Adaptive density estimation: A curse of support?

This paper deals with the classical problem of density estimation on the real line. Most of the existing papers devoted to minimax properties assume that the support of the underlying density is bounded and known. But this assumption may be very difficult to handle in practice. In this work, we show that, exactly as a curse of dimensionality exists when the data lie in R^d, there exists a curse of support as well when the support of the density is infinite. As for the dimensionality problem where the rates of convergence deteriorate when the dimension grows, the minimax rates of convergence may deteriorate as well when the support becomes infinite. This problem is not purely theoretical since the simulations show that the support-dependent methods are really affected in practice by the size of the density support, or by the weight of the density tail. We propose a method based on a biorthogonal wavelet thresholding rule that is adaptive with respect to the nature of the support and the regularity of the signal, but that is also robust in practice to this curse of support. The threshold, that is proposed here, is very accurately calibrated so that the gap between optimal theoretical and practical tuning parameters is almost filled.     

Memory for One‐Time Experiences in the Second Year of Life: Implications for the Status of Episodic Memory

Memory based on a one‐time experience is an important element of its definition as “episodic.” Infants' memories for one‐time experiences over long delays are largely unexplored. Using elicited imitation, we tested 20‐ and 16‐month‐olds' (Experiment 1) and 13‐month‐olds' (Experiment 2) memories as a function of number of experiences and delay. Over 1 month, 20‐ and 16‐month‐olds remembered individual actions of one‐time events; 20‐month‐olds also remembered temporal order; with verbal reminders, 16‐month‐olds did as well. Over 3 months, recall depended on multiple experiences. Thirteen‐month‐olds' required multiple experiences, even over 1 month. The findings speak to the gradual emergence of an important element of episodic memory, namely the ability to preserve memories of one‐time experiences over long periods of time.     

Who Holds the Stakes? A Case Study of Stakeholder Identification at Two Nuclear Weapons Production Sites

Traditional risk assessments, including those involving the United States Department of Energy (USDOE), are often criticized for producing useless or noncredible management responses because they did not meaningfully involve the public. The first step to involve the public is to identify appropriate active participants (stakeholders). This study was done to understand the processes used to identify stakeholders to serve on advisory boards established at the two largest remediation sites in the United States: the Hanford Nuclear Reservation in Washington state and the Savannah River Site in South Carolina. The Hanford stakeholder identification process produced an interest-based board whereas the Savannah River Site strategy produced population-based representation. The basic goals of the stakeholder advisory groups were similar. However, different processes were used to identify the participants for the groups in part because of distinctly different social and cultural conditions in the areas affected by the operations of the two facilities, and in part because of the different level of trust of the USDOE and their contractors at Hanford compared with Savannah River. The discussion analyzes their different needs and potential for successful citizen participation.     

Technology transfer concerns of college graduates with disabilities: Profiles in transition from higher education to competitive careers

The article describes the technology transfer concerns reported by a small sample (N=14) of recent college graduates with disabilities. In structured, in-depth interviews, researchers asked respondents to reflect on the extent to which they had utilized technology resources during their college years in preparation for the world of work. Results suggest that colleges and universities need to play a more active role in introducing students with disabilities to both generalized and assistive technology services.     

Laughing Your Way to Peace of Mind: How a Little Humor Helps Caregivers Survive

As the numbers of caregivers continue to increase, more attention is being focused on the unique stresses these individuals experience. Caring for a loved one tests the limits of even the most resilient, regardless of professional status or experience. Laughter is a universal elixir which allows people to cope more sanely with stress and caregiving responsibilities. Research on the emotional and physical benefits of laughter supports the use of humor by professionals and family members who occupy caregiving roles. This article addresses this research and examines common caregiver emotions while providing concrete guidelines for developing humor. Case examples demonstrate how laughter and wit are utilized by those caring for a loved one.     

The Role of Effort in Shifting Preference for Feedback Stimuli

ABSTRACT

Researchers have examined preference for the format of delivery of feedback, however little research has examined strategies to increase feedback and praise desirability. The current study aimed to evaluate whether preference shifted for stimuli that signaled work and for manager-praise stimuli that were delivered after work. Moreover, we sought to understand if these preference shifts were greater when the work was higher-effort compared to lower-effort work tasks (a phenomenon described in the basic literature as within-trial contrast). The study took place in a simulated work environment. Sixteen university students clicked on a shape that produced the work task, completed a mock medical data-entry task, and received manager-praise on an FR1 and FR20 schedule. At the start of the study and following each contingency exposure trials, they completed a preference assessment for both the shapes and the manager-feedback stimuli. The primary dependent variable was the percentage of preference change for two categories of stimuli – shapes presented at the beginning of trials that signaled which condition participants were in and manager-praise stimuli presented at the end of trials. Preference for the shape stimuli for both high- and low-effort stimuli decreased indicating that stimuli that signal work may become less preferred. Preference for the manager-praise stimuli for both high- and low-effort stimuli increased suggesting that stimuli that follow work may become more preferred. Overall, these data suggest that the conditions under which managers deliver feedback and praise may influence preference for those stimuli.     

Halfway There? Policy,Politics and Outcomes in Community Care

The community care reforms which followed the 1989 White Paper "Caring for People"were apparently focused on addressing the needs of people requiring long-term care, and on achieving improved outcomes and better quality of life.
The agenda set out by the White Paper was for community care in the next decade and beyond. Half way through this decade, we question the extent to which the objectives of promoting choice and independence for users and carers have been achieved. The paper draws particularly on a programme of monitoring conducted jointly by the Nuffield Institute for Health and the King's Fund, based on national and local focus groups meeting over a two-year period. It proposes a framework for evaluation which consists of four components: the definition of desired outcomes; specification of service systems necessary to deliver such outcomes; promotion of access to services; and the development of supporting operational policies and resource allocation mechanisms.
This framework offers a substantial step beyond much of the monitoring of the community care reforms which has taken place to date. This has assessed progress largely in terms of the establishment of new systems and processes. We conclude that such changes were essential building blocks for delivering better-quality community care services, and in the short term it may have been legitimate to view their establishment as proxies for progress towards delivering user-centred services. However, monitoring and evaluation should now be increasingly oriented towards ensuring that these changes are in fact producing the desired service outputs and urn outcomes. We propose that our framework offers one such way forward.