代幣制度與虧損反應係兩項常用的幼兒行為改變技術。本文旨在透過對代幣制度與虧損反應的內涵及策略之探討，進一步闡釋二者於特殊幼兒行為輔導上之應用。 經探討結果發現： 代幣制度運用次級增強與後效強化的原理，具有形塑預期行為的目的、實施結構化行為改變歷程的程序等內涵，及連結刺激反應與類化相關行為等策略。虧損反應依據制約反應原理，包括消弱徒勞行為的目的、實施撤除增強物基準的程序等內涵，以及摘記與追蹤輔導標的行為等策略。 二者在特殊幼兒行為輔導上，具有適用對象、適性行為、與適當時機等方面之應用。

　　　　　Token System and Deficit Respond are utilities on behavior modification of special preschoolers' guidance. This research is purposed to investigate their contents, strategies, and practice application. As results found that Token System based on contingent reinforcement theory, has contents of shapping behavior and strategies of connection stimulus-response. Deficit Respond based on condition learning theory, has contents of fading reinforcement and strategies of behavior of follow-up. Both of Token System and Deficit Respond are applied on appropriate target, behavior and period of special preschoolers.