Third party assisted conception: an African perspective

The central importance of reproduction in all human cultures has given rise to many methods and techniques of assisting reproduction or overcoming infertility. Such methods and techniques have achieved spectacular successes in the Western world, where processes like in vitro fertilization (IVF) constitute a remarkable breakthrough. In this paper, the author attempts to reflect critically on assisted reproduction technologies (ART) from the background and perspective of African culture, a culture within which human reproduction is given the highest priority but which also exhibits a highly ambivalent attitude to modern technology-assisted methods of reproduction. The author considers the ethical crux of reproductive technologies to be linked to the issue of the moral status of the human embryo and argues that a morally significant line of demarcation cannot be drawn between embryos and other categories of humans.     

生生:儒家超越死亡焦虑的根本路径

“生生”思想是儒家超越死亡焦虑的根本路径,具体体现在以下六个方面:宇宙自然视域下的“原始反终”; 血脉和精神传承视域下的“父死子继”; 丧礼和祭礼视域下的“慎终追远”; 体生和不朽视域下的“存顺没宁”; 生死抉择视域下的“杀身成仁”; 知命和立命视域下的“顺受其正”。儒家以“生生”思想统摄生死,彰显了深沉的人文智慧。     

4~7岁儿童依据对繁殖的朴素理解区分植物和非生物的认知发展

以152名4~7岁儿童为被试,采用访谈和判断选择任务探查他们对植物繁殖的认知。结果发现,①4~7岁儿童对植物繁殖的认知可分为不理解、部分理解和确切理解三种水平,儿童在入学后7岁能依据对植物繁殖的朴素理解区分植物与非生物;②通过降低材料难度和任务形式要求的难度,可以有效地发掘年幼儿童的认知潜能,即大部分6岁学前儿童就能够理解植物繁殖;③任务难度的改变对处于部分理解水平的5、6儿童影响更为显著：使他们在选择任务上的认知成绩优于访谈任务,对有明显果实和种子植物的认知优于无明显果实和种子植物的认知     

Occupationally Embedded Exercise Versus Rote Exercise and Psychosocial Response in College-Aged Females

Community integration through occupational engagement is an integral tenet of occupational therapy. However, little is known about how pets may assist this process. This study explores community integration through pet ownership as a meaningful, lifelong, occupation for one person with bipolar illness receiving Assertive Community Treatment. Using a case study approach, eight qualitative interviews, as well as observation and analysis of pet photos, were conducted with the mental health consumer and also with members of her social network. Data were analyzed inductively according to the constant comparative approach. The findings reveal that pet ownership assisted the person to counterbalance and move beyond stigma through pets as enablers of: “continuity,” “belonging,” “action and self-construction,” “acceptance,” and “participation.” This process was influenced by the “severity of illness,” “view of community,” and “supports and resources.” The results contribute to our understanding of pet ownership as a means to community integration. The study indicates that to enable persons with a mental illness to engage in pet ownership, occupational scientists need to examine and understand this occupation in the broader context of recovery, health, and well-being. A perspective of pet ownership as meaningful occupation challenges occupational therapists to develop strategies to actively engage clients and their pets in their community.     

Information processing as an intrinsic property of biological systems: Origin and dynamics of information

Information processing is a main property which distinguishes life from inorganic matter. Its background is the recognition activity of biomacro‐molecules based on quantum non‐demolition measurements. Reflective arrows in the set of mappings appearing from quantum measurements do form a hypercyclic structure which realizes information transfer and allows a system to self‐reproduce and evolve. These arrows correspond to Goedel numbers created inside a system.     

