Abstract Sexual prejudice against bisexuals is widespread in society. However, little research has been done on this phenomenon because it is difficult to measure. The aim of the current study was to validate a short version of the Biphobia Scale for the Brazilian context (EPSB-br). In the first study, the EPSB-br showed unifactorial structure and convergent validity with scales measuring beliefs and stereotypes about bisexuality. Study 2 showed the EPSB-br’s convergent-discriminant validity with scales measuring religiosity, right-wing authoritarianism, social dominance orientation, and sleepiness. Finally, Study 3 demonstrated the criterion-related validity of the EPSB-br through an experimental manipulation in which participants watched a video of a pretend teacher and assigned a salary to it. Taken together, these results showed evidence of validity and reliability of the EPSB-br, which introduced a measure of prejudice against bisexual people in Brazil.

Resumen Lo Prejuicio Sexual contra Bisexuales está muy presente en la sociedad. Sin embargo, es un fenómeno poco estudiado, dada la dificultad de medirlo. Este trabajo buscó validar una versión reducida de la Biphobia Scale para el contexto brasileño. En el primer estudio, la EPSB-br presentó una estructura unifactorial y validez convergente con escalas que miden creencias y estereotipos sobre la bisexualidad. El estudio 2 evidenció la validez concurrente-discriminante de la EPSB-br con escalas de religiosidad, autoritarismo de derecha, orientación al dominio social y somnolencia. Finalmente, el Estudio 3 demostró la validez de criterio de la EPSB-br a través de una manipulación experimental, donde los participantes vieron un video sobre un maestro y le asignaron un salario. La síntesis de los resultados mostró evidencia de validez y confiabilidad de la EPSB-br, introduciendo una medida de prejuicio contra las personas bisexuales en Brasil.

Resumo O preconceito sexual contra bissexuais é fortemente presente na sociedade. Entretanto, este fenômeno ainda é pouco estudado, dada a dificuldade em sua mensuração. O presente trabalho teve o objetivo de validar uma versão reduzida da Biphobia Scale para o contexto brasileiro. No primeiro estudo, a Escala de Preconceito Sexual contra Bissexuais (EPSB-br) apresentou uma estrutura unifatorial e uma validade convergente com escalas que mensuram crenças e estereótipos sobre a bissexualidade. O Estudo 2 evidenciou a validade concorrente-discriminante da EPSB-br com a religiosidade, escalas de autoritarismo de direita, orientação à dominância social e sonolência. Por fim, o Estudo 3 demonstrou a validade de critério da EPSB-br a partir de uma manipulação experimental, na qual os participantes assistiram a um vídeo sobre um professor e atribuíram-lhe um salário. A síntese dos resultados mostrou evidências de validade e confiabilidade da EPSB-br, introduzindo uma medida de preconceito contra pessoas bissexuais no Brasil.

OBJECTIVE: The aim of this study was to measure dynamic lung hyperinflation and its influence on dyspnea perception in moderate and severe chronic obstructive pulmonary disease patients after performing activities of daily living. METHODS: We measured inspiratory capacity, sensation of dyspnea, peripheral oxygen saturation, heart rate and respiratory rate in 19 chronic obstructive pulmonary disease patients. These measurements were taken at rest and after performing activities of daily living (e.g., going up and down a set of stairs, going up and down a ramp and sweeping and mopping a room). RESULT: The inspiratory capacity of patients at rest was significantly decreased compared to the capacity of patients after performing activities. The change in inspiratory capacity was -0.67 L after going up and down a ramp, -0.46 L after sweeping and mopping a room, and -0.55 L after climbing up and down a set of stairs. Dyspnea perception increased significantly between rest, sweeping and mopping, and going up and down a set of stairs. Dyspnea perception correlated positively with inspiratory capacity variation (r = 0.85) and respiratory rate (r = 0.37) and negatively with peripheral oxygen saturation (r = -0.28). CONCLUSION: Chronic obstructive pulmonary disease patients exhibited reductions in inspiratory capacity and increases in dyspnea perception during commonly performed activities of daily living, which may limit physical performance in these patients.

OBJETIVO: Estudar a substância branca de pacientes com esclerose múltipla (EM) através de imagens de ressonância magnética (RM) por tensor de difusão (DTI). MÉTODO: Foram avaliados 40 pacientes com diagnóstico clínico-laboratorial de EM remitente-recorrente e quarenta controles pareados por idade e sexo, os quais foram submetidos à RM convencional e funcional (DTI). As seqüências de DTI resultaram em mapas de anisotropia fracionada (FA) e as regiões de interesse foram posicionadas nas placas, regiões peri-placas, substância branca aparentemente normal (SBAN) ao redor das placas, substância branca normal contra-lateral (SBNC) e substância branca normal do grupo controle (SBC). Os valores de FA foram comparados e a análise estatística foi realizada utilizando o teste Mann-Whitney U. RESULTADOS: A média de FA nas placas foi 0,268, nas regiões peri-placas 0,365, na SBAN 0,509, na SBNC 0,552 e na SBC 0,573. Foram observadas diferenças estatisticamente significativas nos valores de FA nas placas, regiões peri-placas e na SBAN ao redor das placas quando comparados com a SBC. Não houve diferença entre os valores de FA na SBNC dos pacientes com EM e na SBC. CONCLUSÃO: Pacientes com EM demonstram diferença nos valores de FA nas placas, peri-placas e SBAN ao redor das placas quando comparados com a SBC. Assim, o DTI pode ser considerado mais eficiente do que as seqüências de ressonância magnética convencional no estudo dos pacientes com EM.

OBJECTIVE: To study the white matter of patients with multiple sclerosis (MS) with diffusion tensor magnetic resonance (MR) imaging (DTI). METHOD: Forty patients with clinical-laboratorial diagnosis of relapsing-remitting MS and 40 age- and sex-matched controls, who underwent conventional and functional (DTI) MR imaging, were included in the study. The DTI sequences resulted in maps of fractional anisotropy (FA) and regions of interest were placed on the plaques, peri-plaque regions, normal-appearing white matter (NAWM) around the plaques, contralateral normal white matter (CNWM) and normal white matter of the controls (WMC). The FA values were compared and the statistical treatment was performed with the Mann-Whitney U test. RESULTS: The mean FA in plaques was 0.268, in peri-plaque regions 0.365, in NAWM 0.509, in CNWM 0.552 and in WMC 0.573. Statistical significant differences in FA values were observed in plaques, peri-plaque regions and in NAWM around the plaques when compared to the white matter in the control group. There was no significant difference between the FA values of the CNWM of patients with MS and normal white matter of controls. CONCLUSION: Patients with MS show difference in the FA values of the plaques, peri-plaques and NAWM around the plaques when compared to the normal white matter of controls. As a result, DTI may be considered more efficient than conventional MR imaging for the study of patients with MS.