Changes in spinal excitability during dual task performance

ABSTRACT The authors investigated how the nervous system responds to dual task performance. Because dual tasking is associated with greater postural challenges, it was hypothesized that spinal excitability would be reduced when simultaneously performing 2 tasks. For this experiment, participants maintained a lying or standing posture with or without performing a concurrent cognitive task (i.e., reacting to an auditory tone). Spinal excitability was assessed by eliciting the soleus Hoffmann reflex (H-reflex). Results indicated that the H-reflex was 6.4 ± 2.3% smaller (p = .011) when dual compared to single tasking. The reduced H-reflex amplitude, indicating a depressed spinal excitability, when dual tasking is suggested to reflect a neural strategy that individuals adopt to maintain postural stability when cognitive resources are divided between 2 concurrent tasks.     

COHERENTISM AND THE EPISTEMIC JUSTIFICATION OF MORAL BELIEFS: A CASE STUDY IN HOW TO DO PRACTICAL ETHICS WITHOUT APPEAL TO A MORAL THEORY

This paper defends a coherentist approach to moral epistemology. In “The Immorality of Eating Meat” (2000), I offer a coherentist consistency argument to show that our own beliefs rationally commit us to the immorality of eating meat. Elsewhere, I use our own beliefs as premises to argue that we have positive duties to assist the poor (2004) and to argue that biomedical animal experimentation is wrong (2012). The present paper explores whether this consistency‐based coherentist approach of grounding particular moral judgments on beliefs we already hold, with no appeal to moral theory, is a legitimate way of doing practical ethics. I argue (i) that grounding particular moral judgments on our core moral convictions and other core nonmoral beliefs is a legitimate way to justify moral judgments, (ii) that these moral judgments possess as much epistemic justification and have as much claim to objectivity as moral judgments grounded on particular ethical theories, and (iii) that this internalistic coherentist method of grounding moral judgments is more likely to result in behavioral guidance than traditional theory‐based approaches to practical ethics. By way of illustrating the approach, I briefly recapitulate my consistency‐based argument for ethical vegetarianism. I then defend the coherentist approach implicit in the argument against a number of potentially fatal metatheoretical attacks.     

Multilevel Measurement of Dimensions of Collaborative Functioning in a Network of Collaboratives that Promote Child and Family Well-Being

Evaluating collaboration between community partners presents a series of methodological challenges (Roussos and Fawcett in Annu Rev Public Health 21:369-402, 2000; Yin and Kaftarian 1997), one of which is selection of the appropriate level of analysis. When data are collected from multiple members of multiple settings, multilevel analysis techniques should be used. Multilevel confirmatory factor analysis (MCFA) is an analytic approach that incorporates the advantages of latent variable measurement modeling and multilevel modeling for nested data. This study utilizes MCFA on data obtained from an evaluation survey of collaborative functioning provided to members of 157 community collaboratives in Georgia. This study presents a well-fitting measurement model that includes five dimensions of collaborative functioning, and a structural component with individual- and collaborative-level covariates. Findings suggest that members' role and meeting attendance significantly predicted their assessment of collaboration at the individual level, and that tenure of collaborative leaders predicted the overall functioning of the collaborative at the collaborative level. Dimensionality of collaborative functioning and implications of potentially substantial measurement biases associated with selection of respondents are addressed.     

What could be caused must actually be caused

I give two arguments for the claim that all events which occur at the actual world and are such that they could be caused, are also such that they must actually be caused. The first argument is an improvement of a similar argument advanced by Alexander Pruss, which I show to be invalid. It uses Pruss’s Brouwer Analog for counterfactual logic, and, as a consequence, implies inconsistency with Lewis’s semantics for counterfactuals. While (I suggest) this consequence may not be objectionable, the argument founders on the fact that Pruss’s Brouwer Analog has a clear counterexample. I thus turn to a second, “Lewisian” argument, which requires only an affirmation of one element of Lewis’s analysis of causation and one other, fairly weak possibility claim about the nature of wholly contingent events. The final section of the paper explains how both arguments escape objections from supposed indeterminacy in quantum physics.     

Effect of an Automated Training Presentation on Pre-service Behavior Analysts’ Implementation of Trial-based Functional Analysis

The trial-based functional analysis (FA) is a useful alternative to the traditional FA in contexts in which it is challenging to establish environmental control for extended periods of time. Previous researchers have demonstrated that others can be trained to conduct trial-based FAs with high procedural fidelity by providing a didactic presentation, small group instruction, and then a performance evaluation. However, one barrier to replicating this training sequence is that didactic presentations are not standardized and presentations can vary considerably across different groups of trainers or researchers. We designed an automated didactic presentation with video models embedded throughout for trainers and researchers to use when training others to conduct trial-based FAs. The purpose of this study was to evaluate the effect of this presentation on participant fidelity to trial-based FA procedures. Results demonstrate improved fidelity following the presentation. However, the presentation alone was insufficient to establish consistently high levels of fidelity across all conditions for all participants. Thus, additional training components are required when teaching others to conduct trial-based FAs.     

