The　temporal　characteristics　of　human　inductive　strength　judgment　process　have　not　been　previously　investigated,　although　some　preliminary　spatial　localization　results　have　been　reported.　In　the　present　study,　some　Chinese　verbal　inductive　reasoning　tasks　are　used　in　ERP　(event　related　potentials)　experiments　to　explore　the　time　course　of　inductive　strength　judgment.　The　experimental　results　confirm　our　expectation.　Inductive　strength　judgment　after　the　presentation　of　a　conclusion　mainly　contains　three　stages:　visual　encoding,　semantic　information　integration,　and　strength　evaluation.　It　can　be　tentatively　concluded　that　visual　encoding　may　be　observed　at　the　frontal　P200　and　the　posterior　N200,　and　the　frontal　LNC　and　the　posterior　LPC　may　reflect　semantic　information　integration,　and　the　slow　waves　after　about　650ms　may　relate　to　strength　evaluation　process.　©　2007　IEEE.