1,721,000 research outputs found

    Going Beyond Counting First Authors in Author Co-citation Analysis

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    The present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed

    Variations on the Author

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    “Variations on the Author” discusses two of Eduardo Coutinho’s recent films (Um Dia na Vida, from 2010, and Últimas Conversas, posthumously released in 2015) and their contribution to the general question of documentary authorship. The director’s filmography is characterized by a consistent yet self-effacing form of authorial self-inscription: Coutinho often features as an interviewer that rather than express opinions propels discourses; an interviewer that is good at listening. This mode of self-inscription characterizes him as an author who is not expressive but who is nonetheless markedly present on the screen. In Um Dia na Vida, however, Coutinho is completely absent form the image, while Últimas Conversas, on the contrary, includes a confessional prologue that moves the director from the margins to the center of his films. This article examines the ways in which these works stand out in the filmography of a director who offers new insights into the notion of cinematic authorship

    Appropriate Similarity Measures for Author Cocitation Analysis

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    We provide a number of new insights into the methodological discussion about author cocitation analysis. We first argue that the use of the Pearson correlation for measuring the similarity between authors’ cocitation profiles is not very satisfactory. We then discuss what kind of similarity measures may be used as an alternative to the Pearson correlation. We consider three similarity measures in particular. One is the well-known cosine. The other two similarity measures have not been used before in the bibliometric literature. Finally, we show by means of an example that our findings have a high practical relevance.information science;Pearson correlation;cosine;similarity measure;author cocitation analysis

    Assessment of skin maturity by LED light at birth and its association with lung maturity: clinical trial secondary outcomes

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    Background: clinicians face barriers when assessing lung maturity at birth due to global inequalities. Still, strategies for testing based solely on gestational age to predict the likelihood of respiratory distress syndrome (RDS) do not offer a comprehensive approach to addressing the challenge of uncertain outcomes. We hypothesize that a noninvasive assessment of skin maturity may indicate lung maturity.Objective: this study aimed to assess the association between a newborn’s skin maturity and RDS occurrence.Methods: we conducted a case-control nested in a prospective cohort study, a secondary endpoint of a multicenter clinical trial. The study was carried out in 5 Brazilian urban reference centers for highly complex perinatal care. Of 781 newborns from the cohort study, 640 were selected for the case-control analysis. Newborns with RDS formed the case group and newborns without RDS were the controls. All newborns with other diseases exhibiting respiratory manifestations were excluded. Skin maturity was assessed from the newborn's skin over the sole by an optical device that acquired a reflection signal through an LED sensor. The device, previously validated, measured and recorded skin reflectance. Clinical data related to respiratory outcomes were gathered from medical records during the 72-hour follow-up of the newborn, or until discharge or death, whichever occurred first. The main outcome measure was the association between skin reflectance and RDS using univariate and multivariate binary logistic regression. Additionally, we assessed the connection between skin reflectance and factors such as neonatal intensive care unit (NICU) admission and the need for ventilatory support.Results: out of 604 newborns, 470 (73.4%) were from the RDS group and 170 (26.6%) were from the control group. According to comparisons between the groups, newborns with RDS had a younger gestational age (31.6 vs 39.1 weeks, P&lt;.001) and birth weight (1491 vs 3121 grams, P&lt;.001) than controls. Skin reflectance was associated with RDS (odds ratio [OR] 0.982, 95% CI 0.979-0.985, R2=0.632, P&lt;.001). This relationship remained significant when adjusted by the cofactors antenatal corticosteroid and birth weight (OR 0.994, 95% CI 0.990-0.998, R2=0.843, P&lt;.001). Secondary outcomes also showed differences in skin reflectance. The mean difference was 0.219 (95% CI 0.200-0.238) between newborns that required ventilatory support versus those that did not and 0.223 (95% CI 0.205-0.241) between newborns that required NICU admission versus those that did not. Skin reflectance was associated with ventilatory support (OR 0.996, 95% CI 0.992-0.999, R2=0.814, P=.01) and with NICU admission (OR 0.994, 95% CI 0.990-0.998, R2=0.867, P=.004).Conclusions: our findings present a potential marker of lung immaturity at birth using the indirect method of skin assessment. Using the RDS clinical condition and a medical device, this study demonstrated the synchrony between lung and skin maturity.Trial Registration: Registro Brasileiro de Ensaios Clínicos (ReBEC) RBR-3f5bm5; https://tinyurl.com/9fb7zrdbInternational Registered Report Identifier (IRRID): RR2-10.1136/bmjopen-2018-027442<br/

    Emotional Quotient Inventory Short Form: proprietà psicometriche della versione italiana

