Direct and indirect sources Direct sources

In broad terms, direct sources are those that provide first-hand information about events. A radio interview with a politician in which we hear what the politician has to say about the economy is first-hand. An extensive speech delivered in Parliament by the same politician is also first-hand. A book that analyses this politician's particular views about the economy is, by contrast, second-hand. In scientific disciplines, experiments are the most common direct source in other disciplines,...