Estimation and visualization of confusability matrices from adaptive measurement data

We present a simple but effective method based on Luce’s choice axiom [Luce, R.D. (1959). Individual choice behavior: A theoretical analysis. New York: John Wiley & Sons] for consistent estimation of the pairwise confusabilities of items in a multiple-choice recognition task with arbitrarily chosen choice-sets. The method combines the exact (non-asymptotic) Bayesian way of assessing uncertainty with the unbiasedness emphasized in the classical frequentist approach.We apply the method to data collected using an adaptive computer game designed for prevention of reading disability. A player’s estimated confusability of phonemes (or more accurately, phoneme-grapheme connections) and larger units of language is visualized in an easily understood way with color cues and explicit indication of the accuracy of the estimates. Visualization of learning-related changes in the player’s performance is considered.The empirical validity of the choice axiom is evaluated using the game data itself. The axiom appears to hold reasonably well although a small systematic violation is observable for the smallest choice-set sizes.     

A Bayesian-optimal principle for learner-friendly adaptation in learning games

Adaptive learning games should provide opportunities for the student to learn as well as motivate playing until goals have been reached. In this paper, we give a mathematically rigorous treatment of the problem in the framework of Bayesian decision theory. To quantify the opportunities for learning, we assume that the learning tasks that yield the most information about the current skills of the student, while being desirable for measurement in their own right, would also be among those that are efficient for learning. Indeed, optimization of the expected information gain appears to naturally avoid tasks that are exceedingly demanding or exceedingly easy as their results are predictable and thus uninformative. Still, tasks that are efficient for learning may be experienced as too challenging, and the resulting failures can lower motivation. Therefore, in addition to quantifying the expected informational benefit for learning of any prospective task to be presented next, we also model the expected motivational cost of its presentation, measured simply as the estimated probability of failure in our example model. We propose a “learner-friendly” adaptation algorithm that chooses the learning tasks by optimizing the expected benefit divided by the expected cost. We apply this algorithm to a Rasch-like student model implemented within a real-world application and present initial results of a pilot experiment.     

Lost in Translation? The Need for ‘Upstream Engagement’ with Nanotechnology on Trial

Nowadays, the criticism of the so-called ‘deficit model’ and the need for ‘upstream engagement’ in science and technology are becoming part of the master narratives of public policies in many countries, especially concerning nanotechnology. This may be considered as a major success for STS scholars, whose research results have largely contributed to this change, especially those concerning the GMO controversies. Some STS scholars thus move from a position of distant and critical observers to the role of experts in social engineering or advisers of policy-makers. However, in their enthusiasm concerning the expected benefits of upstream engagement, institutions, TA practitioners and social scientists seem to ignore some important limitations as well as the implicit framing assumptions of the concept. Based on an experience made by a group of social scientists in the Grenoble area—one of the major ‘nanodistricts’ in Europe—our paper shows that the ‘upstream engagement’ concept is still embedded in a linear model of innovation and is not very useful to anyone pursuing the co-production of innovations. It is especially true when socio-technical networks are already aligned by powerful actors and a worldwide agenda as in the case of nanotechnology. In order to give an opportunity for public engagement to have a larger impact on decision-making, we propose an alternative approach, which combines Actor–Network Theory (ANT), as an analytical tool, with the reflexive and ongoing implementation of public participation. Public engagement is probably one of the critical loci where STS scholars must reflect on the articulation between the knowledge they produce and public policies in action.     

Water as a Commons: An Exploratory Study on the Motives for Collective Action Among Italian Water Movement Activists

In many communities, supplying water and sanitation is a huge task, and the fact that these essential services can be carried out by the private sector is a debated issue. This article presents an exploratory study aimed to identify the range of motives for collective action shared by activists of the Italian Movement for ‘Public Water’. In‐depth interviews were conducted with 28 activists and were qualitatively analysed. Five main motivational categories emerged: defending the right to water, preserving community ties, opposing to the Government and ‘water sellers’, preserving the environment and money interests. Each motive is based on a specific representation of the issue of water and privatization process. Findings provide further support for the importance of moral convictions and sense of community in collective action development and suggest a critical reconsideration of the role played by collective efficacy. The results are discussed in the framework of the psychosocial literature on collective action and community psychology perspectives on participatory processes. Copyright © 2012 John Wiley & Sons, Ltd.     

