Remembering Numbers in Old Age: Mnemonic Training Versus Self-Generated Strategy Training

The effectiveness of two memory training programs designed to enhance four-digit number recall was examined in 90 healthy older adults. One group received instruction and training in the number-consonant mnemonic, whereas another group was instructed to adopt their own encoding and retrieval strategies to enhance number recall. Also, a control group receiving no training between testing occasions was included. The criterion task was administered according to the Buschke selective reminding procedure. Posttest performance was evaluated with and without cognitive support for remembering (i.e., verbal cues). Under unsupported conditions, the mnemonic group improved number recall following training and the self-generated strategy group showed a tendency in the same direction. When support was provided, group differences in favor of the two training groups increased. In addition, no training-related gains were observed in two verbal transfer tasks. The relatively similar patterns of gains in the two intervention groups were discussed in terms of advantages and disadvantages in the two training regimens balancing each other.     

Rousseau's Insight

My comment makes a point out ofRousseau's original insight: that education forsocial participation ought to start within thestudent's lifeworld, and not, as in our days, with the immediatedemands of modern, time-ridden consumerculture. When time is turned into a commodityand place is turned into a transit point forpeople constantly on the move, presence in acommon lifeworld is lost. I take issue with thedominant thinking of education in terms of timeand efficiency, and suggest that we startthinking of education more in terms of placeand presence. I propose that modern thinkers ofeducation – of which I mention a few here –contributed significantly to the pedagogy ofplace or presence. I don't see time as a stringmade up of past-present-future, but rather asan expanding mental and pragmatic universe ofhere-and-nows. The term kairos catchesthis presence as the capacity for doing theright thing at the right moment, that is, themoment when the past has prepared the ground sothat the future can come as a gift. Thisconception is, I think, an important ground forthe idea of an education for citizenship.     

Enhanced occipital and anterior cingulate activation in men but not in women during exposure to angry and fearful male faces

Blood-oxygenation-level-dependent signal was measured with functional magnetic resonance imaging in 24 healthy young subjects (12 men and 12 women) during viewing of angry, fearful, and neutral male and female face pictures. Exposure to angry male as opposed to angry female faces activated the visual cortex and the anterior cingulate gyrus significantly more in men than in women. A similar sex-differential brain activation pattern was present during exposure to fearful but not neutral faces. Previous behavioral studies indicate enhanced physiological arousal in men but not in women during exposure to angry male as opposed to female faces, and brain imaging studies have shown that the occipital cortex and the anterior cingulate gyrus are influenced by activity in the autonomic nervous system as well as by visual attention. Hence, we suggest that the elevated occipital and anterior cingulate activation in men during confrontation with other angry and fearful males may reflect enhanced vigilance in a potentially dangerous situation.     

Bird on Dispositions and Antidotes

In The Philosophical Quarterly , 48 (1998), Alexander Bird raises an objection against the conditional analysis of dispositions: where an 'antidote' is present all the supposed conditions for manifestation of a disposition are fulfilled but the manifestation does not occur. But Bird's argument suffers from equivocation. If we spell out properly whether the disposition's conditions are to include the presence of the antidote or not, the apparent counter-examples disappear. So his examples do not undermine the conditional analysis of dispositions; they show merely that we need to be careful about describing the examples consistently.     

In Defense of Rawlsian Fair Equality of Opportunity

Richard Arneson argues that Fair Equality of Opportunity (FEO) should be rejected, since it is not only too weak and too strong, but also problematically meritocratic. The paper aims to defend FEO, and argues that it is not too weak, since, pace Arneson, it does apply to the problem of stunted ambition. The argument from meritocracy is shown to be based on a conflation of different senses of meritocracy. Finally, it is shown that FEO, correctly interpreted, gives intuitive answers to the examples put forward to bolster the too strong charge. It is concluded that Arneson’s refutation of FEO fails.     

Semi-sparse PCA

It is well known that the classical exploratory factor analysis (EFA) of data with more observations than variables has several types of indeterminacy. We study the factor indeterminacy and show some new aspects of this problem by considering EFA as a specific data matrix decomposition. We adopt a new approach to the EFA estimation and achieve a new characterization of the factor indeterminacy problem. A new alternative model is proposed, which gives determinate factors and can be seen as a semi-sparse principal component analysis (PCA). An alternating algorithm is developed, where in each step a Procrustes problem is solved. It is demonstrated that the new model/algorithm can act as a specific sparse PCA and as a low-rank-plus-sparse matrix decomposition. Numerical examples with several large data sets illustrate the versatility of the new model, and the performance and behaviour of its algorithmic implementation.