The Ethics of Conducting Community-Engaged Homelessness Research

This paper focuses on some of the ethical issues which may arise when conducting research in the context of homelessness. These issues are considered from the viewpoints of researchers, research coordinators and interviewers, drawing from their extensive real world experience. In addition to negotiating the complex context of homelessness, community-based homelessness researchers need to address a number of ethical issues in research conception, design, implementation and dissemination. Although these issues are commonly considered in community-engaged research, research with people who are homeless may raise exceptional challenges. Such challenges include determining the nature of informed consent; protecting research participants and researchers, and determining appropriate compensation for participation. Understanding the context of homelessness to conduct ethical research will require sharing information and joint decision-making, processes that must include members of communities within which the research participants live. Furthermore, researchers should be sensitive to the changing context of homelessness, and vigilant for new ethical challenges.     

Automated gait analysis in the open-field test for laboratory mice

In this article, an automated and accurate mouse observation method, based on a conventional test for motor function evaluation, is outlined. The proposed measurement technique was integrated in a regular open-field test, where the trajectory and locomotion of a free-moving mouse were measured simultaneously. The system setup consisted of a transparent cage and a camera placed below it with its lens pointing upward, allowing for images to be captured from underneath the cage while the mouse was walking on the transparent cage floor. Thus, additional information was obtained about the position of the limbs of the mice for gait reconstruction. In a first step, the camera was calibrated as soon as it was fixed in place. A linear calibration factor, relating distances in image coordinates to real-world dimensions, was determined. In a second step, the mouse was located and its body contour segmented from the image by subtracting a previously taken “background” image of the empty cage from the camera image. In a third step, the movement of the mouse was analyzed and its speed estimated from its location in the past few images. If the speed was above a 1-sec threshold, the mouse was recognized to be running, and the image was further processed for footprint recognition. In a fourth step, color filtering was applied within the recovered mouse region to measure the position of the mouse’s paws, which were visible in the image as small pink spots. Paws that were detected at the same location in a number of subsequent images were kept as footprints—that is, paws in contact with the cage floor. The footprints were classified by their position relative to the mouse’s outline as corresponding to the front left or right paw or the hind left or right paw. Finally, eight parameters were calculated from the footprint pattern to describe the locomotion of the mouse: right/left overlap, front/hind base, right/left front limb stride, and right/left hind limb stride. As an application, the system was tested using normal mice and mice displaying pentobarbital-induced ataxia. The footprint parameters measured using the proposed system showed differences of 10% to 20% between normal and ataxic mice.     

The role of representation in computation

Reformers urge that representation no longer earns its explanatory keep in cognitive science, and that it is time to discard this troublesome concept. In contrast, we hold that without representation cognitive science is utterly bereft of tools for explaining natural intelligence. In order to defend the latter position, we focus on the explanatory role of representation in computation. We examine how the methods of digital and analog computation are used to model a relatively simple target system, and show that representation plays an in-eliminable explanatory role in both cases. We conclude that, to the extent that biologic systems engage in computation, representation is destined to play an explanatory role in cognitive science.

Age-related effects in prospective memory are modulated by ongoing task complexity and relation to target cue

Two experiments examined the puzzling variation in the age-related patterns for event-based prospective memory tasks. Both experiments involved a famous faces ongoing task with a feature of the famous face as the target for the prospective memory task. In Experiment 1, a substantial age deficit was found on the prospective memory task when the cue was nonfocal (wearing glasses) to the ongoing task, replicating previous research, but this deficit was significantly reduced with a focal cue (first name John). In Experiment 2, the prospective memory cue (wearing glasses) was held constant and the demands of the ongoing task of naming faces were varied. The substantial age differences found with a nonfocal cue were eliminated when the ongoing task was made less challenging. The findings help reconcile the divergent age-related findings reported in the literature.     

Concurrent associations between anxiety sensitivity and perceived health and health disability among young adult daily smokers

The aim of this investigation was to evaluate the incremental validity of anxiety sensitivity (fear of arousal-related physical and psychological sensations) relative to health factors (smoking variables, alcohol use and exercise level), in predicting perceived health and disability among a sample of 225 young adult daily smokers (102 females; M(age) = 23.9 years, SD = 8.8). Consistent with prediction, anxiety sensitivity, relative to smoking-relevant variables, alcohol consumption (a single frequency by quantity composite) and exercise activity, predicted lower perceived general health and impairments in mental health and social functioning; no incremental effects were evident for anxiety sensitivity for predicting impairments in physical functioning, role functioning, or increased healthcare usage. These findings are discussed with respect to better understanding cognitive factors that affect perceptions of health status and functioning among daily smokers.     

Psychological Treatments That Cause Harm

ABSTRACT— The phrase primum non nocere ("first, do no harm") is a well‐accepted credo of the medical and mental health professions. Although emerging data indicate that several psychological treatments may produce harm in significant numbers of individuals, psychologists have until recently paid little attention to the problem of hazardous treatments. I critically evaluate and update earlier conclusions regarding deterioration effects in psychotherapy, outline methodological obstacles standing in the way of identifying potentially harmful therapies (PHTs), provide a provisional list of PHTs, discuss the implications of PHTs for clinical science and practice, and delineate fruitful areas for further research on PHTs. A heightened emphasis on PHTs should narrow the scientist–practitioner gap and safeguard mental health consumers against harm. Moreover, the literature on PHTs may provide insight into underlying mechanisms of change that cut across many domains of psychotherapy. The field of psychology should prioritize its efforts toward identifying PHTs and place greater emphasis on potentially dangerous than on empirically supported therapies.