### main.js ### setup.js change detection reactive behavior ### cohen's kappa cohen's kappa for binary classification: ```javascript TP = stefan: reaction, tom: reaction TN = stefan: detection, tom: detection FP = stefan: detection, tom: reaction FN = stefan: reaction, tom: detection k = 2 * (TP * TN - FN * FP) /J ((TP + FP) * (FP + TN)) + ((TP + FN) * (FN + TN)) ```