Long-term follow-up of physical activity behavior in older adults.

OBJECTIVE: To examine the contribution of social-cognitive factors (self-efficacy and affect) in predicting long-term physical activity in a sample of older adults (N=174). DESIGN: A prospective design assessed physical activity and psychosocial variables at 2 and 5 years following a 6-month randomized, controlled exercise trial. MAIN OUTCOME MEASURES: The primary outcome variable was self-reported physical activity, with previous behavior, self-efficacy, and affect assessed as determinants of physical activity. RESULTS: Covariance modeling analyses indicated that physical activity at Year 2 was the strongest predictor of physical activity at 5-year follow-up. Both self-efficacy and affect at Year 2 were also associated with physical activity at Year 5, as was original treatment condition. Variables accounted for 35% of the variance in Year 5 activity. CONCLUSION: Older adults with higher levels of physical activity, more positive affect, and higher self-efficacy at Year 2 were more likely to continue to be active at Year 5. This study is one of the longest follow-ups of exercise behavior in older adults and has implications for structuring environments to maximize the maintenance of physical activity.     

Moral conflict and ordinary emotional experience

Conclusion If we ask ourselves whether ultimate moral conflicts exist, and if we take seriously the goal of capturing ordinary emotional experience in our views about morality, we find the evidence mixed. We might have some reason for concluding that some situations are ultimate moral conflicts, but we also have good reasons of the same kind for concluding that these situations are not ultimate moral conflicts. So this kind of argument does not provide secure enough footing for any sort of powerful criticism of moral theories which deny the existence of ultimate moral conflicts. Those who want to argue for the reality of ultimate moral conflicts can still argue from something other than ordinary emotional experience. Any such alternative strategy, though, will involve a retreat from the idea that ordinary emotional experience provides unambiguous support for the existence of ultimate moral conflicts and a secure point from which to criticize moral theories.I conclude, then, that accepting the reality of ultimate moral conflicts does not allow a truer picture of ordinary emotional experience. I am not sure, though, that this should be good news for those who believe in a moral realm without ultimate moral conflicts. What is most striking about ordinary emotional experience is not its tendency to support one or another picture of the moral realm, with or without ultimate moral conflicts, but its failure to endorse any very determinate picture of a moral realm. This suggests a rather shocking gap in our understanding of the concepts of moral obligation, prohibition, and permission, concepts which, after all, are alleged to play a familiar and vital role in our lives. Perhaps this gap can be filled by arguments beginning somewhere other than ordinary emotional experience. (Although skeptics will point to the failure of deontic logicians to find any decisive reason to choose between accounts that do and do not permit ultimate moral conflicts.) Alternatively, though, the ambiguity of ordinary emotional experience on the question of ultimate moral conflict might provide one kind of support for the suspicion, famously entertained by Elizabeth Anscombe, that the word ought, used to refer to a specifically moral realm, is a word containing no intelligible thought: a word retaining the suggestion of force, and apt to have a strong psychological effect, but which no longer signifies a real concept at all - No content could be found in the notion morally ought; if it were not that - philosophers try to find an alternative (very fishy) content and to retain the psychological force of the term. I am grateful to Annette Baier, Richard Bell, Robert Ginsberg, Patricia Greenspan, Carolyn Hartz, Eugene Heath, Don Hubin, and Walter Sinnott-Armstrong for their valuable comments on earlier drafts.

---

     

Intracerebroventricular Infusion of the NMDA Receptor-Associated Glycine Site Antagonist 7-Chlorokynurenate Impairs Water Maze Performance but Fails to Block Hippocampal Long-Term Potentiation in Vivo

Most previous studies investigating the relationship betweenN-methyl- -aspartate receptor-dependent synaptic plasticity and learning have employed drugs that either compete with glutamate for access to the primary agonist binding site (e.g., -2-amino-5-phosphopentanoic acid) or block the associated ion channel (e.g., dizocilpine). This study targeted the glycine receptor site located on the NMDA receptor complex. Chronic intracerebroventricular infusion of the glycine site antagonist 7-chlorokynurenate (7CK; 75 mM, 0.5 μl/h, icv, for up to 14 days) impaired performance of male Lister hooded rats during acquisition of a spatial reference memory task in the water maze. In addition, however, these animals showed sensorimotor deficits, including a prolonged righting reflex, ataxia, and difficulty in staying on the escape platform. On completion of behavioral testing, the rats were anesthetized with urethane and an attempt was made to induce LTP in the hippocampus ipsilateral to the infusion cannula. Both control and 7CK-infused animals displayed equivalent long-term potentiation (LTP) 60 min posttetanus. A novel analytical technique for assaying drug tissue levels involving high-performance liquid chromotography with fluorescence detection revealed that tissue levels of 7CK in hippocampus were extremely low and unlikely to be sufficient to affect LTP, as observed. These findings neither support nor compromise the LTP/learning hypothesis, but they illustrate some of the problems of using drugs to elucidate the neurobiological mechanisms of learning and memory and the importance of a within-subjects design incorporating behavioral, physiological, and biochemical measures.     

The contribution of external and internal features to the matching of unfamiliar faces

The relative efficacy of external and internal features in matching unfamiliar faces was studied in three experiments in which the subjects matched target and test faces differing in terms of external or internal features, or both. In Experiment 1 only full congruency between target and test faces was considered a match; in Experiments 2 and 3 faces sharing the same external and internal features were also considered to be matches. A total of 100 subjects matched 192 pairs of target and test faces in a same-different task. Reaction times and matching errors were recorded for analyses of variance. In all three experiments performance was best when either all features matched or all features mismatched, with mismatches having a slight edge. When matches of external and internal features with the target faces were inconsistent with each other, mismatches of external features led to faster responses in Experiments 1 and 2, and mismatches of internal features led to faster responses in Experiment 3. The results suggest that since faces are configurational stimuli, face matching is influenced by the non-relevant set of features; and that mismatches, especially of external features, influence face matching more than matches do.     

Relationship Between Intelligence and Occupational Adjustment and Functioning: A Literature Review

This article reviews 50 years of research investigating the relationship between intelligence and various aspects of occupational and vocational adjustment as they relate to both exceptional and nonexceptional individuals. Trends in this research are identified and summarized, and implications for counselors involved in vocational programming are discussed.