A detection device generates plural attractors based on brainwave data. Subsequently, the detection device calculates a Betti number by subjecting the attractors to persistent homology transform. The detection device determines an onset of encephalopathy based on a first order component of a Betti sequence calculated based on the Betti number.
NON-TRANSITORY COMPUTER-READABLE RECORDING MEDIUM, ENCEPHALOPATHY DETERMINATION METHOD, AND INFORMATION PROCESSING APPARATUS