Perception is the set of processes by means of which we recognize, organize and give meaning to the sensations that we receive from environmental stimulation (Goodale, 2000). It is the capacity to receive, through the senses, the images, impressions or external sensations, that allow us to know and comprehend something. These processes are both conscious and unconscious. Priming is one of the most frequently used experimental paradigms to study unconscious perception. This paradigm has been employed with different goals in numerous investigations in basic psychology. It consists in the presentation of a stimulus that facilitates the subsequent processing of another stimulus with which it has some type of relationship (phonological, semantic, etc.). Among other things, this paradigm allows to show the presence of unconscious perception. Here, you will be able to do semantic and phonological priming tasks.