Playing the game the child allots

This paper explores the relationship between play and interpretative verbalization in child analysis. Through examination of a clinical case, the paper distinguishes between two different modes of interpretative interventions in play. It is the contention of the paper that the analyst’s capacity to tolerate tension and respond to the roles the child assigns him widens the area of play, facilitating a space for thinking through. Interpretation is formulated in two distinct ways: (a) interpreting from the context of the roles the analyst assumes within play, respecting the games and facilitating the patient’s understanding; (b) interpreting at a distance from play, on the one hand distinguishing the area of play, and on the other hand analyzing that which occurs verbally and non‐verbally.     

Framing the Ultimatum Game: Gender differences and autonomic responses

The present study aimed at investigating whether the way offers are framed in the Ultimatum Game (UG) affects behavioral and autonomic responses in men and women. The “I give you” and “I take” expressions were used as gain and loss frames, respectively. Skin conductance and heart rate were recorded as indices of autonomic activation in response to unfair, mid‐value, and fair offers. Acceptance rates were higher in men than in women under the gain frame. Moreover, men showed higher acceptance rates under the gain than under the loss frame with mid‐value offers, whereas women's choices were not affected by frame. On the physiological level, men produced differential autonomic response patterns during decision‐making when offers were presented under gain and loss framing. The “I take” frame, by acting as a loss frame, elicited in men the characteristic defensive response pattern that is evoked by aversive stimulation, in which increases in skin conductance are coupled with increases in heart rate. On the other hand, the “I give you” frame, by acting as a gain frame, elicited in men increases in skin conductance associated with prevailing heart rate deceleratory responses, reflecting a state of enhanced attention and orienting. In contrast, women's autonomic reactivity was not affected by frame, consistent with behavioral results. Phasic changes in heart rate were crucial in revealing differential functional significance of skin conductance responses under different frames in men, thus questioning the assumption that this autonomic measure can be used as an index of negative emotional arousal in the UG.     

A Multiphasic Personality Schedule (Minnesota): III. the Measurement of Symptomatic Depression

La Fave's habit lag construct, which specifies conditions under which previously automatized motor responses become disruptive of subsequent performance, was tested. Performance under stress was also examined as a possible factor in the occurrence of habit lag. Following a visual discrimination task, 48 women performed motor responses simultaneously: (a) repeating an invariant lever movement and (b) pushing one of two keys. The habit lag construct was supported, as Ss who had automatized responses produced more errors than nonautomatized Ss. Performance under stress, by calling attention to the risk of habit lag, reduced errors. Habit lag accounts for an intrusive type of error often found in motor performance where negative transfer fails to do so.     

Perspectives of Adults Living With Autism Spectrum Disorder: Psychosocial and Occupational Implications

The incidence of Autism Spectrum Disorder (ASD) has increased over the past decade suggesting a need for further research. This article describes a two phase phenomenological study which explored the lived experience of ASD and its psychosocial effects on relationships, socialization, and occupational participation. Phenomenological interviews were given to three women and three men with high functioning ASD. Phase two of the research included two additional individual interviews and four focus groups. Results indicated themes regarding participants' desires to engage in social occupations, and barriers caused by the nature of the ASD which may successfully be addressed by occupational therapy.     

Aspects of Activity Participation as Risk Factors for Conduct Problems in Children and Adolescents: A Literature Review Using Ecological Systems Theory

This article reviews a wide range of risk factors associated with the development of conduct problems in children, with a particular focus on the influence of time spent engaged in different types of activities. The review reveals the behavioral benefits to children and adolescents of participation in activities with physical, social, and restful properties and those that can be described as structured. Further highlighted is the need for parents and occupational therapists to be aware of children's time use and daily activity participation, and the potential for these activities to be harnessed to facilitate positive behavioral outcomes for children.