Developing a Brief Sensation Seeking Scale for Children: Establishing Concurrent Validity With Video Game Use and Rule-Breaking Behavior

Despite the importance of life-cycle models to sensation seeking research, past studies have typically focused on adolescents and adults. This is especially problematic for researchers studying the role of media use in the development of risky behaviors (e.g., violent video game consumption and aggressive behavior). To facilitate research with child populations, a brief sensation seeking scale for children (BSSS-C) is developed and validated with a sample of fourth, fifth, and sixth graders (N = 136). The BSSS-C is found to be internally reliable (α = .82) as well as a strong predictor of several risky child behaviors. Higher sensation seeking children were more likely to play video games, including violent subgenres (e.g., shooters), and to enjoy playing video games that contained specific acts of violence (e.g., weapon use). Higher sensation seekers were also more likely to engage in rule-breaking behavior, such as bringing prohibited cell phones to school. The results suggest that sensation seeking may be related to risky behavior at a very young age.     

Lines of advance in psychoanalytic psychotherapy

Freud's 1919 paper is taken as a starting-point to review how far we have advanced towards fulfilment of his prophetic remarks about the need to develop psychoanalytic psychotherapy for the masses. A glance is taken back to some of the circumstances and characters involved in Budapest where the paper was given at the 1918 congress, where there was much talk about the need to do something about the war neuroses. Similar pressures led to the founding of the Tavistock Clinic and Cassel Hospital in the UK, long before the start of the NHS. The pressures of both world wars advanced the applications of psychoanalysis; the next wave of pressures may come from NHS changes and entry into Europe. The history of psychoanalytic psychotherapy in the UK is also considered via looking briefly at the history and development of psychoanalytic publications, of the Tavistock Clinic, of psychoanalytic training, of child psychotherapy and the emergence of adult (non-medical) psychotherapy. There have always been tensions between exponents of the pure gold of analysis and the needs of its wider applications. More flexible arrangements and boundaries are necessary if we are to spread psychoanalysis beyond London and to fulfil Freud's own hopes about the large-scale application of psychoanalytic therapy.     

RITALIN UPDATE: IMPLICATIONS FOR READING TEACHERS

Ritalin (methylphenidate hydrochloride) is a powerful stimulant drug frequently prescribed for children exhibiting hyperactive behavior, poor attention span, and/or distractibility. Reading teachers and other educators have a particular interest in Ritalin since they frequently have students in their classes taking this medication. The researchers in this study were interested in determining how Ritalin is prescribed for children in educational settings, what dosages seem appropriate, and specifically, what effect Ritalin has on reading achievement. Implications for reading teachers are discussed.     

Equality in Law and Philosophy

This article discusses various arguments for and against treating equality as a fundamental norm in law and political philosophy, combining prior arguments to the effect that equality is essentially an empty idea with arguments that treat it as a non‐empty but mistaken value that should be rejected. After concluding that most of the arguments for treating equality as a fundamental value fall victim to one or both of these arguments, it considers more closely arguments made by philosophers such as Ronald Dworkin and Thomas Nagel that base a duty of promoting equality on the fact that governments impose a legal order on persons without their consent. It concludes that these arguments are mistaken: if the legal order imposed by government is justified then imposing it is not wrongful and generates no duty of equal treatment, while if that order is not justified no requirement of equality of treatment would cure the lack of justification. It concludes that equality should not be a value in law or political theory, but in some cases other considerations (such as alleviating poverty and distress, promoting accuracy and substantive justice, avoiding arbitrariness, and other values) may justify particular rules that are sometimes mistakenly thought to be based on equality.     

The effect of message framing on self-management of chronic pain: A new perspective on intervention?

This study examines framed messages as a novel approach to promote self-management of chronic pain. Primary care patients reporting chronic pain (pain rated?≥?4 on 0–10 NRS-I for ≥3 months) were randomly assigned to receive a gain- or loss-framed message promoting self-management of pain. Impact of the framed message on behavioural self-management (including communicating with providers, relaxation, activity pacing, pleasant activities and healthy lifestyle) was assessed. Post-message, individuals in the loss-frame condition reported significantly greater interest in and more knowledge gained from the information presented in the message (p?≤?0.03). Loss-frame participants were significantly more likely to express confidence that they would practice relaxation (p?≤?0.03). Pain readiness to change, pain self-efficacy and message frame independently influenced motivation to engage in relaxation as a self-management strategy. Across all behaviours assessed, there were no observed interactions between message frame and either pain self-efficacy or pain readiness to change (p?>?0.05). Framing may be useful to promote pain self-management; larger trials are needed to fully evaluate its potential and to further assess the applicability of framed communication to impact a broader range of chronic conditions.