Fine Tuning Explained? Multiverses and Cellular Automata

The objective of this paper is analyzing to which extent the multiverse hypothesis provides a real explanation of the peculiarities of the laws and constants in our universe. First we argue in favor of the thesis that all multiverses except Tegmark’s “mathematical multiverse” are too small to explain the fine tuning, so that they merely shift the problem up one level. But the “mathematical multiverse" is surely too large. To prove this assessment, we have performed a number of experiments with cellular automata of complex behavior, which can be considered as universes in the mathematical multiverse. The analogy between what happens in some automata (in particular Conway’s “Game of Life") and the real world is very strong. But if the results of our experiments can be extrapolated to our universe, we should expect to inhabit—in the context of the multiverse—a world in which at least some of the laws and constants of nature should show a certain time dependence. Actually, the probability of our existence in a world such as ours would be mathematically equal to zero. In consequence, the results presented in this paper can be considered as an inkling that the hypothesis of the multiverse, whatever its type, does not offer an adequate explanation for the peculiarities of the physical laws in our world.     

Measuring Collective Efficacy Among Children in Community-based Afterschool Programs: Exploring Pathways toward Prevention and Positive Youth Development

Collective efficacy refers to a perceived sense of connectedness and willingness to intervene among youth, and is a potential aspect of positive youth development (Larson in Am Psychol 55:170–183, 2000; Lerner et al. in Child Dev 71:11–20, 2000; Sampson et al. in Science 277:918–924, 1997). Theoretically, those who feel connected to a group that is empowered to positively influence the behavior of their peers may demonstrate fewer problem behaviors. Few studies, however, have measured the impact of youth perceptions of collective efficacy. As a relatively new child-related research topic, there is much to be learned. One contribution to the foundation of this research agenda begins by evaluating the reliability and validity of a measure of collective efficacy with elementary children attending community-based afterschool programs. This paper describes the internal consistency reliability and various indicators of construct and concurrent validity of the Collective Efficacy Among Children Scale. The measure was found to have high internal consistency reliability. Construct validity was tested using exploratory factor analyses of collective efficacy including the dimensions of willingness to intervene and cohesion found in previous research (Sampson et al. in Science 277:918–924, 1997). Concurrent validity assessed relations between the scale and other measures in theoretically congruent ways. Using Hierarchical Linear Models to account for children's nestedness in after-school programs, connectedness was found to be more related to emotional adjustment, particularly children’s prosocial attitudes (caring about others and sharing). Children’s perception of the willingness of the group to intervene was found to be related to less problem behavior, (i.e. smoking tobacco, drinking alcohol, vandalism, and stealing). The implications suggest that future research should further explore children’s collective efficacy, and ways to foster its development in youth-serving afterschool settings.     

Leadership in entrepreneurial organizations: context and motives

Although organizational contexts have an influence on leadership, and some of their characteristics may facilitate (through weak structures) or inhibit (through strong structures) the leaders' behaviors, the extent of their influence has rarely been studied. Indeed, research of the influence of some types of contexts (entrepreneurial vs. non-entrepreneurial) on the emergence of certain variables (leaders' motives) is even scarcer. This paper analyses this influence in 40 companies, interviewing their leaders to obtain a qualitative register of their motives, and administering questionnaires to members of their respective management teams. The hypothesis considered was that, in 'weak' contexts (entrepreneurial), the leaders' motives would be more salient than in 'strong' contexts (non-entrepreneurial). The results largely confirm this hypothesis with respect to behaviors that are directly related to three main motives (power, affiliation and achievement). These results are discussed, and practical suggestions are provided for future research.     

Fifteen-month-old infants attend to shape over other perceptual properties in an induction task

This study examined whether infants privilege shape over other perceptual properties when making inferences about the shared properties of novel objects. Forty-six 15-month-olds were presented with novel target objects that possessed a nonobvious property, followed by test objects that varied in shape, color, or texture relative to the target. Infants generalized the nonobvious property to test objects that were highly similar in shape, but not to objects that shared the same color or texture. These results demonstrate that infants’ attention to shape is not specific to lexical contexts and is present at the early stages of productive language development. The implications of these findings for debates about children's shape bias, in particular, and the nature of infants’ categories more generally, are discussed.     

Comparing the handwriting behaviours of true and false writing with computerized handwriting measures

The goal of this study is to compare the handwriting behaviours of true and false writing. Based on the cognitive load and dis‐automaticity known to be experienced while communicating a deceptive message, we hypothesized a difference (in temporal and spatial, pressure measures and peak velocities) between the handwriting of true vs. false messages. Thirty‐four participants wrote true and false sentences on a digitizer, which is part of a new system called the Computerized Penmanship Evaluation Tool (ComPET). The ComPET evaluates brain‐hand performance, as manifested through handwriting behaviour, and was found to be a valid measure for detecting the dis‐automaticity that is indicative of certain diseases in the clinical field. Differences were found in mean pressure, spatial measures (mean stroke length and mean stroke height), but no differences were found in temporal measures and in the number of peak velocities. The use of ComPET in lie detection is discussed. Copyright © 2009 John Wiley & Sons, Ltd.     

Alzheimer’s disease and impairment of the Self

Impairment of the Self has been described in frontal–temporal dementia but little research has been carried out in patients with Alzheimer’s disease (AD).

Objective

The aim of this study was to explore changes in the self in patients with AD.

Method

Forty-seven patients with mild to moderate AD were examined using a semi-structured scale designed to assess the self-concept along three dimensions, namely, the Material Self, the Social Self and the Spiritual Self.

Results

The majority of patients (43 out of 47) presented impairment of at least one dimension of the Self. When only one dimension was affected, it was always the Social Self. The severity of impairment of the Self was correlated to the impairment of the semantic autobiographical memory and apathy.

Conclusion

The Self is impaired in AD and the Social Self dimension appears to be more vulnerable in AD than other dimensions.     

Differential Reinforcement in Simple Discrimination Learning in 10- to 20-Month-Old Toddlers

The Psychological Record - The present study examined two procedures for teaching simple discrimination to six toddlers aged 10- to 20-months. A pair of toys was displayed in the windows of an...     

Effects of Decision Training on Decision Making and Performance in Young Tennis Players: An Applied Research

This study examined the effectiveness of a 10-week decision training program on decision making and performance in tennis. Decision training was based on the analysis combining tactical questioning and video feedback about players own actions. A quasi-experimental design with intermediate tennis players (control group, n = 6; experimental group, n = 5) was developed over 18 weeks, divided into 3 phases: preintervention, postintervention, and retention. A total of 13,383 game play actions were analyzed to test differences. Experimental group improves significantly decision making and performance and maintained improvements during the retention phase. Video feedback combined with questioning is recommended to achieve sport expertise.     

Follow-up of coping skills training in adults with sickle cell disease: analysis of daily pain and coping practice diaries.

This study examined the 3-month follow-up effects of a pain coping skills intervention in African American adults with sickle cell disease. Sixty-seven participants were randomly assigned to either a coping skills condition or a disease-education control condition. Multivariate analyses applied to summary measures of coping, laboratory pain perception, and clinical measures indicated that participants in the coping intervention reported significantly lower laboratory pain and significantly higher coping attempts at 3-month follow-up in comparison with the control condition. Multilevel random effects models applied to prospective daily diaries of daily pain, health care contacts, and coping practice indicated that on pain days when participants practiced their strategies, they had less major health care contacts in comparison with days when they did not use strategies.