Neurological subtle signs and cognitive development: A study in late childhood and adolescence

Introduction and Aim: Neurological subtle signs (NSS) are often observed during the neurological examination of children and tend to disappear with age. Their persistence into late adolescence or young adulthood has been related to psychiatric and neurocognitive disorders. To provide a better understanding of their functional basis, a longitudinal correlational study with neurocognitive measurements was performed.

Method: We conducted multiple regression and correlation analyses of NSS with demographic and cognitive measures on a subset of 341 healthy children (56% males), taking part in a longitudinal dental study. Participants, whose ages ranged between 11–15 years, at first evaluation, undertook yearly, during 5 years, a 6-item NSS exam (producing a total score ranging between 0–18) and a comprehensive battery of neurocognitive tests. Effects of age, gender, IQ, and 7 neurocognitive factors on NSS were analyzed.

Results: Over the years, NSS scores correlated consistently with selective attention (Stroop test), motor speed (finger tapping), and visuomotor speed (pegboard speed).

Discussion: These results suggest that the disappearance of NSS in late childhood and adolescence occurs primarily in parallel with the development of motor and visuomotor functions and secondarily in relation to higher order functions such as selective attention (Stroop) and executive control (B-A Trails difference).     

The transfer of Crel contextual control (same,opposite, less than,more than) through equivalence relations

According to Relational Frame Theory (RFT) C_rel denotes a contextual stimulus that controls a particular type of relational response (sameness, opposition, comparative, temporal, hierarchical etc.) in a given situation. Previous studies suggest that contextual functions may be indirectly acquired via transfer of function. The present study investigated the transfer of C_rel contextual control through equivalence relations. Experiment 1 evaluated the transfer of C_rel contextual functions for relational responses based on sameness and opposition. Experiment 2 extended these findings by evaluating transfer of function using comparative C_rel stimuli. Both experiments followed a similar sequence of phases. First, abstract forms were established as C_rel stimuli via multiple exemplar training (Phase 1). The contextual cues were then applied to establish arbitrary relations among nonsense words and to test derived relations (Phase 2). After that, equivalence relations involving the original C_rel stimuli and other abstract forms were trained and tested (Phase 3). Transfer of function was evaluated by replacing the directly established C_rel stimuli with their equivalent stimuli in the former experimental tasks (Phases 1 and 2). Results from both experiments suggest that C_rel contextual control may be extended via equivalence relations, allowing other arbitrarily related stimuli to indirectly acquire C_rel functions and regulate behavior by evoking appropriate relational responses in the presence of both previously known and novel stimuli.     

On the Ethics of Democratic Access to Web Information

Floridi’s work, although diverse and multifaceted, portrays a solid coherence across his different lines of work. Among his wealth of interests and results, we highlight his recent work on information logics, on the ethics of information technology, and his rigorous (and vigorous) philosophical analysis of recent technological trends and developments in information technology. In the present article we illustrate, by means of some connecting arguments, the diversity and coherence of Floridi’s work. We also show how his work, although fundamentally philosophical in nature, can be used to build solid foundations for scientific and entrepreneurial endeavours of higher quality. More specifically, we discuss how the combination of results from the three lines of work referred to above can be used as ground for the organisation of higher quality programmes to augment the capabilities and effectiveness of governmental systems through information and communications technology, a trend that has been explored in many nations and that has been coined Electronic Government. Electronic Government programmes that improve the capabilities of citizens to interact with each other and with governments, as well as the capabilities of governments to listen to the needs and aspirations of citizens, have the potential to contribute to the construction of more democratic states. Electronic Government systems that rely on ready made models to prescribe to citizens how best they should interact with each other and with the public administration are, however, by construction non-democratic. Hence, it can be a moral and ethical matter for governments to choose which line of technological development they take.     

Now or Never: Perceptions of Uniqueness Induce Acceptance of Price Increases for Experiences More Than for Objects

Seven studies test and support the prediction that consumers are more willing to accept a price increase for an experiential versus a material purchase; an effect explained by the greater uniqueness of experiences. Critically, the uniqueness model advanced here is found to be independent of the happiness consumers derive from the purchase. To gain a deeper understanding of the uniqueness mechanism, this investigation then advances and tests a four‐facet framework of uniqueness (unique opportunity, unique purchase, unique identity, and counterconformity). Together, the findings converge on the conclusion that consumers perceive the opportunity to have a particular experience (vs. object) as more unique, and this unique opportunity increases their willingness to accept a price increase. Overall, this work extends the experiential versus material purchases literature into a new domain—that of pricing; identifies the dimension—uniqueness—and its precise facet responsible for the effect—unique opportunity; and demonstrates that this model unfolds in a pattern distinct from the oft researched model centered on consumer happiness. Theoretical and practical implications are discussed.     

Psychophysical test for the independence of perception and action

Research has suggested that perception and action are independent (see M. A. Goodale & A. Haffenden, 1998). The authors used the Ebbinghaus illusion to test this hypothesis in 2 experiments. Verbal reports of perceived size were compared with maximum grip aperture during grasping (Experiment 1) and manual reports of perceived size (Experiment 2). A multidimensional signal detection analysis was used to distinguish among the possible interactions between the two processes in each experiment (H. Kadlec & J. T. Townsend, 1992a, 1992b). In Experiment 1, the percepts were independent, and there were no interactions between processes for verbal and visuomotor responses. In Experiment 2, the percepts associated with verbal and manual reports were independent, but the processes interacted at the levels of the stimulus information and the decision rules used to transform each percept into a response.     

