edit summary
No edit summary
No edit summary
Line 36: Line 36:
This is why physical sciences apparently have a greater success than social sciences — cue Richard Dawkins’ obligatory scoff. Physical sciences generally address behaviour of independent events — rolling balls, [[Coin flip|flipping coins]], waves [[and/or]] particles of light. But rolling balls are not autonomous agents. They act independently. The behaviour of one will not influence that of another. Each [[coin flip]] is, as a condition of probability  theory — independent.<ref>The technical term: “platykurtic”.</ref> Independent events obey Gaussian principles. They may be modelled. That is to say, they may be [[complicated]] but they remain predictable, at least in theory. When physical systems inexplicably go bang — Chernobyl, the Space Shuttle Challenger, the ''Torrey Canyon'' — the root cause will not be a failure of the physical science underlying the engineering, but some supervening cause invalidating the underlying assumptions on which the physical science was based.
This is why physical sciences apparently have a greater success than social sciences — cue Richard Dawkins’ obligatory scoff. Physical sciences generally address behaviour of independent events — rolling balls, [[Coin flip|flipping coins]], waves [[and/or]] particles of light. But rolling balls are not autonomous agents. They act independently. The behaviour of one will not influence that of another. Each [[coin flip]] is, as a condition of probability  theory — independent.<ref>The technical term: “platykurtic”.</ref> Independent events obey Gaussian principles. They may be modelled. That is to say, they may be [[complicated]] but they remain predictable, at least in theory. When physical systems inexplicably go bang — Chernobyl, the Space Shuttle Challenger, the ''Torrey Canyon'' — the root cause will not be a failure of the physical science underlying the engineering, but some supervening cause invalidating the underlying assumptions on which the physical science was based.


[[Social science]]s don’t have that get-out-of-jail-free card: they address precisely that kind of supervening cause: behaviour that is, intrinsically, ''un''predictable. Psychology, sociology, anthropology, economics — these concern themselves with human agents, who ''are'' influenced by each other — which is why we don’t use physical science to predict their behaviour. Social sciences have to deal with the inherently complex, non-Gaussian interactions between human beings.<ref>physical sciences set up [[hermeneutics|hermeneutic]] systems within which their rules will work, and often these systems are dramatically simplified: Newton, for example, assumes a frictionless, stationery, stable, neutral frame of reference: circumstances which, in any observed environment, do not and ''cannot'' not exist. {{author|Nancy Cartwright}} calls these structures “[[nomological machine]]s”. Because of this explicit caveat, we can put any variances between Newton’s prediction and the observed outcome down not to [[falsification]], but to the messy real world “contaminating” the idealised experimental conditions. Hence, the proverbial [[crisp packet blowing across St Mark’s Square]].</ref>
[[Social science]]s don’t have that get-out-of-jail-free card: they address precisely that kind of supervening cause: behaviour that is, intrinsically, ''un''predictable. Psychology, sociology, anthropology, economics — these concern themselves with human agents, who ''are'' influenced by each other — which is why we don’t use physical science to predict their behaviour. Social sciences have to deal with the inherently complex, non-Gaussian interactions between human beings.<ref>physical sciences set up closed logical systems within which their rules will work, and often these systems are dramatically simplified as compared with anything you see in the real world: Newton, for example, assumes a frictionless, stationery, stable, neutral frame of reference: circumstances which, in any observed environment, do not and ''cannot'' not exist. {{author|Nancy Cartwright}} calls these structures “[[nomological machine]]s”. Because of this explicit caveat, we can put any variances between Newton’s prediction and the observed outcome down not to [[falsification]], but to the messy real world “contaminating” the idealised experimental conditions. Hence, the proverbial [[crisp packet blowing across St Mark’s Square]].</ref>