辅助生殖技术引发的案例伦理分析

辅助生殖技术虽然给无数个不育夫妇带来了福音,但同时也给人类传统的伦理观念带来了冲击和挑战,同时它的滥用还可能给人类造成灾难。通过对由辅助生殖技术引发的7个典型案例的伦理分析和研究,来进一步探讨辅助生殖技术中伦理问题及其对策。     

Hinge versus twist: the effects of 'reference surfaces' and discontinuities on stereoscopic slant perception

Stereoscopic slant perception around a vertical axis (horizontal slant) is often found to be strongly attenuated relative to geometric prediction. Stereo slant is much greater, however, when an adjacent surface, stereoscopically in the frontal plane, is added. This slant enhancement is often attributed to the presence of a 'reference surface' or to a spatial change in the disparity gradient (introducing second and higher derivatives of disparity). Gillam, Chambers, and Russo (1988 Journal of Experimental Psychology: Human Perception and Performance 14 163-175) questioned the role of these factors in that placement of the frontal-plane surface in a direction collinear with the slant axis (twist configuration) sharply reduced latency for perceiving slant whereas placing the same surface in a direction orthogonal to the slant axis (hinge configuration) had little effect. We here confirm these findings for slant magnitude, showing a striking advantage for twist over hinge configurations. We also examined contrast slant measured on the frontal-plane surface in the hinge and twist configurations. Under conditions where test and inducer surfaces have centres at the same depth for twist and hinge, we found that twist configurations produced strong negative slant contrast, while hinge configurations produced significant positive contrast or slant assimilation. We conclude that stereo slant and contrast effects for neighbouring surfaces can only be understood from the patterns and gradients of step disparities present. It is not adequate to consider the second surface merely as a reference slant for the first or as having its effect via a spatial change in the disparity gradient.     

Diminutives facilitate word segmentation in natural speech: Cross-linguistic evidence

Final-syllable invariance is characteristic of diminutives (e.g., doggie), which are a pervasive feature of the child-directed speech registers of many languages. Invariance in word endings has been shown to facilitate word segmentation (Kempe, Brooks, & Gillis, 2005) in an incidental-learning paradigm in which synthesized Dutch pseudonouns were used. To broaden the cross-linguistic evidence for this invariance effect and to increase its ecological validity, adult English speakers (n=276) were exposed to naturally spoken Dutch or Russian pseudonouns presented in sentence contexts. A forced choice test was given to assess target recognition, with foils comprising unfamiliar syllable combinations in Experiments 1 and 2 and syllable combinations straddling word boundaries in Experiment 3. A control group (n=210) received the recognition test with no prior exposure to targets. Recognition performance improved with increasing final-syllable rhyme invariance, with larger increases for the experimental group. This confirms that word ending invariance is a valid segmentation cue in artificial, as well as naturalistic, speech and that diminutives may aid segmentation in a number of languages.     

The use of PowerPoint shareware for making Jeopardy!--type games in the teaching of psychology

We describe the use of readily available templates to create a Jeopardy!--type game using PowerPoint slides suitable for psychology courses. The templates can accommodate information from any psychology class and can easily be used to incorporate languages other than English. A major limitation of the templates is that they are only available as shareware on internet sites and the links to such sites can be unreliable. To avoid this problem we present our own template. Differences between the shareware and our own program are noted, as are ways to use the game to stimulate interest in psychology.     

Efficient statistics, common currencies and the problem of reward-harvesting

The mammalian brain is equipped with reward-harvesting mechanisms that efficiently categorize and value the behavioral choices that lead to rewards necessary for survival. In this context, 'efficiency' embodies the idea of achieving maximum returns for minimal energetic investments and places a premium on how an animal represents its available options. But the capacity to efficiently represent choices is a profoundly difficult problem because representations for behavioral choice depend intimately on the statistics of information arriving not just from the sensory world and but also from within the creature itself. Any complete account of decision-making in mammals must efficiently connect the internal needs to the perceptual apparatus available to a creature moment-to-moment.     

Luther's Schem Hamphoras

This article provides a concise summary of Luther's anti‐Jewish treatise, On the Schem Hamphoras and On the Lineage of Christ (March 1543) and describes its purpose, interworkings, and scatological rhetoric. The treatise is interpreted as Luther's defense of the Second Commandment over against Jewish superstitions regarding the name of God; his attempt to undermine the credibility of the rabbis and their influence on the Christian Hebraists; and his further strengthening of his platform for the expulsion of the Jews as initially articulated in On the Jews and Their Lies (January 1543).     

Black Males Living in an Antithetical Police Culture: Keys for Their Survival

Police killings of unarmed Black males is an all too often occurrence. Just how many have succumbed in this manner is unknown due to a lack of a comprehensive reporting method. However, an undeniable fact and reality is that the Black community, and society as a whole, suffers as a result of the loss of these individuals. The authors of this article suggest that police shootings of unarmed Black males may never cease. The authors propose simple but thoughtful ways in which Black males should be educated by the Black community (family, church, and other institutions) regarding general survival skills and more specifically survival skills in regards to police encounters. Implications for further research are also presented.     

Relationships between self-determination theory and theory of planned behavior applied to physical activity and exercise behavior in chronic pain

This study examined the relationships between self-determination theory (SDT) and theory of planned behavior (TpB) applied to physical activity and exercise behavior (PA&E) in people with chronic pain. Two hundred and eleven adults with chronic musculoskeletal pain (28 males and 183 females, age range 18 to 82 years, mean age 43 years) were recruited from online support groups and clinic networks in the United States. Participants completed SDT measures relevant to PA&E on perceived autonomy support, autonomy, competence, and relatedness, as well as TpB measures relevant to PA&E on intention, attitudes, subjective norms, and perceived behavioral control. Correlational techniques and canonical correlation analysis were performed to examine the relationships and variance within and between theoretical dimensions. Overall, the SDT set accounted for 37% of the TpB variance and the TpB set accounted for 32% of the SDT set variance. The results indicate there are statistical similarities and differences between concepts in SDT and TpB models for PA&E. Using both empirical guidance and clinical expertise, researchers and practitioners should attempt to select and integrate non-redundant and complementary components from SDT, TpB, and other related health behavior theories.     

Coping sense of humor reduces effects of stereotype threat on women's math performance

Two studies demonstrated that coping sense of humor buffered women against the effects of stereotype threat on math performance. Using a correlational design, Study 1 demonstrated that women low in coping sense of humor assessed their performance on standardized math tests lower than did men and lower than did women high in coping sense of humor. Using an experimental design, Study 2 showed that coping sense of humor was positively related to women's performance on a math test taken under conditions of stereotype threat but not under conditions of no stereotype threat. Mediation analyses suggest that in the stereotype-threat condition, state anxiety mediated the relationship between coping sense of humor and test performance. Women higher in coping sense of humor performed better because they felt less anxiety while taking the test.