Religiosity and Adolescent Substance Use in Central Mexico: Exploring the Influence of Internal and External Religiosity on Cigarette and Alcohol Use

This study explores the multidimensional nature of religiosity on substance use among adolescents living in central Mexico. From a social capital perspective, this article investigates how external church attendance and internal religious importance interact to create differential pathways for adolescents, and how these pathways exert both risk and protective influences on Mexican youth. The data come from 506 self-identified Roman Catholic youth (ages 14–17) living in a semi-rural area in the central state of Guanajuato, Mexico, and attending alternative secondary schools. Findings indicate that adolescents who have higher church attendance coupled with higher religious importance have lower odds of using alcohol, while cigarette use is lower among adolescents who have lower church attendance and lower religious importance. Adolescents are most at risk using alcohol and cigarettes when church attendance is higher but religious importance is lower. In conclusion, incongruence between internal religious beliefs and external church attendance places Mexican youth at greater risk of alcohol and cigarette use. This study not only contributes to understandings of the impact of religiosity on substance use in Mexico, but highlights the importance of understanding religiosity as a multidimensional phenomenon which can lead to differential substance use patterns.     

Systematic review of instruments measuring homophobia and related constructs

Since its conceptualization, the construct of homophobia has been the subject of many speculations about its specificity, reach, and possibility of empirical assessment. Several instruments have been created aiming to measure the prejudice against homosexuals. Peer‐reviewed articles of studies using measures to assess homophobia and related constructs were systematically reviewed in 4 databases (Medline, PsycINFO, ERIC, JSTOR). The articles were classified as they displayed evidence of the instrument's validity, reliability, or both. Finally, the instruments were rated according to that evidence. Out of 1076 results, 115 studies between 1993 and 2010 were identified as relevant. Those studies used 47 different instruments. This review focused in 5 instruments that concentrated the majority of the citations. Psychometric properties were acceptable.     

Larger plantar flexion torque variability implies less stable balance in the young: An association affected by knee position

The present study examined the association between plantar flexion torque variability during isolated isometric contractions and during quiet bipedal standing. For plantar flexion torque measurements in quiet stance (QS), subjects stood still over a force plate. The mean plantar flexion torque level exerted by each subject in QS (divided by 2 to give the torque due to a single leg) served as the target torque level for right leg force-matching tasks in extended knee (KE) and flexed knee (KF) conditions. Muscle activation levels (EMG amplitudes) of the triceps surae and mean, standard deviation and coefficient of variation of plantar flexion torque were computed from signals acquired during periods with and without visual feedback. No significant correlations were found between EMG amplitudes and torque variability, regardless of the condition and muscle being analyzed. A significant correlation was found between torque variability in QS and KE, whereas no significant correlation was found between torque variability in QS and KF, regardless of vision availability. Therefore, torque variability measured in a controlled extended knee plantar flexion contraction is a predictor of torque variability in the anterior-posterior direction when the subjects are in quiet standing. In other words, larger plantar flexion torque variability in KE (but not in KF) implies less stable balance. The mechanisms underlying the findings above are probably associated with the similar proprioceptive feedback from the triceps surae in QS and KE and poorer proprioceptive feedback from the triceps surae in KF due to the slackening of the gastrocnemii. An additional putative mechanism includes the different torque contributions of each component of the triceps surae in the two knee angles. From a clinical and research standpoint, it would be advantageous to be able to estimate changes in balance ability by means of simple measurements of torque variability in a force matching task.     

Homophobia or sexism? A systematic review of prejudice against nonheterosexual orientation in Brazil

Since it was coined in the 1970s, in the United States, the term “homophobia” has been invoked to define the prejudice against nonheterosexual orientation. Besides the US, the phenomenon has been detected in many contemporary societies, including Brazil. Prejudice against nonheterosexual orientation is strongly associated with the historical and social contexts in which it is embedded, which means that the term should not be used without a clear definition of its local specificities. This applies to the recent debate around homophobia in the Brazilian context. In an attempt to identify existing studies of prejudice against nonheterosexual orientations in Brazil, a systematic review was conducted in SciELO indexes, PubMed, PsycINFO, SCOPUS, and Web of Science. The articles were collected using the keyword “homophobia” and related terms, and “Brazil”, in the languages ??of the databases. The search returned 355 articles. Of these, 247 were removed because they were duplicates. The abstracts of 109 studies published between 1973 and 2011were analyzed. Thirty‐one articles were identified as relevant. The reviewed studies indicate that prejudice against nonheterosexual orientations is an evident and widespread phenomenon that is prevalent in various populations and contexts. Nevertheless, prejudice in Brazil is not homogeneous, and particular attention is necessary to the inequality of gender relations (sexism) and prejudice against gender nonconformity, which seem to explain, if not cause, most of the prejudice against nonheterosexual orientations. Although theoretically there is a clear distinction between sexual orientation and gender expression, from the standpoint of manifestation of prejudice that distinction seems to be more tenuous.