Rhythmic organization of heart rate in breast-fed and bottle-fed newborn infants

Heart rates and behavioural states of 14 breast-fed and 14 bottlefed newborn infants were assessed every 30 seconds for 2 continuous hours. The 240 observations of heart rate were treated as time-series data and spectrum-analysed for behavioural rhythmicities. Of the 28 infants, 25 showed reliable cycles in heart rate; 22 of the 25 infants showed a dominant frequency with a 30–60 min periodicity, one that approximates the basic-rest activity cycle (BRAC). In addition to this basic cycle, additional higher frequency cycles in long-term heart rate variability were evident in the spectra of many infants. Breast-fed newborns had greater numbers of reliable cycles in heart rate than bottle-fed newborns. Further, breast-fed newborns had lower overall mean heart rates and lower mean heart rates in Quiet and Active Sleep states than bottle-fed newborns. Bottle-fed newborns were observed more often in Quiet Sleep than breast-fed newborns. Without knowledge of the specific mechanisms causing these behavioural differences, the results of this study suggest that the context in which breast-feeding occurs results in a more complex and energy-efficient pattern of behavioural organization than the context of bottle-feeding.     

Response patterns and cardiovascular effects during response sequence acquisition by humans.

The effects of temporal delays imposed between successive responses and of vitamin C administration were examined on the acquisition of response sequences and on cardiovascular reactivity during sequence acquisition. Thirteen adult subjects (6 female, 7 male), in good health, gave written consent prior to participating in 12 weekly 45-min sessions. Points, exchanged for money after each session, were presented when subjects completed 15-response sequences on a touch-sensitive three-response keypad. A position counter increased from 0 to 14 as subjects emitted correct responses in the sequence. Four novel 15-response sequences were presented each session. No delays were imposed between successive responses during the acquisition of one sequence; delays were imposed immediately following each response during the acquisition of a second sequence, thereby delaying response feedback; delays were imposed following feedback during acquisition of a third sequence, resulting in the removal of the stimulus correlated with sequence position; and, as a control condition, delays were imposed following feedback, but stimuli correlated with sequence position were reinstated prior to the next response during acquisition of a fourth sequence. Subjects were exposed to one of two delay durations (0.2 and 0.5 or 0.5 and 1.0 s) each session, and delay durations alternated every session. During Weeks 5 to 8, subjects received 3 grams of vitamin C per day, whereas during Weeks 1 to 4 and 9 to 12, subjects received placebo under single-blind conditions. All subjects acquired the sequences, as evidenced by decreasing percentages of incorrect responses across trials. When temporal delays were imposed between successive responses during sequence acquisition, acquisition efficiency was enhanced. Examination of response latencies suggested that the status of preceding responses (i.e., correct or incorrect) rather than the status of the position counter influenced subsequent responding. Cardiovascular effects were inversely related to the length of the temporal delay. Neither cardiovascular reactivity or sequence acquisition were related to vitamin C administration.     

The Evolution of Consciousness and the Theology of Nature

Theology and philosophy have traditionally assumed a radical split between human beings and the rest of creation. Philosophically, the split is usually justified in terms of a locus humanus , some one cognitive trait that human beings possess and nonhuman animals do not. Theologically, this trait is usually identified as that which makes us in the image of God. Research in animal cognition, however, suggests that we are not unique in as many respects as we think we are. This suggests that we rethink the idea of the image of God. In light of this, I propose that we think of nature itself as being in the image of God, with humankind as part of the broader natural and theological process.     

Relativist ethics, scientific objectivity, and concern for human rights

This paper comments on the conflict between ethical relativism and anthropologists’ concerns with rights, and tries to show that neither scientific objectivity nor respect for cultural diversity require denying an extracultural stance for ethical judgments. An earlier version of this paper was presented at a symposium entitled “Ethics in Science: Special Problems in Anthropology and Archaeology” held at the 1998 Annual Meeting of the American Association for the Advancement of Science (AAAS), Philadelphia, PA, 15 February, 1998.     

Research ethics committees: a regional approach

Guidelines for Institutional Review Boards (IRBs) or research ethics committees exist at national and international levels. These guidelines are based on ethical principles and establish an internationally acceptable standard for the review and conduct of medical research. Having attained a multinational consensus about what these fundamental guidelines should be, IRBs are left to interpret the guidelines and devise their own means of implementing them. Individual and community values bear on the interpretation of the guidelines so different IRBs attain different levels of effectiveness. In the Caribbean and Pan American regions there are few IRBs. Obstacles to the establishment and function of IRBs are exacerbated in developing regions like these by differences in language, literacy, and local value systems; education, administrative expertise, facilities, and access to information are also limited. A regional IRB network might facilitate more uniform ethical review in developing countries, and simplify IRB procedures. This revised version was published online in August 2006 with corrections to the Cover Date.     

《淮南子》人力管理的心理学思想

本文认为《淮南子》管理心理学思想,是对先秦道家的继承和发展。文章从人员的甄选心理、任用心理、激励心理三个方面对其中人力管理心理学思想作了整理。     

Storytellers and Scenario Spinners: Some Reflections on Religion and Science in Light of a Pragmatic, Evolutionary Theory of Knowledge

Asserting that both scientists and religious thinkers are involved in telling stories about the past and spinning scenarios about the future, I first compare and contrast the purposes of scientific and religious storytelling. Then, in light of some recent work on brain and language evolution, I offer a possible story about how humans might have become storytellers. Finally, I discuss how religious stories might be evaluated pragmatically and even scientifically by developing Lakatosian-type research programs.     

A Systems Perspective on the Introduction of Narrative Practice in Human Services Organizations in the Era of Managed Care

General System Theory is used to examine the structure and activity of human services organizations for conditions which support the introduction of selected narrative ideas in a systemic approach to mental health services. The inquiry includes examination of the influence of larger systems (such as managed care companies and regulatory bodies) on such introduction.     

The importance of human needs during peacetime, retrospective peacetime, and the Persian Gulf War

Study 1 investigated the importance of human needs during peacetime in 1993 using a sample of 137 full-time workers in several industries in the United States. Study 2 examined the importance of needs in 1990 (retrospective peacetime) and in 1991 (during the Persian Gulf War)(both measured during the war) using a sample of 564 college students in the United States. In both studies, two levels of needs (higher-order and lower-order needs) were identified during peacetime. Study 2 revealed that during the war, all needs were rated as more important and only one factor was identified. During peacetime, the safety of one’s own life was significantly more important than the safety of the country which was rated as the least important need. During the war, the safety of the country was as important as the safety of one’s own life. Students who had spouse, family members, and friends in the Middle East during Desert Storm differed significantly from those who did not in war-related stress and the importance of several needs.     

Genes, religion and society: The developing views of the churches

This paper (1) reviews and analyzes the positions on genetics taken in the official statements of Christian churches in the United States, together with church institutions of global status, and 2) offers suggestions about possible future responses of the churches to genetics and biotechnology.