PROBLEM TO BE SOLVED: To provide a method and an apparatus for predicting decision making of a human which give no physical/mental stress on a subject while suppressing an introduction cost and a maintenance cost.SOLUTION: The method is used for constructing a prediction model for predicting a human action by measuring brain activity information of a specific area and by using the measured brain activity information. The specific area is one of an auxiliary part B1 which has a vertical width of 10% from the bottom to 20% from the top of the distance between Nz and Cz when the direction from Fpz to Cz according to the ten-twenty electrode system of International Federation is set as the upper side and a horizontal width of almost 4% each of the distance between T3 and T4 from Fpz in the directions of T3 and T4, an auxiliary part B2 which has a vertical width of 10% of the distance between Nz and Cz from the bottom when the direction from Fpz to Cz is set as the upper side and a horizontal width of 10% each of the distance between T3 and T4 from Fpz in the directions of T3 and T4, and an auxiliary part C which has a vertical width of 20% of the distance between the Nz and Cz in the direction from Fpz to Cz and a horizontal width of 20% to almost 28% of the distance between T3 and T4 in the direction from Fpz to T3.COPYRIGHT: (C)2010,JPO&INPIT【課題】人間の意思決定の予測を導入コストや維持コストを抑えつつ行い、被験者に肉体的・精神的なストレスを与えることのない方法及び装置を提供すること。【解決手段】特定部位の脳活動情報を測定し、この測定した脳活動情報から人間の行動を予測する予測モデルを構築する方法であって、特定部位を、国際10-20法におけるFpzからCz方向を上としてNz・Cz間の下10%から上20%までの縦軸幅と、FpzからT3及びT4方向にそれぞれT3・T4間の略4%ずつの横軸幅とからなる補助部位B1、FpzからCz方向を上としてNz・Cz間の下10%の縦軸幅と、FpzからT3及びT4方向にそれぞれT3・T4間の10%の横軸幅とからなる補助部位B2、又はFpzからCz方向にNz・Cz間の20%の縦軸幅と、FpzからT3方向にT3・T4間の20%から略28%までの横軸幅とからなる補助部位C、のいずれかとすることを特徴とする。【選択図】図1