Does time fly when you're counting down? The effect of counting direction on subjective time judgment

We show that counting downward while performing a task shortens the perceived duration of the task compared to counting upward. People perceive that less time has elapsed when they were counting downward versus upward while using a product (Studies 1 and 3) or watching geometrical shapes (Study 2). The counting direction effect is obtained using both prospective and retrospective time judgments (Study 3), but only when the count range begins with the number “1” (Study 2). Furthermore, the counting direction affects peoples' attitude toward the product, their likelihood of using it again, and their purchase intentions. We test several plausible accounts for the counting direction effect, including task difficulty, numerical anchoring, and arousal. We find preliminary evidence that downward counting feels shorter because it is more arousing than upward counting.     

Patterns of Mother-Infant Contact: The Significance of Lateral Preference

The use of assisted reproductive technology is increasing rapidly. Research, although sparse, has resulted in inconsistent findings as to the developmental prognosis for infants conceived by assisted reproductive techniques such as in vitro fertilization and the use of fertility drugs. In the present study, the authors compared twins who were spontaneously conceived with those who were conceived through assisted reproductive technology. The authors found differences in birth weight and gestational age. Infants conceived by assisted reproductive technology fared worse than did those who were spontaneously conceived. The authors found no differences between the groups in mental development at 24 months of age, but they found evidence of differences in physical development. Implications of the findings are discussed.     

More is still not better: Testing the perturbation model of temporal reference memory across different modalities and tasks

The ability of the perturbation model (Jones & Wearden, 2003) to account for reference memory function in a visual temporal generalization task and auditory and visual reproduction tasks was examined. In all tasks the number of presentations of the standard was manipulated (1, 3, or 5), and its effect on performance was compared. In visual temporal generalization the number of presentations of the standard did not affect the number of times the standard was correctly identified, nor did it affect the overall temporal generalization gradient. In auditory reproduction there was no effect of the number of times the standard was presented on mean reproductions. In visual reproduction mean reproductions were shorter when the standard was only presented once; however, this effect was reduced when a visual cue was provided before the first presentation of the standard. Whilst the results of all experiments are best accounted for by the perturbation model there appears to be some attentional benefit to multiple presentations of the standard in visual reproduction.     

A Structural Equation Analysis of the Wide Range Assessment of Memory and Learning in a Clinical Sample

A maximum likelihood confirmatory factor analysis was performed by applying LISREL VII to the Wide Range Assessment of Memory and Learning (WRAML) in a clinical sample (N = 271). Analyses were designed to determine which of 10 hypothesized oblique factor solutions could best explain memory as measured by the WRAML. Competing latent variable models were identified in previous studies and monographs on memory. Findings supported a three-factor model including Verbal Memory, Visual Memory, and Attention/Concentration factors. Our results are consistent with previous studies suggesting that attention is an important component of memory as measured by the WRAML. This study replicates previous research in which the Learning Index was not empirically supported.     

Prolonged development of auditory skills: A role for perceptual anchoring?

Many auditory skills continue to develop beyond infancy and even into adolescence, but the factors underlying this prolonged development remain poorly understood. Of interest here is the contribution of on-line statistical learning of stimulus repetitions (anchoring) to the development of auditory spectral and temporal discrimination, as well as the potential contributions of auditory attention and working memory. Children, aged 6–13 years, as well as adults (age range: 21–33 years) were tested on auditory frequency and duration discrimination. Each type of discrimination was measured in two conditions (XAB and XXXAB) designed to afford different levels of anchoring by varying the number of repetitions of a standard stimulus (X) prior to the presentation of the test tone (A or B) in each trial. Auditory attention and working memory were also assessed. Whereas duration and frequency discrimination in either condition did not reach adult level prior to 11 years of age, the magnitude of the anchoring effect was similar across ages. These data suggest that perceptual anchoring matures prior to the attainment of adult-like discrimination thresholds. Likewise, neither attention nor working memory could account for the observed developmental trajectories. That auditory discrimination and anchoring follow dissociable developmental trajectories suggests that different factors might contribute to the development of each. We therefore conclude that although anchoring might be necessary for attaining good auditory discrimination, it does not account for the prolonged development of auditory frequency and duration discrimination in school-aged children.