College Composition / Unit 22 CMP 0527 short lesson, about 20 seconds
Currency
Captions available
The idea
Check when a source was created, and consider what may have changed since.
In practice
How quickly sources date depends on the field: literary criticism can stay current for decades, while research in fast-moving sciences can be outdated within a few years.
Where people slip
Older sources are not automatically useless; for a study of change over time, old data may be exactly what you need.
Your place on the trail
Every lesson rests on earlier ones and opens later ones. Tap any to jump.
Builds on
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