# Introduction

This package will help you learn about psychological research into the capacity of short term memory (STM). You will find out about some theoretical ideas about STM, some related research studies, and the strengths and weaknesses of the research. At the end, you can take a test to check your learning.

There is quite a lot of material available in this package. However, you don't have to study all of it. The material is divided into three levels:

Level | What it involves
--- | ---
Basic | Understanding psychological concepts and research methods, and being able to explain general psychological principles
Intermediate | Interpreting psychological data and applying experimental results to psychological theories
Advanced | Assessing the strengths and weaknesses of psychological theories, studies and research methods

You can choose which level to study at, and in the final test, you will only be assessed on what you have covered.

Next Section

## 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 |