Every day we constantly identify, discriminate and evaluate other people's emotions. In other words, we make decisions about which emotions we perceive. Although it may seem a split-second phenomenon, deliberating over which emotions we perceive in others unfolds across several stages of processing. Our brain extracts sensory information about others, decodes this information and later interprets it. This process is referred to as perceptual decision-making. My thesis investigates the neural correlates of some of the perceptual decisions we make about the emotions of others. The chapter Theoretical Background introduces the two key concepts of my thesis, namely perceptual decision-making and emotion perception, with a special emphasis on vocal emotions. It then concludes by delineating the pending issues in the literature. The section Empirical Studies describes the aims of my research along with two experiments and two meta-analyses that were conducted to address long-standing questions in the literature.