The admissibility of polygraph evidence in court

Polygraph evidence is presently inadmissible in Canada and many jurisdictions of the United States. One of the major reasons for its exclusion lies in the belief (held by members of the judiciary) that jurors would accept such evidence without question due to its technical/scientific nature. The question of such blind acceptance was examined in two experiments on the influence of polygraph evidence on people's judgements of guilt. A second question that was also raised was whether a caution on the limitations of the polygraph would be effective in reducing people's weighting of such evidence. Although polygraph evidence was expected to exert some influence over judgements of guilt, it was not expected to be so great as to result in “blind acceptance”. The results of both experiments supported this hypothesis. The inclusion of a caution was also effective in reducing the influence of such evidence. The implications of these findings are discussed in the context of the need to reexamine the admissibility of polygraph evidence in a court of law.     

A dynamic test of the marginality hypothesis

The marginality hypothesis is an attempt to relate the voting margins of members of Congress to their subsequent legislative behavior. A major corollary of the hypothesis is that members of Congress with small victory margins will be more responsive to constituents than those with large victory margins. This has been assumed to mean that electorally secure representatives can afford to be more loyal to their congressional parties, since they have less cause to worry about their chances for reelection. Previous empirical studies have produced mixed results. We ask the question in a different way: Do changes in marginality affect party voting within Congress? If so, major shifts in the electorate potentially can have a fundamental impact on the behavior of Congress itself. We find that this is not true. Electoral margin is simply not related to party loyalty.     

Fear of crime: Who is most vulnerable?

This study investigates the relationship of demographic, psychosocial, and crime-related factors to fear of crime. Data were collected from 1,499 respondents to a national public opinion survey. A discriminant analysis was used to determine those factors which contribute most to respondents' fear of crime. Overall, 12 variables were found to explain 45.7 percent of the variance in fear of crime. Demographic variables such as sex, the size of the place where the respondent lives, age, marital status, and the number of persons living with the respondent were the most important variables discriminating between fearful and nonfearful respondents. Psychosocial and crime-related variables were found to be less important than demographic variables in discriminating between fearful and nonfearful respondents.     

Initials: A question of identity

It has been a generally accepted practice among document examiners to request known handwriting standards which duplicate the questioned material under examination.When initials are questioned it is not always possible to have initials duplicated and known signatures are sometimes substituted.A research study was conducted using a sample of 65 writers to determine if the letters in a group of initials were written in the same manner as the capital letters in a signature. The study showed that 69% of the writers in the sample made one or more changes or additions to their initials which were not present when they wrote their signatures.     

Sudden death by inhalation of cyclopropane

This paper reports the case of a 22-year-old white male who was found dead in a storage room as a result of a fatal ingestion of cyclopropane. Cyclopropane is a sweet-smelling, irritating gas. Autopsy findings revealed congestion and hemorrhagic edema of the lungs, congestion of the trachea, and early autolysis. Cyclopropane was determined by headspace gas chromatography and mass spectrometry. To our knowledge, this is the first reported fatality involving cyclopropane.     

The impact of the right to refuse treatment in a forensic patient population: six-month review

In December of 1987, the Wisconsin supreme court held that all involuntarily committed mental patients in the state had the right to refuse psychotropic medication unless a court held that they were incompetent to make treatment decisions. The authors studied the effects of this decision in a 165-bed forensic hospital over the first six months after implementation of the decision. They found that 29 percent of patients already on psychotropic medication initially refused further treatment as opposed to 75 percent of newly admitted patients. Of refusers, 32 percent eventually resumed taking medication voluntarily; courts overturned the refusals of all the 51 percent who maintained their refusals, after an average delay of over a month. The length of procedural delays actually increased over the six months of the study as the courts learned of the decision. The authors compare their findings with other reported studies of implementation of right to refuse treatment decisions and discuss differences between the right to refuse treatment for civilly and criminally committed patients.