The co-ordination of codes in short-term retention

The present experiments explored ways in which information encoded along different dimensions might be co-ordinated to determine memory performance. First, can an acoustic similarity decrement be offset by additional semantic encoding? Experiment I offers evidence for this compensatory interaction of codes. Second, does trade-off occur such that more information held in one code means less in another code? Third, are codes additive? Experiment II offers no support for the notion of a trade-off between encoding systems. However, when two codes were made available in the second study, recall was increased over the level achieved by either code alone.     

Deciding in the best interest of clients with dementia: the experience of public guardians

We conducted an in-depth interview study of public guardians in three local jurisdictions in the state of Maryland to explore the decision-making process utilized by court-appointed public guardians making medical and EOL care decisions on behalf of their clients with dementia. Overall, public guardians appeared to make their decisions in the context of relevant ethical principles and relevant case law and state statute, and the basis upon which they made informed decisions was dependent on their training and experience. The stated goal of public guardians is to make decisions that they believe are in the best interest of their clients. In the case of a healthcare decision, their goal is to maximize quality of life; and in the case of an EOL care decision, their goal is to minimize pain and suffering. In general, public guardians gathered information in order to identify previous preferences of their now-incapacitated clients, so that they could develop a preference profile to assist both an initial decision on whether an individual ought to have a court-appointed public guardian, and with healthcare and EOL decisions once an appointment was made. When guardians were unable to develop a preference profile for a particular client, they relied on past decisions in similar situations. Healthcare and EOL decisions were most often triggered by a recommendation by the client's healthcare provider. Once a decision-point was identified, the public guardian considered the risks and benefits of the proposed intervention in light of the client's current condition. At times the guardians reviewed informational resources such as textbooks and the Internet. In addition, most guardians sought advice from a medical consultant who is available to all public guardians in Maryland. Some guardians sought the advice of this medical consultant only when faced with more complex decisions. Guardians challenged physicians' recommendations when they believed the physicians were recommending an intervention that was not in the best interest of the client--that is, they advocated against either overtreatment or undertreatment. Ultimately, guardians took particularly difficult issues to the court and obtained a judge's opinion.     

Infants' understanding of the link between visual perception and emotion: "If she can't see me doing it, she won't get angry."

Two experiments investigated 18-month-olds' understanding of the link between visual perception and emotion. Infants watched an adult perform actions on objects. An emoter then expressed neutral affect or anger toward the adult in response to the adult's actions. Subsequently, infants were given 20 s to interact with each object. In Experiment 1, the emoter faced infants with a neutral expression during each 20-s response period but looked at either a magazine or the infant. In Experiment 2, the emoter faced infants with a neutral expression, and her eyes were either open or closed. When the emoter visually monitored infants' actions, the infants regulated their object-directed behavior on the basis of their memory of the emoter's affect. However, if the previously angry emoter read a magazine (Experiment 1) or closed her eyes (Experiment 2), infants were not governed by her prior emotion. Infants behaved as if they expected the emoter to get angry only if she could see them performing the actions. These findings suggest that infants appreciate how people's visual experiences influence their emotions and use this information to regulate their own behavior.     

The Shifting Subtypes of ADHD: Classification Depends on How Symptom Reports are Combined

Research on the correlates of ADHD subtypes has yielded inconsistent findings, perhaps because the procedures used to define subtypes vary across studies. We examined this possibility by investigating whether the ADHD subtype distribution in a community sample was sensitive to different methods for combining informant data. We conducted a study to screen all children in grades 1-5 (N = 7847) in a North Carolina County for ADHD. Teachers completed a DSM-IV behavior rating scale and parents completed a structured telephone interview. We found substantial differences in the distribution of ADHD subtypes depending on whether one or both sources were used to define the subtypes. When parent and teacher data were combined, the procedures used substantially influenced subtype distribution. We conclude the ADHD subtype distribution is sensitive to how symptom information is combined and that standardization of the subtyping process is required to advance our understanding of the correlates of different ADHD subtypes.     

