Ethical considerations for neuropsychologists as functional magnetic imagers

This discussion highlights ethical and practical issues potential neuropsychologist-imagers should consider in conducting functional magnetic resonance imaging (fMRI). While fMRI is not currently approved for clinical use, research is ongoing which has implications for clinical practice, from refining brain-behavior relationships, to assisting with diagnosis and treatment decisions. To protect the welfare of cognitively impaired populations requires special care with respect to MR risks and informed consent. Competent functional imaging requires an understanding of the strengths, limitations, and appropriate domain of applications of the measure.     

Capital juror questionnaires in death-penalty cases: A study of attitudes,denials, and deceptions

The Sixth Amendment right to an “impartial jury” should guarantee fundamental fairness that in capital cases may literally be a matter of life and death. For ecological validity, the current study focuses on capital jury questionnaires (CJQs) employed in actual death-penalty cases. Study I examined 248 undergraduates and their responses to death-penalty relevant questions. As an MTurk investigation, Study II consisted of 259 community members potentially eligible for capital trial jury trials. Misrepresentations were operationalized as either denials (concealing their true views) or outright deceptions (dissembling the opposite viewpoint). Both studies found that CJQ items were very susceptible to both types of misrepresentation, irrespective of support-life or support-death views. Nearly 30% of undergraduates openly acknowledged that they would misrepresent close to half their CJQ responses. Overall, community members were much more willing to engage in denials and outright deceptions. The discussion focuses on how CJQs could be improved to promote candor about death-penalty views.     

The MRCI with juvenile detainees: optimizing performance or emphasizing ecological validity?

The Miranda Rights Comprehension Instruments (MRCI) are intended to be administered to legally involved youths in a setting free from distractions and stressors with the explicit goal of assessing the examinee's best understanding. However, marked disparities have been observed between juveniles' MRCI performance and their unassisted recall of a representative Miranda warning. We hypothesized that youths' very strong MRCI performance might be partially due to prompts and clarifications used whenever incomplete or ambiguous answers are provided. In this archival study, we systematically re‐scored three MRCI instruments from 231 legally involved youths to evaluate their original responses (i.e., non‐queried scoring). This approach is viewed as more ecologically valid because actual Miranda warnings are typically provided in a routine manner without assistance following each Miranda component. For the large majority of legally involved juveniles, only small differences were noted between standard and non‐queried scoring. However, some dramatic decrements were observed, especially on the Comprehension of Miranda Rights‐II (CMR‐II). More specifically, 15.7% of CMR‐II percentiles dropped precipitously by 60% or more, when using the non‐queried scores. The results are discussed within the context of optimized performances versus ecological validity as applied to Miranda evaluations.     

Analysing the perceptions of pedestrians and drivers to shared space

Shared space is an approach to improving streets and places where both pedestrians and vehicles are present, with layouts related more to the pedestrian scale and with features encouraging drivers to assume priority having been reduced or removed. It creates a more pedestrian-friendly environment than conventional street layouts, which are based on greater segregation between pedestrians and vehicles, while at the same time introducing uncertainty, which makes drivers engage more fully with their surroundings, leading to lower vehicle speeds and improved safety. This paper investigates the importance of certain person-, context- and design-specific factors affecting the perceptions of pedestrians and drivers to shared space. Using two web-based stated-preference surveys, two sets of responses are collected from pedestrians and drivers, who are presented with different combinations of binary factors forming scenarios. Regression analysis is carried out with logit models for each survey. The results suggest that pedestrians feel most comfortable in shared space under conditions which ensure their presence is clear to other road users – these conditions include low vehicular traffic, high pedestrian traffic, good lighting and pedestrian-only facilities. Conversely, the presence of many pedestrians and, in particular, children and elderly, makes drivers feel uneasy and, therefore, enhances their alertness.     

The Effects of Statistical Format and Population Specificity on Adolescent Perceptions of Cell Phone Use While Driving

Research on risk communication has established that people are influenced by numerical values as well as geographical reference points, or populations, in statistical messages. The ratio bias theory predicts that messages featuring higher casualty numbers will be more influential than similar messages featuring smaller values. However, research on the effects of population specificity predicts that risk messages containing specific populations with naturally lower casualty values will be more effective than similar messages containing larger populations and proportionally greater numbers. This study investigated the contradiction between ratio bias and the effects of population specificity. Students in a drivers’ education class (N?=?112) were randomly assigned to read one of four sets of statistical messages about cell phone use while driving that featured either a general (for example, United States) or specific population (for example, Nassau County), and was expressed using one of two statistical formats, frequencies (for example, “9,000 car accidents…”) or probabilities (for example, “25 % of car accidents…”). Participants then rated their intentions to and perceived risk of using cell phones while driving. Participants who viewed messages featuring general populations along with their naturally larger statistics reported lower intentions to use cell phones while driving than those who were exposed to messages with smaller numbers, but more specific populations. Results suggest that emphasizing larger-valued numbers may be a more effective means of risk communication than depicting specific conditions. These findings have implications for the enhancement of driver safety education to discourage the use of cell phones while driving by teenage drivers.     

Complicated Grief in Canada: Exploring the Client and Professional Landscape

Complicated grief (CG) is one of the central themes in bereavement research and advanced clinical practice today. Using a mixed-methods approach, we wanted to learn (a) what tools Canadian practitioners used to identify or diagnose CG and (b) what interventions or strategies they used to address CG. Sixty-three professionals responded to our survey. There were no straightforward answers to these questions: the state-of-the art of CG in Canada is, in fact, complicated. Practitioners used a wide assortment of tools and strategies with no consensus on any one approach or tool. Building a Canadian CG community of practice was recommended.     

Megachiropteran bats (Pteropus) utilize human referential stimuli to locate hidden food

Spontaneous point-following behavior has been considered an indicator of advanced social cognition unique to humans. Recently, it has been suggested that a close evolutionary relationship with humans could result in similar social skills in domesticated species. An alternative view is that the mechanism is not genetic domestication alone but instead a combination of phylogenetic and ontogenetic variables. Here we test the necessity of phylogenetic domestication by investigating the point-following behavior of a captive population of nondomesticated megachiropteran bats (Pteropus pumilus, Pteropus rodricensis, Pteropus conspicillatus, Pteropus vampyrus). Three of five subjects were highly successful in following an unfamiliar human's point to a target location, providing the first empirical evidence of cross-species social referencing in bats. The three successful bats were all born in captivity and socialized to humans early in life, whereas unsuccessful bats were wild-born individuals. This study provides evidence that referential point following is not restricted to domesticated animals and indicates that early experience may be important. Megachiropteran bats may prove to be a useful model for studying social behaviors.