Research into nonhuman primates’ gestures is often limited by the lack of clear criteria to define a gesture and by studying gestures separately from other communicative means. Despite the fundamental differences between the gestural communication of humans and other primates, I argue that sign language research might benefit from the lessons learned from these drawbacks and the current developments in primate communication research.

中文翻译：

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什么是手势？比较手势研究的教训

对非人类灵长类动物手势的研究通常受到缺乏定义手势的明确标准以及将手势与其他交流方式分开研究的限制。尽管人类和其他灵长类动物的手势交流存在根本差异，但我认为手语研究可能会受益于从这些缺点中吸取的教训以及灵长类动物交​​流研究的当前发展。