# Digit Span: Studies and Evidence

You have found out how we can measure the capacity of STM using digit span experiments. In this module you will learn about two important research studies that investigated STM capacity using span measures and chunking. The studies were carried out by:

- Miller (1957)
- Simon (1974)

As you learn about these studies, you will also learn about drawing conclusions from psychological research.

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## Navigation

Basic level content | Start | Digit span measures of STM | Recency measures of STM | Test your learning
Intermediate level content |  | Research using digit span measures | Research using recency measures |
Advanced level content |  | Ecological validity and STM research | Sampling validity and STM research |