Short answer
A biography tells someone else’s life; an autobiography presents a person’s own life account. The central distinction is the relationship between subject and author, rather than simply the events covered. 1 Ghostwriting and collaboration require a qualification: these sources do not explain how shared production affects the label.
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At a glance
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| Question | Biography | Autobiography |
|---|---|---|
| Whose life is described? | Another person’s | The account-giver’s own |
| Basic authorship relationship? | Writer differs from subject | Subject provides the self-account |
| Research framing here? | Secondary source in SCSU’s guide | Firsthand life account |
| Must it be a full-length book? | No restriction established here | SCSU also recognizes short autobiographical essays |
These contrasts follow the library guide’s definitions, not a complete publishing classification system. 1
What each thing is
Biography names an account about a life written by another person. Autobiography names self-account and, in SCSU’s cited definition, can also refer to the process or literary genre. 1 The Library of Congress places autobiographical material within folklife and creative-writing resources, including recorded reminiscences. 2
Key differences
Authorship and subject should be considered separately: whose life supplies the material, and who presents the account? Under the basic definitions, biography separates those roles; autobiography joins them. 1 Coverage is a different question. The Library of Congress describes autobiography as extending from birth to the present, but that does not establish a required length for every self-account. 2
How to tell them apart
Start by identifying the life being described, then determine whether the work presents that person’s own account or another writer’s account of them. This applies the guides’ central distinction. 1 Its limit is collaborative authorship: a name on a cover alone cannot resolve questions these sources leave unanswered.
Where they overlap
Both concern individual lives, so shared subject matter does not distinguish them. 1 Autobiography also overlaps with memoir: both guides acknowledge interchangeable usage, even while describing differences in scope. A focused personal recollection therefore need not fit neatly into a single self-writing category. 1 2
Edge cases
A hypothetical subject who supplies memories while a ghostwriter drafts the prose creates a boundary question: does authorship mean supplying the account or composing the sentences? SCSU’s definition emphasizes a self-given account, while the Library of Congress describes writing by the individual. 1 2 Neither supplies a rule for resolving that case.
Why the distinction exists
The distinction identifies the account’s relationship to its subject. In research instruction, SCSU treats biography as a secondary source because someone else writes it, while describing autobiography as firsthand. 1 That is a source-position distinction, not evidence that every self-account is accurate or every outside account unreliable.
Common misconceptions
Autobiography does not necessarily mean an account ending at death: the Library of Congress uses birth-to-present scope. 2 Nor should a first-person label settle every boundary. SCSU describes both autobiography and memoir as first-person forms and explicitly acknowledges their fuzzy distinction. 1
Examples
Hypothetical case one: a researcher writes a teacher’s life story. Because writer and subject differ, this fits the guide’s biography definition. 1 Case two: Martha L. Smith’s recorded reminiscences describe her own childhood, marriage, and family experiences. The Library of Congress lists these as autobiography recordings, illustrating self-account outside a conventional authored book. 2