# Performance Metrics

**In this section:**

* [Overview](https://emotiv.gitbook.io/emotivbci/performance-metrics/overview)
* [Definitions](https://emotiv.gitbook.io/emotivbci/performance-metrics/definitions)
* [Frequency rate](https://emotiv.gitbook.io/emotivbci/performance-metrics/frequency-rate)
* [Turn streams on/off](https://emotiv.gitbook.io/emotivbci/performance-metrics/turn-streams-onoff)
* [Toggle all streams on/off](https://emotiv.gitbook.io/emotivbci/performance-metrics/toggle-all-streams-onoff)