Referential Set Presentation Effects on Complementation by 6-Year-Olds

What difficulties do children encounter when responding to complementation instructions? The responses of 50 children to six complementation requests were examined. For half of the children, the objects in the referential set were pooled, and for the other half, they were physically separated by category (pencils were presented in a pencil box, buttons in a sewing kit, and balls of yarn in a knitting basket). Reinforcing the identifying status of the semantic property by separating the objects into categories led to an increase in the number of responses bearing on the subset designated in the instructions (e.g., in response to “Give me everything that is not a black button,” the children handed over only the nonblack buttons). In contrast, older children gave responses based on the entire set. The meaning attributed by children to object properties and the effects of that attribution on processing mode merit further study.     

Psychometric properties of the Death Anxiety Scale (DAS) among HIV/AIDS patients

AIDS patients and HIV carriers who are aware of their condition are under multiple kinds of stress with adverse effects on their emotional state and personal and social activity. This paper reports the psychometric properties of the DAS (Death Anxiety Scale) using the Spanish version in the clinical setting. The sample is made up of 148 HIV/AIDS patients (109 men and 39 women). The internal consistency of the scale was .72 and its test-retest reliability was .70. Principal components analysis extracted five factors that jointly accounted for 56.5% of the total variance. As, on the whole, these results are very similar to those reported by other authors, it is concluded that the Spanish DAS is a valid instrument for the assessment of death anxiety in Spanish HIV/AIDS patients.     

To be or not to be: an exploration of ethnic identity development in context

This qualitative study focused on the intersection of personal and ethnic identities among forty African American, Puerto Rican, Dominican, and Chinese American high school students. The patterns in content indicated that for the Puerto Ricans, the intersection of their personal and social identities was a series of accommodations to a positive peer climate and a resistance to being Dominican. For the other ethnic groups, the intersection of their personal and social identities consisted of a process of resistance and accommodation to negative stereotypes projected on them by their peers and, for African Americans, themselves.     

Influence of Different Sitting Positions on Healthy Infants' Reaching Movements

The authors analyze the influence of different sitting positions (ring and flexion) on the reaching performance (spatiotemporal variables) of full-term infants 6 and 7 months old. In addition, they correlated level of trunk control, measured by the Segmental Assessment of Trunk Control, with performance during reaching. The different sitting positions only influenced the reaching movements of 6-month-old infants, who showed the best performance in the ring position. However, this influence was observed only for the trunk displacement, deceleration time, movement units, straightness index and mean velocity. In contrast, there was no influence of positions on 7-month-old infants’ reaching performance. Regarding the correlations, it was observed that infants with more level of trunk control showed a better performance when reaching, regardless of position and the age assessed.     

Empathy is Associated with Meaning of Life and Mental Health Treatment but not Religiosity Among Brazilian Medical Students

The purpose of this study was to investigate the influence of spirituality, religiosity, personal beliefs, and previous contact with health issues on the level of empathy in medical students. Jefferson Scale of Empathy—Student Version, WHOQOL-Spirituality, Religiousness and Personal Beliefs, and Duke University Religion Index were applied to 285 Brazilian medical students. The findings suggest that meaning of life and previous mental health treatment but not Religiosity were positively related to empathy. We suggest that more attention should be given for prevention and treatment of mental health issues, and further studies are needed to understand and replicate these findings.     

On the Philosophy of Bitcoin/Blockchain Technology: Is it a Chaotic,Complex System?

The philosophy of blockchain technology is concerned, among other things, with blockchain ontology, how it might be characterised, how it is being created, implemented, and adopted, how it operates in the world, and how it evolves over time. This paper concentrates on whether Bitcoin/blockchain can be considered a complex system and, if so, whether it is a chaotic one. Beyond mere academic curiosity, a positive response would raise concerns about the likelihood of Bitcoin/blockchain entering a 2010‐Flash‐Crash‐type of chaotic regime, with catastrophic consequences for financial systems based on it. The paper starts by highlighting the relevant details of the Bitcoin/blockchain ecosystem formed by the blockchain itself, bitcoin end users (payers and payees), capital gains seekers, miners, full nodes maintainers, and developers, and their interactions. Then the Information Theory of Complex Systems is briefly discussed for later use. Finally, the blockchain is investigated with the help of Crutchfield's Statistical Complexity measure. The low non‐null statistical complexity value obtained suggests that the blockchain may be considered algorithmically complicated but hardly a complex system and unlikely to enter a chaotic regime.