Procedural bias in forensic science examinations of human hair

Several forms of expert forensic science evaluations exist that rely at least in part on the subjective opinion of the examiner. Human hair identification is one such examination. This paper considers possible sources of influence or bias that may be responsible for examiner errors. Data are reported of an experiment that compares the conventional examination procedure (known versus questioned samples) against an alternative procedure (a lineup of samples) designed to limit the influence of factors that contribute to error. The altenative procedure produced fewer incorrect conclusions (3.8%) than the conventional procedure (30.4%).     

Compliance with the law

The effectiveness of law as an instrument of social control depends on the assumptions lawmakers and implementers have about human behavior. The tax laws offer a good example of the difficulties in trying to anticipate what people will do in response to various legal requirements. This paper proposes a new approach to understanding tax compliance drawn from behavioral decision theory. The paper discusses the issue of rationality, explores the strategies people use to make taxpaying decisions, focuses on the distinction between norm-processing and outcome-processing strategies, and presents some implications of this approach for research and for legal policy making.