Derived Equivalence Relations of Geometry Skills in Students with Autism: an Application of the PEAK-E Curriculum

The present study evaluated the efficacy of equivalence-based instruction (EBI) as described in the PEAK-E curriculum (Dixon, 2015) for promoting the emergence of derived geometry skills in two children with high-functioning autism. The results suggested that direct training of shape name (A) to shape property (B) (i.e., A-B relations) was effective for both participants. Following A-B training, both participants demonstrated emergent relations that are consistent with symmetry (B-A), as well as emergent shape name (A) to shape picture (C) relations that are consistent with transitivity (A-C). The results expand on existing literature by demonstrating the emergence of an A-C relation when neither A nor B stimuli were ever trained to C stimuli and illustrate the efficacy of EBI for training geometry skills.

     

Understanding disabling barriers: a fruitful partnership between Disability Studies and social practices?

Disabled people are regularly denied their human rights, since policies and laws are hard to translate literally into practice. This article aims to make connections between social practice theories and Disability Studies, in order to understand the problems faced by disabled people, using different methods to look in detail at how practices are shaped and how disabled people get excluded. Disabled people are active agents in making change, both informally on an everyday basis and through formal actions. Thus we also suggest that the insights of disabled people could bring a fresh perspective to social practice theories, by troubling the taken-for-granted in our everyday lives.     

Bubbles, inertia, and experience in experimental asset markets

We find that irrational bubbles continue to form in an experimental assets market even though experience lessens specious market pricing. However, this irrationality may remain hidden from the customary observational perspective. Both price expectations and bubbles appear rational, passing both traditional and cointegration tests. Conventional statistical testing has difficulty distinguishing “irrational” inertia from “rational” market behavior. Yet, inertia provides a much better explanation of observed, experimental market prices than do the “fundamentals” Keywords: Inertia, Rational Bubbles, Experimental Markets, Econometric Testing.     

The Timing of Cohabitation and Engagement: Impact on First and Second Marriages

Using a multistate sample of marriages that took place in the 1990s, this study examined associations between premarital cohabitation history and marital quality in first (N = 437) and second marriages (N = 200) and marital instability in first marriages (intact N = 521, divorced N = 124). For first marriages, cohabiting with the spouse without first being engaged or married was associated with more negative interaction, higher self‐reported divorce proneness, and a greater probability of divorce compared to cohabiting after engagement or marriage (with patterns in the same direction for marital positivity). In contrast, there was a general risk associated with premarital cohabitation for second marriages on self‐reported indices of marital quality, with or without engagement when cohabitation began.     

Real Wage Cyclicality in Italy

This paper analyses the cyclical behaviour of male real wages in Italy, distinguishing between North and Centre‐South, using the European Community Household Panel 1994–2001. We separate job stayers (remaining in the same job), from within‐ and between‐company job movers. Stayers are the large majority. We find stayers in the North to have high procyclicality of real wages, higher in fact than the USA and the UK. Procyclicality is highest in small firms and the private sector, as expected. In contrast, we find that real wages in the Centre‐South exhibit little cyclicality, responding rather to Northern than to local unemployment conditions.     

How Effect Size (Practical Significance) Misleads Clinical Practice: The Case for Switching to Practical Benefit to Assess Applied Research Findings

ABSTRACT

Relying on effect size as a measure of practical significance is turning out to be just as misleading as using p-values to determine the effectiveness of interventions for improving clinical practice in complex organizations such as schools. This article explains how effect sizes have misdirected practice in education and other disciplines. Even when effect size is incorporated into RCT research the recommendations of whether interventions are effective are misleading and generally useless to practitioners. As a result, a new criterion of practical benefit is recommended for evaluating research findings about the effectiveness of interventions in complex organizations where benchmarks of existing performance exist. Practical benefit exists when the unadjusted performance of an experimental group provides a noticeable advantage over an existing benchmark. Some basic principles for determining practical benefit are provided. Practical benefit is more intuitive and is expected to enable leaders to make more accurate assessments as to whether published research findings are likely to produce noticeable improvements in their organizations. In addition, practical benefit is used routinely as the research criterion for the alternative scientific methodology of improvement science that has an established track record of being a more efficient way to develop new interventions that improve practice dramatically than RCT research. Finally, the problems with practical significance suggest that the research community should seek different inferential methods for research designed to improve clinical performance in complex organizations, as compared to methods for testing theories and medicines.     

ARE PROMISES MEANINGLESS IN AN UNCERTAIN CROWDFUNDING ENVIRONMENT?

We use a prominent crowdfunding organization, Kickstarter, to analyze the factors that determine timeliness of delivery of rewards to financial backers. We seek to determine the extent to which promised rewards are delivered on time and to characterize projects that have stronger likelihood of timely delivery of rewards. We find that lateness commonly occurs, yet cannot be explained universally with any given set of project characteristics, implying that the uncertainty of rewards involved with crowdfunding entities is difficult to overcome. (JEL D71, D83, L82)