Nonconcurrent Multiple Baseline Designs and the Evaluation of Educational Systems

Important findings are often a balance between the rigor of the experimental design and innovativeness of the experimental question. One broad topic area that has received a great deal of discussion, but little empirical study, is the evaluation of educational systems. Experimental designs that permit the analysis of practices used by state education agencies, local education agencies, and schools have the potential for yielding socially significant findings that could improve education. In this article we discuss the use of nonconcurrent multiple baseline designs as an option for studying the activities and effects of educational programs. Nonconcurrent multiple baseline designs stagger the timing of baseline-to-intervention changes across various entities, but the baselines and intervention phases are not contemporaneous across each of the tiers. Although considered less rigorous than concurrent multiple baseline designs, nonconcurrent designs have a degree of flexibility that may allow for their use in studying complex social contexts, such as educational settings, that might otherwise go unanalyzed.     

The Role of a Facilitator in a Community of Philosophical Inquiry

Abstract: Community of philosophical inquiry (CPI) is a way of practicing philosophy in a group that is characterized by conversation; that creates its discussion agenda from questions posed by the conversants as a response to some stimulus (whether text or some other media); and that includes discussion of specific philosophers or philosophical traditions, if at all, only in order to develop its own ideas about the concepts under discussion. The epistemological conviction of community of philosophical inquiry is that communal dialogue, facilitated by a philosophically educated person, recapitulates and reconstructs the major elements—and even the positions or claims—of the tradition, in one form or another, through the distributed thinking characteristic of dialogical discourse. The pedagogical locus of control of CPI is the group as a whole, which is understood as potentially self‐regulating through a process of ongoing dialectical transformation. The role of the facilitator is to act, among other things, from the Socratic “position of ignorance” as a bridge between concepts and arguments and as a trigger for conceptual system transformation.     

Not every credible interval is credible: Evaluating robustness in the presence of contamination in Bayesian data analysis

As Bayesian methods become more popular among behavioral scientists, they will inevitably be applied in situations that violate the assumptions underpinning typical models used to guide statistical inference. With this in mind, it is important to know something about how robust Bayesian methods are to the violation of those assumptions. In this paper, we focus on the problem of contaminated data (such as data with outliers or conflicts present), with specific application to the problem of estimating a credible interval for the population mean. We evaluate five Bayesian methods for constructing a credible interval, using toy examples to illustrate the qualitative behavior of different approaches in the presence of contaminants, and an extensive simulation study to quantify the robustness of each method. We find that the “default” normal model used in most Bayesian data analyses is not robust, and that approaches based on the Bayesian bootstrap are only robust in limited circumstances. A simple parametric model based on Tukey’s “contaminated normal model” and a model based on the t-distribution were markedly more robust. However, the contaminated normal model had the added benefit of estimating which data points were discounted as outliers and which were not.     

Naïve Realism,Privileged Access,and Epistemic Safety

Working from a naïve‐realist perspective, I examine first‐person knowledge of one's perceptual experience. I outline a naive‐realist theory of how subjects acquire knowledge of the nature of their experiences, and I argue that naive realism is compatible with moderate, substantial forms of first‐person privileged access. A more general moral of my paper is that treating “success” states like seeing as genuine mental states does not break up the dynamics that many philosophers expect from the phenomenon of knowledge of the mind.     

Pivots for pointing: visually-monitored pointing has higher arm elevations than pointing blindfolded

Observers pointing to a target viewed directly may elevate their fingertip close to the line of sight. However, pointing blindfolded, after viewing the target, they may pivot lower, from the shoulder, aligning the arm with the target as if reaching to the target. Indeed, in Experiment 1 participants elevated their arms more in visually monitored than blindfolded pointing. In Experiment 2, pointing to a visible target they elevated a short pointer more than a long one, raising its tip to the line of sight. In Experiment 3, the Experimenter aligned the participant's arm with the target. Participants judged they were pointing below a visually monitored target. In Experiment 4, participants viewing another person pointing, eyes-open or eyes-closed, judged the target was aligned with the pointing arm. In Experiment 5, participants viewed their arm and the target via a mirror and posed their arm so that it was aligned with the target. Arm elevation was higher in pointing directly.     

