Are self-explanations always beneficial?

We present evidence suggesting that the effect of self-explanations on learning is not always beneficial and, in fact, in some contexts has a detrimental effect. Over eight sessions, fourth-graders engaged in investigation of a database with the goal of identifying causal effects. In a separate task, children in one condition also generated self-explanations regarding the mechanisms underlying the causal effects they believed to be present. In a comparison condition, they did not. On a transfer task, children in the no-explanations condition showed superior causal inference performance. The findings are discussed as reflecting the development of “data-reading” skill with which an emphasis on explanations may interfere.     

A Bayesian random effects model for testlets

Standard item response theory (IRT) models fit to dichotomous examination responses ignore the fact that sets of items (testlets) often come from a single common stimuli (e.g. a reading comprehension passage). In this setting, all items given to an examinee are unlikely to be conditionally independent (given examinee proficiency). Models that assume conditional independence will overestimate the precision with which examinee proficiency is measured. Overstatement of precision may lead to inaccurate inferences such as prematurely ending an examination in which the stopping rule is based on the estimated standard error of examinee proficiency (e.g., an adaptive test). To model examinations that may be a mixture of independent items and testlets, we modified one standard IRT model to include an additional random effect for items nested within the same testlet. We use a Bayesian framework to facilitate posterior inference via a Data Augmented Gibbs Sampler (DAGS; Tanner & Wong, 1987). The modified and standard IRT models are both applied to a data set from a disclosed form of the SAT. We also provide simulation results that indicates that the degree of precision bias is a function of the variability of the testlet effects, as well as the testlet design.The authors wish to thank Robert Mislevy, Andrew Gelman and Donald B. Rubin for their helpful suggestions and comments, Ida Lawrence and Miriam Feigenbaum for providing us with the SAT data analyzed in section 5, and to the two anonymous referees for their careful reading and thoughtful suggestions on an earlier draft. We are also grateful to the Educational Testing service for providing the resources to do this research.     

Ethical and methodological aspects of medical computer data bases and knowledge bases

Ethical problems are related to computer data bases, containing data on individuals and groups of persons, as well as to computer knowledge bases, containing general rules and elements of expert systems.In the present essay the following conclusions are made regarding computer data bases: privacy, security, and confidentiality of medical computer data bases should be ensured. This duty should rest with physicians in hospitals. The principle of informed consent should be applied to gathering information which is to be stored and processed by computers. Information stored in computer data bases should not be used for purposes for which the subjects (patients as well as personnel) have not given their consent. In order to decrease the possibility of misuses of medical data bases containing information on individuals, these registers should not be linked to other central data bases.     

Personal Identity, Fission and Time Travel

One problem that has formed the focus of much recent discussion on personal identity is the Fission Problem. The aim of this paper is to offer a novel solution to this problem.

The Enhanced Agentic Diversity Perspective (EADP): An appeal for Co-creating an accommodative social space so that diversity unlocks innovativeness rather than problems

We propose in this article an Enhanced Agentic Diversity Perspective (EADP), which is derived from the concept of agentic resources in social relational theory. EADP recognizes that all human beings are equally agents, that agentic expressions differ due to variation of individual access to power resources (individual, relational and cultural) and that the current social conditions serve to promote agentic diversity by enhancing all the three domains of power resources. In addition, EADP comprises a proposal for the development of accommodative social spaces. We argue that only in an accommodative social space can diversity unlock innovation; otherwise, it serves as a source for conflict. A constructive, nonhierarchical account of diversity, such as EADP is needed under current social conditions for the optimal becoming of idiosyncratic human agents as well as human society as a whole.     

Struggling with self: The personal projects of students seeking psychological counselling

Personal projects can be described as self-articulated goals and related sequences of actions. In order to investigate what kind of personal projects people with psychological problems have, and how they work on them, 28 counselling client students, 44 students of psychology, and 45 students of technology completed a Finnish version of Little's (1987) Personal Project Inventory. The results showed that the clients scored lower on project accomplishment than other groups. Their personal projects were frequently self-related, while those of the technology students were often task-related. The higher their sense of coherence, self-esteem, mental health and life satisfaction, the more subjects expected to accomplish their projects, the more frequently they described task-related projects, the less negative affect they reported, and the less frequently they described self-related projects. These results suggest that psychologically distressed individuals struggle with self-related projects and have problems in accomplishing their projects.     

How transport users perceive personal safety apps

Fear of crime and a perceived sense of being unsafe have the potential to discourage individuals from using public transport. This paper presents analysis of the results of a survey on aspects of personal safety apps and how individuals perceive them in relation to their personal safety, privacy and their preference to purchase them. It explores their willingness to download for free or purchase such an app, their impression of features that an app might include such as revealing their location, how they would rate police force monitoring if included as a feature of the app and finally how they would rate a personal safety app against other technologies used to improve perceived transport user safety. The results show that the majority of respondents would consider downloading a personal safety app. Lower levels of engagement with technology, a higher level of education, being resident in the city of Dublin (as opposed to surrounding regions) and privacy concerns tended to make females less likely to consider downloading the app. These findings were not repeated for males. The results suggest that younger respondents were more likely to be negatively impacted by the inclusion of a facility to report location in an emergency on the app, while the older age groups were more likely to be unaffected. For the location tracking feature, cluster membership, gender and resident outside Dublin were significant. Less than half of the respondents would be negatively influenced in their decision to buy the app if a cost of €1.79 were introduced. When respondents were asked about the inclusion of police monitoring as a feature of the app, the results suggested that police monitoring had a more definite effect on perceived personal safety than on privacy.     

Disagreeing about who we are

ABSTRACT

One argument that has been suggested for conventionalism about personal identity is that it captures that certain disagreements about personal identity seem irresolvable, without being committed to the view that these disagreements are merely verbal. In this paper, I will take the considerations about disagreement used to motivate conventionalism seriously. However, I will use them to motivate a very different, novel, and as yet unexplored view about personal identity. This is the view that personal identity is a non-representational concept, the nature of which isn’t to be accounted for in terms of what entity it represents, but its non-representational role. I highlight that we find structurally very similar concerns about disagreement in another philosophical debate, namely in meta-ethics. But, in meta-ethics, such sorts of considerations are, traditionally, thought to support one distinctive view: meta-ethical expressivism, a non-representational view about normative thought and discourse. This suggests that we should take a similar view seriously for personal identity. I also develop what such an unfamiliar view might look like, using expressivism as a template. On this view, judgements about personal identity are plans that regulate who to hold accountable.     

Novelty as Opportunity and Risk: A Situated Cognition Analysis of Psychological Control and Novelty Seeking

Novel products present unknown opportunities as well as unknown risks. Past research suggested that low psychological control highlights risks and reduces the adoption of novel products. Consistent with a situated cognition perspective, we show that this depends on the specifics of low control. Across five studies, novelty seeking was lower after consumers thought about instances of low (vs. high) personal influence, but higher after consumers thought about instances of low (vs. high) predictability of the world. Thinking about a lack of personal influence increased the perceived importance of personal capability and in turn impaired the exploration of novel options, whereas thinking about an unpredictable world increased the perceived importance of preparedness for an unknown future and in turn the exploration of novel options. Throughout, perceiving low personal influence benefited familiar products, whereas seeing the world as unpredictable benefited novel products. This highlights that understanding consumers' responses to a lack of control requires joint consideration of the specifics of threat and task, consistent with situated cognition principles.