Detecting Subjective Truth

Truth about Truth Detecting Techniques

During the period from 2001 to 2010 police officials in India were lured by a team of pseudo-scientists, from the Forensic Laboratories in Bangalore and Ahmadabad to make use of narcoanalysis, polygraph test and brain fingerprinting to extract confessions from accused persons. All the three tests, preceded by a pre-test interview and interrogation, were conducted by the one and the same expert ...

A Bayesian truth serum for subjective data.

Subjective judgments, an essential information source for science and policy, are problematic because there are no public criteria for assessing judgmental truthfulness. I present a scoring method for eliciting truthful subjective data in situations where objective truth is unknowable. The method assigns high scores not to the most common answers but to the answers that are more common than col...

Degrees of Truth , Degrees of Belief and Subjective Probabilities ∗

A number of authors have noted that if we have degrees of truth, then we should have corresponding degrees of belief—but that these degrees of belief do not behave like subjective probabilities. So should we countenance two different kinds of degree of belief? I argue that we cannot coherently do so, and present instead a formal framework in which there is a single notion of degree of belief, w...

Inferring Ground Truth from Subjective Labelling of Venus Images

In remote sensing applications "ground-truth" data is often used as the basis for training pattern recognition algorithms to generate thematic maps or to detect objects of interest. In practical situations, experts may visually examine the images and provide a subjective noisy estimate of the truth. Calibrating the reliability and bias of expert labellers is a non-trivial problem. In this paper...

Qualitative and quantitative scrutiny by regulatory process: is the truth subjective or objective?