Workload assessment: cross-cultural adaptation, content validity and instrument reliability.

OBJECTIVES: to adapt, validate the content and assess the reliability of the instrument National Aeronautics and Space Administration - Task Load Index, translated into Brazilian Portuguese. METHODS: a methodological study, divided into five steps: translation; synthesis; back-translation; assessment of the Portuguese version by an expert committee; pre-test and content validity of the final version by health professionals working in inpatient units. The Content Validity Index (CVI) (minimum 0.80) and Cronbach's alpha (minimum 0.70) were calculated. RESULTS: in the first round, in the agreement analysis of the translated version, three items did not reach the minimum CVI value. It was decided to remove the statement. The instrument title and items "performance" and "effort" were changed. There was consensus and approval of the final version in the pre-test step. CONCLUSIONS: the NASA Task Load Index instrument, adapted to Brazilian Portuguese, presents reliability and content validity evidence.

Workload assessment: cross-cultural adaptation, content validity and instrument reliability / Evaluación de la carga de trabajo: adaptación transcultural, validez de contenido y confiabilidad del instrumento / Avaliação da carga de trabalho: adaptação transcultural, validade de conteúdo e confiabilidade de instrumento

ABSTRACT Objectives: to adapt, validate the content and assess the reliability of the instrument National Aeronautics and Space Administration - Task Load Index, translated into Brazilian Portuguese. Methods: a methodological study, divided into five steps: translation; synthesis; back-translation; assessment of the Portuguese version by an expert committee; pre-test and content validity of the final version by health professionals working in inpatient units. The Content Validity Index (CVI) (minimum 0.80) and Cronbach's alpha (minimum 0.70) were calculated. Results: in the first round, in the agreement analysis of the translated version, three items did not reach the minimum CVI value. It was decided to remove the statement. The instrument title and items "performance" and "effort" were changed. There was consensus and approval of the final version in the pre-test step. Conclusions: the NASA Task Load Index instrument, adapted to Brazilian Portuguese, presents reliability and content validity evidence.

RESUMEN Objetivos: adaptar, validar el contenido y evaluar la confiabilidad del instrumento National Aeronautics and Space Administration - Task Load Index , traducido al portugués brasileño. Métodos: estudio metodológico, dividido en cinco etapas: traducción; síntesis; traducción inversa; evaluación de la versión portuguesa por un comité de expertos; pretest y validación de contenido de la versión final por profesionales de la salud que actúan en unidades de hospitalización. Se calculó el Índice de Validez de Contenido (IVC) (mínimo 0,80) y el alfa de Cronbach (mínimo 0,70). Resultados: en la primera ronda, en el análisis de concordancia de la versión traducida, tres ítems no alcanzaron el valor mínimo de IVC. Se decidió eliminar la declaración. Se modificó el título del instrumento y los ítems "desempeño" y "esfuerzo". Hubo consenso y aprobación de la versión final en la etapa de pre-prueba. Conclusiones: el instrumento NASA Task Load Index , adaptado al portugués brasileño, presenta evidencias de confiabilidad y validez de contenido.

RESUMO Objetivos: adaptar, validar o conteúdo e avaliar a confiabilidade do instrumento National Aeronautics and Space Administration - Task Load Index , traduzido para o português brasileiro. Métodos: estudo metodológico, dividido em cinco etapas: tradução; síntese; retrotradução; avaliação da versão em português por comitê de especialistas; pré-teste e validação de conteúdo da versão final por profissionais de saúde atuantes em unidades de internação. Foram calculados o Índice de Validade de Conteúdo (IVC) (mínimo 0,80) e o alfa de Cronbach (mínimo 0,70). Resultados: na primeira rodada, na análise de concordância da versão traduzida, três itens não alcançaram o valor mínimo do IVC. Optou-se pela remoção do enunciado. O título do instrumento e os itens "desempenho" e "esforço" foram alterados. Houve consenso e aprovação da versão final na etapa de pré-teste. Conclusões: o instrumento Índice NASA de carga de tarefa, adaptado para o português brasileiro, apresenta evidências de confiabilidade e validade de conteúdo.

Identification and Characterization of Short-Term Motor Patterns in Rest Tremor of Individuals with Parkinson's Disease.

(1) Background: The dynamics of hand tremors involve nonrandom and short-term motor patterns (STMPs). This study aimed to (i) identify STMPs in Parkinson's disease (PD) and physiological resting tremor and (ii) characterize STMPs by amplitude, persistence, and regularity. (2) Methods: This study included healthy (N = 12, 60.1 ± 5.9 years old) and PD (N = 14, 65 ± 11.54 years old) participants. The signals were collected using a triaxial gyroscope on the dorsal side of the hand during a resting condition. Data were preprocessed and seven features were extracted from each 1 s window with 50% overlap. The STMPs were identified using the clustering technique k-means applied to the data in the two-dimensional space given by t-Distributed Stochastic Neighbor Embedding (t-SNE). The frequency, transition probability, and duration of the STMPs for each group were assessed. All STMP features were averaged across groups. (3) Results: Three STMPs were identified in tremor signals (p < 0.05). STMP 1 was prevalent in the healthy control (HC) subjects, STMP 2 in both groups, and STMP3 in PD. Only the coefficient of variation and complexity differed significantly between groups. (4) Conclusion: These results can help professionals characterize and evaluate tremor severity and treatment efficacy.