A Note on the Conversion of Item Parameters Standard Errors

The relations among alternative parameterizations of the binary factor analysis (FA) model and two-parameter logistic (2PL) item response theory (IRT) model have been thoroughly discussed in literature. However, the conversion formulas widely available are mainly for transforming parameter estimates from one parameterization to another. There is a lack of discussion about the standard error (SE) conversion among different parameterizations, when SEs of IRT model parameters are often of immediate interest to practitioners. This article provides general formulas for computing the SEs of transformed parameter values, when these parameters are transformed from FA to IRT models. These formulas are suitable for unidimensional 2PL, multidimensional 2PL, and bi-factor 2PL models. A simulation study is conducted to verify the formula by providing empirical evidence. A real data example is given in the end for an illustration.     

Exploration of anomalous perceptual experiences in migraine between attacks using the Cardiff Anomalous Perceptions Scale

Distortions in sensory experiences that precede a migraine attack have been extensively documented, the most well-known being the visual aura. Distortions in the experience of other senses are also reported as part of an aura, albeit less frequently, together with changes in the perception or ownership of the body or body parts. There are many examples of differences in aspects of visual perception between migraine and control groups, between attacks, but not as much on unusual experiences involving other senses, the sense of the body or the experience of the environment. Seventy-seven migraine (33 with aura) and 74 control participants took part. Anomalous perceptions were experienced by both migraine and control groups, but more with migraine experienced them and rated them as more distressing, intrusive and frequent. Associations with reports of visual triggers of migraine and visual discomfort are presented. This study is the first to show relationships between these factors.     

The changing relationship between people and their job – the validity of career information

ABSTRACT

An overview of the evolution of career information in light of the changing nature of the world of work is presented. Owing to the constant fundamental changes in the labour market, the distribution of paid work has been also constantly changing. In this article, a more dynamic and – often temporary – interplay between citizens and their professional context is proposed. The case of Hungary has been used to describe the changing nature between people and their jobs. The historical overview helps explain the development of career information from pre-modernity to post-modernity and justifies the need for a more dynamic model of work adjustment and individual career development.     

Constitutivism and the virtues

In Self-Constitution, I argue that the principles governing action are “constitutive standards” of agency, standards that arise from the nature of agency itself. To be an agent is to be autonomously efficacious, and the categorical and hypothetical imperatives arise from those two attributes. These principles are also “constitutive” of agency in two more specific ways. First, they meet the “constitution requirement”: the object must meet the standard in question, at least to some extent, in order to be the kind of object that it is. Second, they meet the “self-constitution requirement”: the object makes itself into the kind of object that it is by conforming to the standard. That is, the agent makes herself into an agent, and into the particular agent who she is, by conforming to those standards. Some neo-Aristotelians believe that Aristotelian virtues are constitutive standards. In this paper, I first ask why moral philosophers should focus on the virtues at all, considering the views of David Hume, Philippa Foot, and Aristotle. I then ask whether Aristotelian virtues meet the constitution requirement, and suggest that there are grounds for this view in the Nicomachean Ethics. But Aristotelian virtues do not meet the self-constitution requirement, which leaves Aristotle unable to explain moral responsibility. I end by examining the role that Aristotelian virtues could play in a Kantian ethic.