The result also indicated a marginally significant tendency of decline in accuracy as the stimulus increased, \documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$r=-0.06
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eldBETA: A Large Eldercare-oriented Benchmark Database of SSVEP-BCI for the Aging Population.
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