The article "Writing the Memoir: From Truth to Art" explains the different between The term memoir and memoirs or autobiography. the author of the article says that "memoirs was used to describe something closer to autobiography than the essay like literary memoir." She supports her explanation of memoir and autobiography by giving examples of some very known authors works.
According to the author of this article, a memoir "requires that the reader feel spoken to." A memoir don't just throws ideas to a reader; it needs to persuade a reader to take action in the topic. The reader has to be willing to be "entertained by the story itself and interested in how you now, looking back on it, understand it." A memoir could be compared to a good personal essay because it concentrates on a theme, and explains it from the narrator view. Something that needs to be in a narrator's mind when writing a memoir is that the voice (formal or informal) depends on the situation of the event being told. If the theme is about a disastrous Hurricane, than the tone is going to be more formal. If the theme is about a successful Super Bowl, than the tone is going to be more informal.
On the other hand,an autobiography is "sometimes limited by dates but not obviously by theme." An autobiography requires the author to recall events from his/her own personal life. Autobiography is expressed by Gore Vidal as something that requires "history,research, dates, and facts double-checked." An autobiography incorporates a variety of themes. The article compares an autobiography with a travel writing. In other words, an autobiography needs to include the author's (only the author's) experiences.
The link for the site is:http://www.judithbarrington.com/writingthemem.html