A research study can have many appendices or it can have none. When addressing this section, look at the need for the data in the first place. Did the author place information here just to take up space? Is the information confusing and difficult to understand? Was it addressed in he paper or just included arbitrarily? Does it provide information that helps the reader understand the methods or results of the study? And finally, does it provide assistance in analyzing the study as a whole and the need for replication or further research?