Cascading Bias of Initial Exposure to Information at the Crime Scene to the Subsequent Evaluation of Skeletal Remains,

Thirty‐eight participants took part in a study that investigated the potential cascading effects of initial exposure to extraneous context upon subsequent decision‐making. Participants investigated a mock crime scene, which included the excavation of clandestine burials that had a male skeletal cast dressed either in female or gender neutral clothing. This was followed by a forensic anthropological assessment of the skeletal remains, with a control group assessing the same male skeletal cast without any clothing context. The results indicated that the sex assessment was highly dependent upon the context in which participants were exposed to prior to the analysis. This was especially noticeable in the female clothing context where only one participant determined the male skeletal cast to be male. The results demonstrate the importance of understanding the role of context in forensic anthropology at an early stage of an investigation and its potential cascading effect on subsequent assessments.     

Subjectivity and bias in forensic DNA mixture interpretation

The objectivity of forensic science decision making has received increased attention and scrutiny. However, there are only a few published studies experimentally addressing the potential for contextual bias. Because of the esteem of DNA evidence, it is important to study and assess the impact of subjectivity and bias on DNA mixture interpretation. The study reported here presents empirical data suggesting that DNA mixture interpretation is subjective. When 17 North American expert DNA examiners were asked for their interpretation of data from an adjudicated criminal case in that jurisdiction, they produced inconsistent interpretations. Furthermore, the majority of 'context free' experts disagreed with the laboratory's pre-trial conclusions, suggesting that the extraneous context of the criminal case may have influenced the interpretation of the DNA evidence, thereby showing a biasing effect of contextual information in DNA mixture interpretation.     

Contextual information renders experts vulnerable to making erroneous identifications

We investigated whether experts can objectively focus on feature information in fingerprints without being misled by extraneous information, such as context. We took fingerprints that have previously been examined and assessed by latent print experts to make positive identification of suspects. Then we presented these same fingerprints again, to the same experts, but gave a context that suggested that they were a no-match, and hence the suspects could not be identified. Within this new context, most of the fingerprint experts made different judgements, thus contradicting their own previous identification decisions. Cognitive aspects involved in biometric identification can explain why experts are vulnerable to make erroneous identifications.     

Prolegomena to policy sciences

Establishment of policy sciences as a new supradiscipline involves a scientific revolution, requiring fargoing innovations in basic paradigms. Particularly essential are: (1) Integration between various disciplines, and especially of social sciences with analytical decision approaches; (2) bridging of the pure vs. applied dichotomy; (3) acceptance of tacit knowledge as a scientific resource; (4) changes in interface between science and values; (5) broad time perspectives; (6) focus on metapolicies; (7) commitment to policymaking improvement; and (8) concern with extrarational and irrational processes, such as creativity.Unique subjects of policy sciences, opened up by these paradigms, include, among others: (a) Policy analysis, which involves critical changes in systems analysis so as to permit application to complex policy issues; (b) policy strategies, involving determination of postures and main guidelines for specific policies, such as on degrees of incrementalism vs. innovation and on attitudes to risks; and (c) policymaking system redesign, including evaluation and improvement of the policymaking system, e.g., through changes in one-person-centered high-level decisionmaking, development of politicians, and institutionalization of social experimentation.Development of policy sciences requires many innovations in research, teaching, and professional activities. It constitutes a main effort to reconstruct the role of intellectualism and rationality in human affairs and, therefore, justifies intense efforts.Parts of this article are based on papers delivered at the 136th Annual Meeting of the American Association for the Advancement of Science (Boston, 26–31 December 1969) and at the 65th Annual Meeting of the American Political Science Association (New York, 2–6 September 1969).     

Cognitive and contextual influences in determination of latent fingerprint suitability for identification judgments

We examined forensic fingerprint examiners' suitability determinations of latent fingerprints comparing situations in which the latent is assessed solo (in isolation) versus situations in which it is presented alongside a comparison (matching or non-matching) exemplar print. The presence of a non-matching comparison exemplar led examiners to be more inclined to draw the conclusion that the latent was suitable for comparison compared to when the latent was presented solo. This effect persisted even when the latent presented was highly unsuitable for comparison. The presence of a matching comparison exemplar led examiners to be less likely to decide that the latent was suitable and more likely to decide the latent was questionable compared to solo analysis. This effect persisted even when the latent presented was highly suitable, suggesting a strong main effect. Knowledge of another examiner's previous determination that the latent was unsuitable was found to increase the likelihood that the examiner would conclude that the latent was unsuitable. However, knowledge of a previous “suitable” determination by another examiner did not increase the likelihood of a “suitable” conclusion by examiners. The finding that effects were weaker, although not entirely removed, in those with IAI certification suggests that training may be an appropriate route for reducing the effect of contextual influence and bias in suitability determinations. It was also shown that latent prints that were previously classed as "unsuitable" in a non-biasing context, continued to be judged to be "unsuitable" in a strongly biasing context (a major case in which a previous examiner was purported to have made an Individualization).