過去研究發現助人行為是促進自己與他人建立友好關係，使得雙方產生對彼此有歸屬感的一種策略。然而，對於嬰兒而言，由於其助人行為能力正在發展，我們很難於自然情境中得知他們是否會為尋求此歸屬感，而促發其助人行為。因此，本研究之目的為探討嬰兒的助人行為是否會受到與他人建立友好關係的歸屬感而影響。本研究藉由兩個實驗來探討。實驗一藉由觀察60位18個月大嬰兒在接受不同認知意涵的內隱圖片促發其歸屬感後，進入助人任務的助人行為表現。實驗結果發現接受在一起性質圖片的18個月大嬰兒，並未因圖片促發其助人行為來維繫其歸屬感。為排除助人任務性質可能造成的干擾因素，實驗二調整了實驗一的助人任務後，在相同條件下進行觀察嬰兒的助人行為表現。結果發現雖然在一起性質的內隱圖片仍未促發其歸屬感而引發助人行為，但若將圖片分類方式改為知覺層級，將具有成對性質的內隱圖片（在一起、背對背與基準）與接受單獨性質圖片比較後卻發現，18個月大的嬰兒在特定時間區段（0至20秒、0至30秒）中有顯著較多的助人行為。此結果說明知覺層級上的刺激能夠穩定的促發18個月大嬰兒的歸屬感，進而引發其助人行為。 / Previous studies propose that helping behaviors can be an effective strategy for establishing friendly relationship and affiliation with others. However, for eighteen-month-old infants, the ability of helping is under development. Hence, it is difficult to evaluate whether they pursuit affiliation by helping others, especially in natural conditions. In this thesis, two controlled experiments were conducted to understand whether the helping behaviors can be evoked by priming. In the first experiment, sixty eighteen-month-old infants were recruited and primed by several implicit photos to evoke their tendency of affiliation and to measure the influence of the primes. Results show that the primes do not significantly evoke the subjects to perform more helping behaviors in both conditions: primed by the photos imply together and primed by other photos (back-to-back, baseline, and alone). To exclude the possible interferences of the previous helping tasks, the second experiment undertook the same procedures and settings with the first experiment, but modified the task to clarify the needs of helping. Results reveal that the difference of priming effect is still insignificant between together and others. However, if the photos are grouped by the easier-perceivable meaning: representing photos having two objects as together, and representing photos having only one object as individuality, the significance of priming can be observed. Subjects primed by together photos performed significantly more helping than those primed with individuality photos in specific periods (0-20s and 0-30s). Based on these findings, this study suggests that the perceptual stimulus can stably evoke affiliation of eighteen-month-old infants, and influence the tendency of helping others.