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    Introduzione: L’intelligenza emotiva (IE) è la capacità di percepire, regolare e valutare le emozioni, al fine di promuovere la crescita emotiva (Salovey e Mayer, 1997). Le critiche sono mirate all’ambiguità nella definizione del costrutto: alcune teorie inscrivono l’IE all’interno dell’area di personalità, altre dell’intelligenza psicometrica, rendendo i contorni sempre più vaghi ed indefiniti (Locke, 2005). Ulteriori critiche riguardano la misura dell’IE: gli strumenti possiedono scarsa validità di costrutto e risultano facilmente falsificabili (Barrett, 2001). L’Emotional Quotient Inventory (EQi; Bar-On, 1997), sebbene sia uno degli strumenti più usati nella ricerca, include un numero di dimensioni ampio e non sempre legate alla definizione di IE. Inoltre, gli studi in letteratura sull’attendibilità dell’EQ-i sono scarsi (Matthews, 2002). A partire da queste critiche, lo studio si propone di elaborare una versione breve dell’EQ-i ed indagare i nessi con la personalità e l’intelligenza fluida, al fine di chiarire il costrutto di IE. Metodo: Ad un campione di 600 soggetti (309 Femmine; età media=28.04, DS=12.96 anni) sono stati somministrati l’EQ-i, il CAT-FIT (Romanelli, 2009) ed il BFQ-2 (Caprara et al., 2007). Attraverso AFE e AFC è stata analizzata la dimensionalità dell’EQ-i e, tramite l’alpha di Cronbach, è stata analizzata l’attendibilità. I nessi tra i fattori dell’EQ-i, personalità ed intelligenza fluida sono stati studiati attraverso il coefficiente di correlazione r di Pearson. Risultati: I risultati mostrano una versione ridotta dello strumento con una struttura a cinque fattori. L’EQ-i possiede una buona attendibilità e presenta, complessivamente, correlazioni positive e significative con i cinque fattori di personalità; risulta indipendente dall’intelligenza fluida. Conclusioni: I nostri risultati porterebbero ad identificare l’IE quale costrutto afferente al dominio della personalità più che a quello dell’intelligenza psicometrica (Van Rooy, 2004)

    Assessment of skin maturity by LED light at birth and its association with lung maturity: vlinical trial decondary outcomes

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    Background: vlinicians face barriers when assessing lung maturity at birth due to global inequalities. Still, strategies for testing based solely on gestational age to predict the likelihood of respiratory distress syndrome (RDS) do not offer a comprehensive approach to addressing the challenge of uncertain outcomes. We hypothesize that a noninvasive assessment of skin maturity may indicate lung maturity.Objectives: this study aimed to assess the association between a newborn's skin maturity and RDS occurrence.Methods: we conducted a case-control nested in a prospective cohort study, a secondary endpoint of a multicenter clinical trial. The study was carried out in 5 Brazilian urban reference centers for highly complex perinatal care. Of 781 newborns from the cohort study, 640 were selected for the case-control analysis. Newborns with RDS formed the case group and newborns without RDS were the controls. All newborns with other diseases exhibiting respiratory manifestations were excluded. Skin maturity was assessed from the newborn's skin over the sole by an optical device that acquired a reflection signal through an LED sensor. The device, previously validated, measured and recorded skin reflectance. Clinical data related to respiratory outcomes were gathered from medical records during the 72-hour follow-up of the newborn, or until discharge or death, whichever occurred first. The main outcome measure was the association between skin reflectance and RDS using univariate and multivariate binary logistic regression. Additionally, we assessed the connection between skin reflectance and factors such as neonatal intensive care unit (NICU) admission and the need for ventilatory support.Results: out of 604 newborns, 470 (73.4%) were from the RDS group and 170 (26.6%) were from the control group. According to comparisons between the groups, newborns with RDS had a younger gestational age (31.6 vs 39.1 weeks, P&lt;.001) and birth weight (1491 vs 3121 grams, P&lt;.001) than controls. Skin reflectance was associated with RDS (odds ratio [OR] 0.982, 95% CI 0.979-0.985, R 2=0.632, P&lt;.001). This relationship remained significant when adjusted by the cofactors antenatal corticosteroid and birth weight (OR 0.994, 95% CI 0.990-0.998, R 2=0.843, P&lt;.001). Secondary outcomes also showed differences in skin reflectance. The mean difference was 0.219 (95% CI 0.200-0.238) between newborns that required ventilatory support versus those that did not and 0.223 (95% CI 0.205-0.241) between newborns that required NICU admission versus those that did not. Skin reflectance was associated with ventilatory support (OR 0.996, 95% CI 0.992-0.999, R 2=0.814, P=.01) and with NICU admission (OR 0.994, 95% CI 0.990-0.998, R 2=0.867, P=.004). Conclusions: our findings present a potential marker of lung immaturity at birth using the indirect method of skin assessment. Using the RDS clinical condition and a medical device, this study demonstrated the synchrony between lung and skin maturity.Trial registration: Registro Brasileiro de Ensaios Clínicos (ReBEC) RBR-3f5bm5; https://tinyurl.com/9fb7zrdb.</p

    The State-Trait Anxiety Inventory: Shadows and Lights on its Construct Validity

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    Abstract Past studies on the factor validity of the Trait subscale of the Spielberger’s State-Trait Anxiety Inventory (STAI-T) do unanimously agree on its structure. In fact, researchers are still debating whether the STAI-T is unidimensional or multidimensional. Our aim was to clarify what the STAI-T measures. The STAI-T, the Beck Depression Inventory–II, the Teate Depression Inventory, and the Beck Anxiety Inventory were administered to 1124 psychiatric outpatients and to 877 healthy subjects. A confirmatory factor analysis was performed in order to compare various models in the literature. The internal consistency and convergent and discriminant validity of the STAI-T as well as its factorial subscales were assessed. The one-construct two-method (i.e., the STAI-T measures one substantive anxiety construct plus artifacts due to negative–positive item polarity) and the bifactor (i.e., the STAI-T comprises two first-order specific factors [“Anxiety” and “Depression”] and one first-order general factor) models were the best-fitting solutions for the STAI–T in both the clinical and nonclinical samples. The STAI–T total score correlated more strongly with measures of depression than with a concurrent measure of anxiety. The STAI-T should be considered a measure of general negative affect, including specific aspects of cognitive anxiety and depression together. Keywords Confirmatory factor analysis . Psychological tests . Anxiety . Depression . Reliability and validit
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