Cognitive and Non-Cognitive Factors Contributing to the Longitudinal Identification of Successful Older Adults in the Betula Study

ABSTRACT

Studies of successful aging have typically defined elderly who fall in the upper end of a distribution of test scores as successful. A different definition of successful aging requires that older adults fall at or above the mean level of younger adults and maintain this level over time. Here we examined this definition of successful aging in a sample of 1463 individuals between the ages of 50 of 85. Based on principal coordinate analysis of cognitive and non-cognitive variables, we identified a group of 55 (8.3%) 70–85 years olds that were high functioning. This group of elderly showed elevated performance on a range of cognitive tasks. Non-cognitive factors that characterized this group included education and subjective health. The participants were retested 5 years later and the same type of analysis was repeated. Of the remaining individuals who initially were classified as high functioning, 18 (35%) remained high functioning and thus met the definition for successful aging. Years of education was a significant predictor of who remained successful over time.     

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.     

Recall of Subject-Performed Tasks,Verbal Tasks,and Cognitive Activities Across the Adult Life Span: Parallel Age-Related Deficits

Motor activity during encoding of verbal information has been suggested to reduce age differences in episodic memory. Here we examined memory for sentences encoded with enactment (SPTs, subject-performed tasks) or without enactment (VTs, verbal tasks) in a population-based sample consisting of 10 groups ranging in age from 35 to 80 years (N = 1000). Memory performance was assessed by immediate free- and category-cued recall. Degree of clustering was measured by the adjusted ratio of clustering score. Recall of cognitive activities served as a complementary measure of memory for performed tasks. Sentence recall showed a gradual decline across age, of about the same magnitude for SPTs and VTs, in both free and cued recall. Clustering in free recall was higher for SPTs than for VTs, but there were no age differences in clustering. A pattern of gradual decline from age 35 was observed also in activity recall, regardless of whether the activities involved motor activity or not. Across the memory measures, differences in education accounted for all of the age-related variance in performance among the younger (35-55 years) but not the older groups (60-80 years), suggesting that genuine aging effects in these measures are more prominent in old age. Together, the results indicate that age differences in episodic memory, in line with most, if not all, types of encoding support, generalize across the performed/non-performed distinction.     

Evolution, Discovery, and Interpretations of Arthropod Mushroom Bodies

Mushroom bodies are prominent neuropils found in annelids and in all arthropod groups except crustaceans. First explicitly identified in 1850, the mushroom bodies differ in size and complexity between taxa, as well as between different castes of a single species of social insect. These differences led some early biologists to suggest that the mushroom bodies endow an arthropod with intelligence or the ability to execute voluntary actions, as opposed to innate behaviors. Recent physiological studies and mutant analyses have led to divergent interpretations. One interpretation is that the mushroom bodies conditionally relay to higher protocerebral centers information about sensory stimuli and the context in which they occur. Another interpretation is that they play a central role in learning and memory. Anatomical studies suggest that arthropod mushroom bodies are predominately associated with olfactory pathways except in phylogenetically basal insects. The prominent olfactory input to the mushroom body calyces in more recent insect orders is an acquired character. An overview of the history of research on the mushroom bodies, as well as comparative and evolutionary considerations, provides a conceptual framework for discussing the roles of these neuropils.     

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.     

Parasuicide and Use of Intoxicants Among Norwegian Adolescents

Self-reported history of parasiticide was analyzed with respect to use of intoxicants in a national sample of 12,000 Norwegian adolescents. The proportion of parasuicides was 8.3%, being higher among girls and among those living without both parents, and it increased with age, with use of intoxicants, depression, and loneliness. Calculations of relative risks and adjusted odds ratios demonstrated positive associations between parasiticide and use of intoxicants, and no significant gender differences were found. The findings are discussed with reference to impacts of intoxication and risk-taking behavior.     

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.