Using self-prophecy to combat vote overreporting on public opinion surveys

Survey researchers have long struggled with respondents who, due to the pressure to adhere to socially desirable norms, erroneously claim to have voted in a previous election. In this paper, we develop a new approach to reducing the overreporting of voting in surveys by leveraging psychological theories that show people have a tendency to follow through on an action once they have predicted their behavior (e.g. Sherman, 1980). Using a survey experiment through the 2014 Cooperative Congressional Election Study, we find that an overwhelming majority of respondents will agree to take an honesty pledge regarding their future vote report. Having pledged their honesty, they then overreport their vote at far lower rates than other survey participants. The observed effects are additive, since previously developed methods of reducing overreporting were present across all conditions. These findings have important implications for studies endeavoring to understand voting behavior and social desirability pressures.     

Y chromosome J2 subtyping in an Italian sample: Population and forensic implications

In the recent years the Y chromosome genealogy has been refined by a number of newly discovered SNPs. The non-random distribution of the Y chromosome lineages worldwide makes fundamental the dissection and characterisation of haplogroups associated with specific geographic areas. In Southern Europe the haplogroup J2, as defined by the M172 marker, can reach frequencies up to 35%, making the dissection of such lineage critical for population studies. Here we present a study on J2 chromosomes from the Italian peninsula. Populations and forensic implications are discussed. A total of 900 individuals were previously genotyped for a number of SNPs, including M172. More than 200 of these have been now genotyped for 7 SNPs within the J2 lineage using a multiplex SNaPshot approach. The different distribution of the various lineages in different geographic areas probably reflects different historical demographic events and points to differential Y chromosome haplotype distribution, with implication for forensic application of this genetic marker.     

Book reviews

Stuart M. Kaye. International Fisheries Management. Kluwer Law International, The Hague, Netherlands, 2001. 606 pp. (hard cover). $172.00

Rosalee Love. Reefscape, Joseph Henry Press, Washington D.C., 2001. 264 pp. (hard cover). $24.95

Olav Schram Stokke (ed.), Governing High Seas Fisheries: The Interplay of Global and Regional Regimes, Oxford University Press, New York, 2001. 365 pp. (hard cover). $95.00

Norman J. Vig and Michael E. Kraft (eds.). Environmental Policy: New Directions for the Twenty‐First Century. 4th ed. Congressional Quarterly Press, Washington D.C., 2000. 416 pp. (paperback). $39.95

Joseph Franke and Teresa M. Telecky. Reptiles as Pets: An Examination of the Trade in Live Reptiles in the United States. The Humane Society of the United States, Washington D.C. 2001. 146 pp. (paperback). $10     

Single primer extension (SPEX) amplification to accurately genotype highly damaged DNA templates

High levels of non-authentic sequence data can be generated by traditional PCR-based methodologies when DNA is damaged, template numbers are small and/or the target amplification size too large. We therefore present an alternate methodology based on single primer extension (SPEX) amplification; that places no pre-defined size constraints on amplification and interacts with only one of the DNA strands at the target locus.     

Land,labor, and love: Household arrangements in nineteenth century eastern Finland—cultural heritage or socio-economic structure?

The article examines the relationship between household arrangements, marriage, and the economy in Virolahti in eastern Finland, where household forms superficially resemble the large and complex households found in Russian serf populations to the east. In Virolahti, however, the age at marriage was higher than in the Russian populations, and the choice of partner was made by the young couple, not by the parents. The absence of serfdom and corvée labor linked household size and economic needs more directly with ecology and resources than was the case within a system where the wishes of a landlord had to be taken into account. During the nineteenth century, joint-family households were replaced by stem families as the need for a large work-force diminished with the replacement of slash-and-burn agriculture with set field agriculture. Cultural influences on household forms were less important than economic factors.     

Forensic analysis of homicides on the basis of cases examined in the Forensic Medicine Department,Medical University of Silesia,Katowice, in the years 1991–2002

The authors have reviewed medico-legal opinions relating to 3690 autopsy cases of homicides. Forensic analysis of all these cases showed a gradual increase in the number of homicides, especially those resulting from beating or using fire-arms. A great number of homicides with incised or stab wounds was also observed.     

The Correlation Between Skeletal Weathering and DNA Quality and Quantity*

Abstract: Mitochondrial DNA analysis of skeletal material is invaluable in forensic identification, although results can vary widely among remains. Previous studies have included bones of different ages, burial conditions, and even species. In the research presented, a collection of human remains that lacked major confounders such as burial age, interment style, and gross environmental conditions, while displaying a very broad range of skeletal degradation, were examined for both mitochondrial DNA (mtDNA) quality and quantity. Overall skeletal weathering, individual bone weathering, and bone variety were considered. Neither skeletal nor bone weathering influenced DNA quality or quantity, indicating that factors that degrade bone do not have the same effect on DNA. In contrast, bone variety, regardless of weathering level, was a significant element in DNA amplification success. Taken together, the results indicate that neither skeletal nor individual bone appearance are reliable indicators of subsequent mtDNA typing outcomes, while the type of bone assayed is.     

Application of HRM-PCR (high resolution melting PCR) for identification of forensically important Coleoptera species

Precise estimation time of death is one of key task of forensic entomology. Especially interesting is Coleofauna present at all stages of cadaver decomposition. The morphological identification of Coleoptera species from varying life stages to species level is time-consuming and needs highly qualified entomologists. Among different molecular methods of species identification very promising is high-resolution melting PCR. It allows fast single-tube assignment of analyzed sample to species based on amplicon melting profile. The object of this study were different specimens of Coleoptera collected at pig cadavers in Łomna (central Poland) during 2012 - 2014. Specimes were identified to species by experts of corresponding Coleoptera families. From 120 collected specimens belonging to four families and twelve species HRM-PCR correctly identified specimens belonging to three families and eight species.     

Forensic Informativity of ~3000 bp of Coding Sequence of Domestic Dog mtDNA

The discriminatory power of the noncoding control region (CR) of domestic dog mitochondrial DNA alone is relatively low. The extent to which the discriminatory power could be increased by analyzing additional highly variable coding regions of the mitochondrial genome (mtGenome) was therefore investigated. Genetic variability across the mtGenome was evaluated by phylogenetic analysis, and the three most variable ~1 kb coding regions identified. We then sampled 100 Swedish dogs to represent breeds in accordance with their frequency in the Swedish population. A previously published dataset of 59 dog mtGenomes collected in the United States was also analyzed. Inclusion of the three coding regions increased the exclusion capacity considerably for the Swedish sample, from 0.920 for the CR alone to 0.964 for all four regions. The number of mtDNA types among all 159 dogs increased from 41 to 72, the four most frequent CR haplotypes being resolved into 22 different haplotypes.     

A Grass Molecular Identification System for Forensic Botany: A Critical Evaluation of the Strengths and Limitations*

Abstract: Plant material is frequently encountered in criminal investigations but often overlooked as potential evidence. We designed a DNA‐based molecular identification system for 100 Australian grasses that consisted of a series of polymerase chain reaction assays that enabled the progressive identification of grasses to different taxonomic levels. The identification system was based on DNA sequence variation at four chloroplast and two mitochondrial loci. Seventeen informative indels and 68 single‐nucleotide polymorphisms were utilized as molecular markers for subfamily to species‐level identification. To identify an unknown sample to subfamily level required a minimum of four markers or nine markers for species identification. The accuracy of the system was confirmed by blind tests. We have demonstrated “proof of concept” of a molecular identification system for trace botanical samples. Our evaluation suggests that the adoption of a system that combines this approach with DNA sequencing could assist the morphological identification of grasses found as forensic evidence.