Roughness perception during the rubber hand illusion

Watching a rubber hand being stroked by a paintbrush while feeling identical stroking of one’s own occluded hand can create a compelling illusion that the seen hand becomes part of one’s own body. It has been suggested that this so-called rubber hand illusion (RHI) does not simply reflect a bottom–up multisensory integration process but that the illusion is also modulated by top–down, cognitive factors. Here we investigated for the first time whether the conceptual interpretation of the sensory quality of the visuotactile stimulation in terms of roughness can influence the occurrence of the illusion and vice versa, whether the presence of the RHI can modulate the perceived sensory quality of a given tactile stimulus (i.e., in terms of roughness). We used a classical RHI paradigm in which participants watched a rubber hand being stroked by either a piece of soft or rough fabric while they received synchronous or asynchronous tactile stimulation that was either congruent or incongruent with respect to the sensory quality of the material touching the rubber hand. (In)congruencies between the visual and tactile stimulation did neither affect the RHI on an implicit level nor on an explicit level, and the experience of the RHI in turn did not cause any modulations of the felt sensory quality of touch on participant’s own hand. These findings first suggest that the RHI seems to be resistant to top–down knowledge in terms of a conceptual interpretation of tactile sensations. Second, they argue against the hypothesis that participants own hand tends to disappear during the illusion and that the rubber hand actively replaces it.     

Peritraumatic fear, helplessness and horror and peritraumatic dissociation: do physical and cognitive symptoms of panic mediate the relationship between the two?

The goal of this study was to examine whether panic mediates the relationship between fear, helplessness, and horror (PTSD criterion A2) and dissociation at the time of trauma. The study sample included 709 police officers and 317 peer-nominated civilians who had been exposed to a variety of critical incidents. Participants filled out measures of critical incident exposure, PTSD criterion A2, panic, and dissociation. Results indicate that together, physical and cognitive symptoms of panic completely mediate the relationship between criterion A2 and dissociation in civilians, and partially mediate that relationship in police. These results provide support for the idea that panic mediates the relationship between fear, helplessness, and horror (criterion A2) and dissociation at the time of trauma. The results also raise the possibility, however, that the mediational role of panic may be further moderated by additional variables.     

Differential rates of skill acquisition and outcomes of early intensive behavioral intervention for autism

Intensive behavioral intervention for very young children with autism has received increased attention in recent years. Researchers have documented unprecedented success in educating some young children with autism, although not every child makes dramatic developmental gains. It might be useful to identify early in treatment those children who will benefit most from the current methodology and who might require slight variations in instructional format or curricular focus. The present study suggests that initial learning rates are moderately correlated with treatment outcomes after two years. Among 20 children receiving early, intensive behavioral intervention, initial acquisition of skills was correlated with later learning rates, severity of autism symptomatology and adaptive behavior profiles two years into treatment. Implications are discussed, especially in light of the universal need for intensive intervention in this population. Copyright © 1999 John Wiley & Sons, Ltd.     

IV—Knowledge of Meaning

The paper is sympathetic to the idea that speakers have implicit knowledge of the semantics of sub-sentential elements of language, loosely, of words. Implicit knowledge is knowledge which the subject need not be capable of articulating yet which is a genuine propositional attitude and it is to be contrasted with tacit knowledge which refers to an information-bearing state which, however, is not a genuine propositional attitude. ¹ I begin by defending the implicit knowledge conception of speakers' knowledge of the meanings of words from a challenge articulated by Evans and then go on the offensive against positions which attempt to replace the notion of implicit knowledge in semantic theory by that of tacit knowledge.     

Why didn’t you say something? Effects of after-event reviews on voice behaviour and hierarchy beliefs in multi-professional action teams

Team decision-making can go wrong when individuals fear to voice suggestions or concerns to higher status team members. We investigate how after-event reviews (AERs) can be used to promote voice behaviour and hierarchy-attenuating beliefs in multi-professional action teams. We hypothesized that (1) lower status team members will speak up more following an assertiveness-specific AER (ASAER) as compared to a teamwork-generic AER (TGAER) and (2) that an ASAER leads to stronger endorsement of hierarchy-attenuating beliefs than the TGAER. To test these hypotheses, we implemented simulations of medical emergencies with 20 healthcare teams consisting of low (i.e., nurses) and high-status (i.e., physicians) professions. After participating in one of the two AERs, teams managed a simulation in which a higher status confederate engaged in potentially harmful actions. Behavioural coding of the videotaped simulations and assessment of team members’ hierarchy beliefs supported both hypotheses: nurses spoke up more following the ASAER than following the TGAER and both professional groups reported significantly higher levels of hierarchy-attenuating beliefs following the ASAER as compared to the TGAER. We discuss how AERs can affect upward voice and increase awareness for the potential downsides of status hierarchies in multi-professional teams.     

External support for collaborative problem solving in a simulated provider/patient medication scheduling task

Taking medication requires developing plans to accomplish the activity. This planning challenges older adults because of age-related cognitive limits and inadequate collaboration with health providers. The authors investigated whether an external aid (medtable) supports collaborative planning in the context of a simulated patient/provider task in which pairs of older adults worked together to create medication schedules. Experiment 1 compared pairs who used the medtable, blank paper (unstructured aid), or no aid to create schedules varying in complexity of medication constraints (number of medications and medication co-occurrence restrictions) and patient constraints (available times during the day to take medication). Both aids increased problem-solving accuracy and efficiency (time per unit accuracy) compared to the no-aid condition, primarily for more complex schedules. However, benefits were similar for the two aids. In Experiment 2, a redesigned medtable increased problem-solving accuracy and efficiency compared to blank paper. Both aids presumably supported problem solving by providing a jointly visible workspace for developing schedules. The medtable may be more effective because it externalizes constraints (relationships between medication and patient information), so that participants can more easily organize information. (PsycINFO Database Record (c) 2008 APA, all rights reserved).     

E-mentoring for youth with special needs: preliminary results.

Recently, a growing number of electronic mentoring (e-mentoring) Web sites have become available that provide vocational and career support. To date, few researchers have addressed the phenomenon of e-mentoring from a socioemotional perspective for populations with special needs. This paper presents a pilot study designed to test and evaluate an e-mentoring intervention program based on mutual self-disclosure and friendship for youth with special needs. Using qualitative methods, the study characterized the e-mentoring process and its contributions to this population. Results provided support for the socioemotional potential of computer-mediated communication for youth with special needs, although some barriers were found. Practical implications for implementing feasible e-mentoring programs for youth with special needs are discussed.