While hundreds of plays have been attributed to Plautus' name, the canon consists of 20 surviving plays. To be able to use a more diverse set of characters, he developed what is called a "stock character". He sometimes used typical situations where these characters could be used as well. He always used the same kinds of stock characters, especially if he could amuse the audience. As Walter Juniper wrote, “Everything, including artistic characterization and consistency of characterization, were sacrificed to humor, and character portrayal remained only where it was necessary for the success of the plot and humor to have a "persona" who stayed in character, and where the "persona" by his portrayal contributed to humor.”