Sustained attention, a key cognitive skill that improves during childhood and adolescence, tends to be worse in some emotional and behavioural disorders. Sustained attention is typically studied in non-affective task contexts; here, we used a novel task to index performance in affective versus neutral contexts across adolescence (N = 465; ages 11–18). We asked whether: (i) performance would be worse in negative versus neutral task contexts; (ii) performance would improve with age; (iii) affective interference would be greater in younger adolescents; (...) (iv) adolescents at risk for depression and higher in anxiety would show overall worse performance; and (v) would show differential performance in negative contexts. Results indicated that participants performed more poorly in negative contexts and showed age-related performance improvements. Those at risk of depression performed more poorly than those at lower risk. However, there was no difference between groups as a result of affective context. For anxiety there was no difference in performance as a function of severity. However, those with higher anxiety showed less variance in their reaction times to negative stimuli than those with lower anxiety. One interpretation is that moderate levels of emotional arousal associated with anxiety make individuals less susceptible to the distracting effects of negative stimuli. (shrink)

Principles and the context, by J. C. Bennett.--Love monism, by J. M. Gustafson.--Responsibility in freedom, by E. C. Gardner.--The new morality, by G. Fackre.--When love becomes excarnate, by H. L. Smith.--Situational morality, by R. W. Gleason.--The nature of heresy, by G. Kennedy.--Situation ethics under fire, by J. Fletcher.

This expanded edition of C L Hardin's ground-breaking work on colour features a new chapter, 'Further Thoughts: 1993', in which the author revisits the dispute ...

Background: The role of nurses as patient advocates is one which is well recognised, supported and the subject of a broad body of literature. One of the key impediments to the role of the nurse as patient advocate is the lack of support and legislative frameworks. Within a broad range of activities constituting advocacy, whistleblowing is currently the subject of much discussion in the light of the Mid Staffordshire inquiry in the United Kingdom and other instances of patient mistreatment. As (...) a result steps to amend existing whistleblowing legislation where it exists or introduce it where it does not are underway. Objective: This paper traces the development of legislation for advocacy. Conclusion: The authors argue that while any legislation supporting advocacy is welcome, legislation on its own will not encourage or enable nurses to whistleblow. (shrink)

What ecological advantages do animals gain by being able to detect, extract and exploit wavelength information? What are the advantages of representing that information as hue qualities? The benefits of adding chromatic to achromatic vision, marginal in object detection, become apparent in object recognition and receiving biological signals. It is argued that this improved performance is a direct consequence of the fact that many animals' visual systems reduce wavelength information to combinations of four basic hues. This engenders a simple categorical (...) scheme that permits a rich amount of sensory information to be rapidly and efficiently employed by cognitive machinery of limited capacity. (shrink)

This text demonstrates that symbolic representation and related problem-solving methods offer significant opportunities to clarify and articulate concepts of design.

Yellow sun in a blue sky. Green leaves caressed by the wind. Open the shutters of the eye, that window of the soul, and all such things are revealed. Nothing is more apparent than that things have colors, and that we have immediate perceptual access to those colors.

This work has been selected by scholars as being culturally important and is part of the knowledge base of civilization as we know it. This work is in the public domain in the United States of America, and possibly other nations. Within the United States, you may freely copy and distribute this work, as no entity has a copyright on the body of the work. Scholars believe, and we concur, that this work is important enough to be preserved, reproduced, and (...) made generally available to the public. To ensure a quality reading experience, this work has been proofread and republished using a format that seamlessly blends the original graphical elements with text in an easy-to-read typeface. We appreciate your support of the preservation process, and thank you for being an important part of keeping this knowledge alive and relevant. (shrink)

At 8 a.m. I get in my car and set off for work. At 7:59 a.m., before I started it, my car was at rest; at 8:01 a.m. it is in motion. When a thing is not in motion, it is at rest, and when it is not at rest, it is in motion. But what was the state of the car at 8:00 a.m., as I was starting it? It would be inaccurate to say that it was in motion (...) but it would be inaccurate, also, to say that it was at rest: it was “just starting.” But, if whenever a thing is not in motion it is at rest, the state of “just starting”—or, of course, the comparable state of “just stopping”—must be either a state of motion or a state of rest. Which? (shrink)

This detailed and sympathetic, but not uncritical, study of On Liberty' argues for the general consistency and coherence of Mill's defence of individual liberty, but maintains that there are significant non-utilitarian elements in his arguments.

In the essay On Liberty , Mill put forward his famous principle that society may only interfere with those actions of an individual which concern others and not with actions which merely concern himself. The validity of this principle depends on there being a distinction between self-regarding and other-regarding actions. But the concept of self-regarding actions has been severely criticised on the ground that all actions affect others in some way and are therefore other-regarding. The notion of self-regarding actions appears (...) to be completely discredited. Very recently, however, there has been some dissatisfaction with the traditional debunking of Mill on this score. Two serious and important attempts to reinterpret the principle were made by Mr J. C. Rees in an article entitled ‘A Re-Reading of Mill on Liberty’, and by Mr Alan Ryan in two brief but extremely useful contributions. My aim is to discuss these reinterpretations of Mill, and on the basis of this, build up what I think is the correct account of Mill's notion of self-regarding actions. (shrink)