Comparing interspersed requests and social comments as antecedents for increasing student compliance

Two students were alternately presented with interspersed high-compliance requests and social comments as antecedents to low-compliance requests. An initial comparison demonstrated similar positive effects on compliance for interspersed requests and social comments. A second analysis indicated that the effectiveness of social comments for increasing compliance was related to the time interval between social comments and low-compliance requests.     

Stimulus control in the use of landmarks by pigeons in a touch-screen task

Pigeons were tested in a search task on the surface of a monitor on which their responses were registered by a touch-sensitive device. A graphic landmark array was presented consisting of a square outline (the frame) and a colored “landmark.” The unmarked goal, pecks at which produced reward, was located near the center of one edge of the frame, and the landmark was near it. The entire array was displaced without rotation on the monitor from trial to trial. On occasional no-reward tests, the following manipulations were made to the landmark array: (a) either the frame or the landmark was removed; (2) either one edge of the frame or the landmark was shifted; and (3) two landmarks were presented with or without the frame present. On these two-landmark tests, the frame, when present, defined which was the “correct” landmark. When the frame was absent, the “correct” landmark was arbitrarily determined. Results showed that pecks of 2 pigeons were controlled almost solely by the landmark, pecks of 3 were controlled primarily by the landmark but the frame could distinguish the correct landmark, and 1 bird's behavior was controlled primarily by the frame. Stimulus control in this search task is thus selective and differs across individuals. Comparisons to other search tasks and to other stimulus control experiments are made.     

Women,ectogenesis and ethical theory

ABSTRACT The nature of two influential theories on the moral status of abortion logically commits them to welcoming the advent of ectogenesis (the gestation of human beings outside the womb) as a solution to the abortion conflict. However, qualitative research into women's response to ectogenesis reveals that both women in favour and women opposed to abortion rights reject the technology on surprisingly similar grounds. The abortion framework which led women to reject ectogenesis as an ethical resolution to unwanted pregnancy is contrasted with the moral framework which shapes formal ethical discussions of abortion. It is argued that the need for ethical relevance requires the views of ethicists to move closer to those of women [1].     

信息高速公路对医学发展的影响

自１９９３年美国率先提出“信息高速公路”这一全新概念以来,在世界范围内迅速兴起了一股“信息高速公路”热,因为它的建立与发展必将在社会各个领域产生巨大而深刻的影响。作为一名医务工作者,尤其应该意识到,在未来的几十年里,信息高速公路将通过其对临床医疗与康复、预防医学、医学教育、医学科研等多方面的影响来彻底改变传统的生物医学模式。     

Children's capacity to agree to psychological research: knowledge of risks and benefits and voluntariness

A series of studies investigated the capacity of children between the ages of 7 and 12 to give free and informed consent to participation in psychological research. Children were reasonably accurate in describing the purpose of studies, but many did not understand the possible benefits or especially the possible risks of participating. In several studies children's consent was not affected by the knowledge that their parents had given their permission or by the parents saying that they would not be upset if the children refused. In contrast, other studies found that children were much more likely to stop their participation if the experimenter said explicitly that she would not be upset if they stopped. We suggest that experimenters should pay more attention to describing the possible risks and benefits of participation in research, and that they should also make it clearer to children that they are free to stop once they have begun.     

2001年的科学哲学

一种民主制度的最重要也是讨论最少的任务之一就是要保护它的成员免遭这种制度中的意识形态的伤害.必须正确地看待所有的意识形态.人们必须把它们当作神话故事来看待,它们能告诉人很多有趣的事,但也包含了很多谬误和令人生厌的谎言.当人们按照某一观点行动时,他们的态度也应该像密探一样,为了在一个陌生的国家里获得成功而采纳它的信仰并在细枝末节上按照这些信仰去做,但并不全盘接受.这一点适用于所有的信仰,适用于基督教上帝的存在这一信仰,适用于所有的人生来平等的信仰,也适用于科学.那么,这是否是一种陌生和荒谬的态度呢?科学当然总是处在与权威主义和迷信战斗的前沿.相对于宗教信仰而言,我们有了越来越大的思想自由,这应当归功于科学;人类从古代的僵硬思维方式中解放出来,也应当归功于科学.今天,这些思维方式仅仅是一些糟糕的     

Induced delivery of anencephalic fetuses: a response to James L. Walsh and Moira M. McQueen

James Walsh and Moira McQueen accurately conclude that the early delivery of anencephalic fetuses is morally acceptable, but the reasoning they use to reach that conclusion is flawed. First, the principle of double effect does not require a weighing of good and evil, but rather seeks a sufficient reason for tolerating the physical evil indirectly intended. Second, the principle of double effect requires a clear distinction between physical and moral causality. Third, the Catholic moral tradition will not admit direct and intended killing of the innocent. Rather, early delivery of anencephalic fetuses is permissible because of the pathology associated with delivery of anencephalic fetuses at full term. Thus, the early delivery of an anencephalic infant is acceptable if the purpose of the moral act is avoiding a pathological condition on the part of the mother.