Lab Streaming Layer (LSL)
Notes on the data
Performance Metrics
Performance Metrics can be found in the menu on the left-hand side of the EmotivPRO screen.
The Performance Metrics view displays the EMOTIV Performance Metrics algorithms.
Performance Metrics data is displayed in EmotivPRO on a scaled axis from 0 to 100. Exported data files for performance metrics contain both the scaled and unscaled versions of the data.
Please note: Performance Metrics for EPOC FLEX can only be supported when its sensors are mapped to the EPOC X sensor configuration.
Performance Metrics graphs include six metrics for Emotiv’s Insight, EPOC+, EPOC X, and EPOC Flex (only when mapped to the EPOC X configuration) headsets.
The performance metrics include:‌
  • Stress (FRU) measures how comfortable you are with a task. High stress can result from an inability to complete a difficult task, feeling overwhelmed, and fearing negative consequences for failing to satisfy the task requirements. Generally a low to moderate level of stress can improve productivity, whereas a higher level tends to be destructive and can have long term consequences for health and well-being.
  • Engagement (ENG) is experienced as alertness and the conscious direction of attention towards task-relevant stimuli. It measures the level of immersion in the moment and is a mixture of attention and concentration and contrasts with boredom. Engagement is characterized by increased physiological arousal and beta waves along with attenuated alpha waves. The greater the attention, focus, and workload, the greater the output score reported by the detection.
  • Interest (VAL) is the degree of attraction or aversion to the current stimuli, environment, or activity and is commonly referred to as Valence. Low interest scores indicate a strong aversion to the task, high interest indicates a strong affinity with the task while mid-range scores indicate you neither like nor dislike the activity.
  • Excitement (EXC) is an awareness or feeling of physiological arousal with a positive value. It is characterized by activation in the sympathetic nervous system which results in a range of physiological responses including pupil dilation, eye widening, sweat gland stimulation, heart rate and muscle tension increases, blood diversion, and digestive inhibition. In general, the greater the increase in physiological arousal the greater the output score for the detection. Excitement detection is tuned to provide output scores that reflect short-term changes in excitement over time periods as short as several seconds.
  • Focus (FOC) is a measure of fixed attention to one specific task. Focus measures the depth of attention as well as the frequency that attention switches between tasks. A high level of task switching is an indication of poor focus and distraction.
  • Relaxation (MED) is a measure of an ability to switch off and and recover from intense concentration. Trained meditators can score extremely high relaxation scores.
‌Performance metrics are supplied at 0.1Hz for data export, playback, and preview in EmotivPRO.

How to turn performance metrics on and off

To focus on a particular performance metric, you can turn ‌individual performance metrics on and off.
To select which performance metrics you want to focus on:
  1. 1.
    Click on the eye icon at the top-right-hand corner of the screen.
  2. 2.
    A pop-up box will open showing the performance metrics you can select.
  3. 3.
    Click on the performance metrics you want to see.
  4. 4.
    To close the pop-up box, click anywhere outside of the box.

How to toggle all performance metrics

The toggle feature allows you to see all or none of the performance metrics.
To use the toggle feature, you need to:
  1. 1.
    Click on the eye icon at the top-right-hand corner of the screen.
  2. 2.
    A pop-up box will open showing the performance metrics you can select
  3. 3.
    Click on the Toggle button. This will either select or unselect all performance metrics.
  4. 4.
    To close the pop-up box, click anywhere outside of the box.
Export as PDF
Copy link
Contents