Most studies on nominalization focus on nouns derived from action verbs and pay little attention to other semantic types. This article aims to fill this gap by studying a group of perception nominalizations in Spanish. It is well-known that the semantic distinctions that cross the field of perception (corresponding to the perception modalities and agentivity of the perceiver) influence the syntax of the corresponding verbs, and especially their complementing pattern. Yet, it has not yet been studied to what extent these oppositions have an impact on the argument structure of perception nominalizations. Moreover, as opposed to previous analyses, which mainly focus on theoretical assumptions of the nominalization process, this study is corpus-based and provides a quantitative as well as qualitative analysis.