Theory of Planned Behaviour, Skin Care and Pressure Sores Following Spinal Cord Injury

Objectives: To use the Theory of Planned Behaviour to explore factors associated with performing skin care behaviors and the occurrence of pressure sores in people with spinal cord injury. Design: A within-group cross-sectional design was used to assess 59 people with spinal cord injury living in the community. Of these, 17 participants returned a repeat assessment allowing a longitudinal examination of the relationship between intention and actual behaviour. Methods: A measure was developed in accordance with the Theory of Planned Behaviour guidelines through interviews with people with spinal cord injury. Measures of mood and knowledge of skin care behaviour were also included. Results: The Theory of Planned Behaviour components, mood and knowledge of skin behaviours predicted intention, skin care behaviour and occurrence of pressure sores. Knowledge of skin care was negatively correlated with occurrence of pressure sores (r=−.38, p < .01). Indirect perceived control was a particularly important predictor of pressure relief, accounting for 24% of the variance. Conclusions: Psychosocial factors, including the Theory of Planned Behaviour components, predicted skin care behaviours and the occurrence of pressure sores. These findings provide empirical support for the Theory of Planned Behaviour. The study also carries clinical implications for skin care education for people with SCI and their families.     

Eliminating recency with self‐review: the case of auditors' ‘going concern’ judgments

This paper examines the use of self‐review to debias recency. Recency is found in the ‘going concern’ judgments of staff auditors, but is successfully eliminated by the auditor's use of a simple self‐review technique that would be extremely easy to implement in audit practice. Auditors who self‐review are also less inclined to make audit report choices that are inconsistent with their going concern judgments. These results are important because the judgments of staff auditors often determine the type and extent of documentation in audit workpapers and serve as preliminary inputs for senior auditors' judgments and choices. If staff auditors' judgments are affected by recency, the impact of this bias may be impounded in the ultimate judgments and choices of senior auditors. Since biased judgments can expose auditors to significant costs involving extended audit procedures, legal liability and diminished reputation, simple debiasing techniques that reduce this exposure are valuable. The paper also explores some future research needs and other important issues concerning judgment debiasing in applied professional settings. Copyright © 2002 John Wiley & Sons, Ltd.     

Quality of Social Support Predicts Hopelessness and Depression Post Spinal Cord Injury

Research has documented elevated levels of depression and suicide in the spinal cord injured (SCI) population, with the majority of suicide attempts occurring within 12 months of injury onset. Social support has been linked with depression and suicidal intent, and this study aimed to determine the impact of the quality and quantity of social support on levels of depression and hopelessness, an indirect indicator of suicide risk in the SCI population. Fifty-three individuals with traumatic SCI at Week 6 of their rehabilitation, and 42 at Week 18, with an approximate male to female ratio of 4:1, completed the Beck Depression Inventory (BDI), Beck Hopelessness Scale (BHS), and Social Support Questionnaire. Stepwise multiple regression analyses revealed that high quality of social support was associated with low hopelessness and depression scores, being more pronounced at Week 18 postinjury. The impact of social support on psychological well-being demonstrates the importance of fostering and integrating social support in rehabilitation following spinal cord injury.     

Haptic pictures: fit judgments predict identification,recognition memory,and confidence

DAngiulli et al (1998 Scandinavian Journal of Psychology 39 187-190) found blind and sighted (blindfolded) children identified common objects in raised-outline drawings explored haptically, and corrected themselves without feedback. The self-correction suggests that participants can assess the extent to which the referents they suggest as possible identifications fit the haptic pictures. Indeed, when we asked subjects to identify haptic pictures, and to judge how well the referents they mentioned fitted the pictures, their fit judgments predicted the accuracy of their suggestions. Also, when one group of subjects offered the suggestions and another group assessed the fit of the suggestions to the pictures, the fit judgments predicted the accuracy of the suggestions. Further, good fit predicted successful recognition memory. In addition, both high and low fit judgments were made confidently, so the range of confidence judgments was smaller than the range of fit judgments. Finally, visual judgments of fit by one group predicted the level of success of the suggestions from another (haptic) group. In sum, subjects assess their suggested identifications appropriately, most likely on the basis of object shape criteria, outlined surface edges, and use of a vantage point.     

A practical approach to school psychology

Exclusive use of the clinical model in school psychology is impractical. This is discussed in terms of incidence of adjustment problems, psychologist-student ratios, and undesirable side effects that have resulted from sole use of the clinical model. Reasons for implementing developmental and preventive mental health programs in the schools are discussed, and examples of such programs are presented. Some alternatives to the usual ways of handling the remediation of currently existing adjustment problems are suggested.