A common assumption is that there are types of learners who prefer certain channels of perception, i.e. people who prefer to read texts, other people who prefer to listen to or watch a lecture. It is assumed that people prefer a certain perception channel, but there is no convincing evidence for this assumption. The preference of a perception channel as a personality trait (“learning type“) is namely not recognizable, because there is only the situational preference of a certain media offer, i.e., in some situations one prefers to read a text, in other situations one prefers to listen to a lecture. The situation is different with learning styles that relate to the use of learning materials, because here there is evidence of enduring preferences, along the two dimensions of concrete experience versus abstract concepts, or active intervention versus reflective observation.