# The Validity of STM Research

If you looked at how we can evaluate digit span research, you should remember that the validity of a study is all about whether the study gives useful or truthful results.

In this module, you will learn about a new concept called sampling validity and how this can be used to criticise research into STM, including studies that use the recency and digit span techniques.

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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 |