Does the source of an interpersonal odour affect disgust? A disease risk model and its alternatives

Using self‐report, this paper explored whether a malodour's source (self, liked person, stranger) influences hedonic responding. In Study 1, participants were presented with vignettes describing various encounters with malodours. Negative affect increased when body malodours emanated from a stranger rather than oneself (the source effect). Study 2 replicated this finding using a smell diary, in which participants recorded their hedonic responses to real odours. Study 3 determined that this source effect was not due to a social status or a halo effect. Study 4 examined the role of exposure and attachment. Exposure, but not attachment, best accounted for the source effect. Study 5 examined whether perceived disease risk varied by source and whether this could account for the source effect. The findings suggested that there are two mechanisms by which disgust responses to malodours can be modulated to reflect the disease risk of their source: implicitly, by mere exposure, and explicitly, by knowledge of risk. In the discussion, we argue that avoiding contact with disease‐causing agents is adaptive, and that this is implicitly modulated by exposure, so that the cues for disease emanating from people encountered less frequently are treated with more caution. Copyright © 2005 John Wiley & Sons, Ltd.     

Connecting the Dots: Stages of Implementation,Wraparound Fidelity and Youth Outcomes

Several necessary system and organizational support conditions for wraparound have been identified (Walker et al. 2003). Yet, the relationship between these necessary system level conditions and wraparound fidelity has only recently begun to be examined. Similarly, few studies have included a measure of wraparound fidelity when examining the relationship between wraparound implementation and youth outcomes. The statewide implementation of a wraparound demonstration grant offers the opportunity to explore these relationships and to identify factors that predict improvement in functioning for youth receiving wraparound. Findings suggest that significant relationships exist between (1) the stage of development of necessary support conditions for wraparound and wraparound fidelity and (2) wraparound fidelity and improvement in youth outcomes. Specific elements of wraparound (i.e., outcomes based and community based) and baseline needs and strengths (e.g., high levels of anxiety and conduct issues, poor functioning at home and in school, judgment, and risks) were found to predict a reduction in youth needs. Other unexpected relationships between youth outcomes and the cultural competence element of wraparound and being multi-racial were also discovered. These findings reinforce the importance of supporting high fidelity wraparound for youth and their families in a recovery focused behavioral health system.     

The effect of landmark and body-based sensory information on route knowledge

Two experiments investigated the effects of landmarks and body-based information on route knowledge. Participants made four out-and-back journeys along a route, guided only on the first outward trip and with feedback every time an error was made. Experiment 1 used 3-D virtual environments (VEs) with a desktop monitor display, and participants were provided with no supplementary landmarks, only global landmarks, only local landmarks, or both global and local landmarks. Local landmarks significantly reduced the number of errors that participants made, but global landmarks did not. Experiment 2 used a head-mounted display; here, participants who physically walked through the VE (translational and rotational body-based information) made 36% fewer errors than did participants who traveled by physically turning but changing position using a joystick. Overall, the experiments showed that participants were less sure of where to turn than which way, and journey direction interacted with sensory information to affect the number and types of errors participants made.     

Development of a Biomedical Program of Research in the Blackfeet Community: Challenges and Rewards

American Indian (AI) communities have high levels of stress and trauma and are disproportionately affected by numerous preventable diseases. Here, we describe an academic–community partnership based on a collaboration between Blackfeet Community College students and faculty in Psychology and Immunology at Montana State University (MSU). The collaboration, which has spanned over 5 years, was sparked by community interest in the relationship between stress and disease on the Blackfeet reservation. Specifically, community members wanted to understand how the experience of psychological stress and trauma may affect disease risk in their community and identify factors that promote resilience. In doing so, they hoped to identify pathways through which health could be improved for individual community members. Here, we discuss all stages of the collaborative process, including development of measures and methods and themes of research projects, challenges for community members and non‐indigenous collaborators, future directions for research, and the lessons learned. Finally, we note the ways in which this partnership and experience has advanced the science of community engagement in tribal communities, with the hope that our experiences will positively affect future collaborations between indigenous community members and non‐indigenous scientists.     

Confirmatory factor analysis of single- and multiple-factor competing models of the dissociative experiences scale in a nonclinical sample

Previous research on the Dissociative Experiences Scale (DES) has demonstrated that (a) dissociation is quantifiable in both clinical and nonclinical samples and (b) a three-factor structure (amnesia, depersonalization, and absorption) is tenable for clinical samples. The factor structurefor nonclinical samples is less clear, with one- and multiple-factor solutions proposed. To clarify the DESfactor structure in nonclinical samples, confirmatory factor analyses were conducted on (a) one-, two-, three-, and four-factorfirst-order models and (b) two bifactor (hierarchical) models of DES scoresfor two samples of nonclinical university students. Results of delta(chi2) and goodness-of-fit indices support the three-factor (first-order) model as bestfitting of the datafor these samples. The utility of this DES model for screening both dissociative pathology and elevated normal dissociative behavior in clinical and nonclinical populations is discussed.