根据大平原印第安人分类帐艺术(PILA),“平原艺术家添加前的仪式和日常生活场景保留曲目的作品,反映了社会和文化的变化带来的生命更大领域内的预订强迫同化。”Once the Indians were in U.S. captivity, they had fewer opportunities for war honors, and artists began depicting more hunting scenes and "ceremonial" subject matter in ledger art.