Abstract: A method includes providing digital content to a content designer through a device and receiving an input from the content designer through the device indicating a desire to tag an event in the digital content. A user interface is then provided to receive a predicted biometric response from the content designer, the predicted biometric response comprising a biometric response that is expected to be observed in end users when the end users experience the event. An identifier for the event and the predicted biometric response is then stored so that it is associated with the digital content.

Abstract: A system includes a brain activity sensor sensing electrical activity of a students' brain and a device that receives messages from the brain activity sensor while the student is receiving instructions with a first value for an attribute of instruction and that determines a first attention level from the received messages. The device receives additional messages from the brain activity sensor while the student is receiving instructions with a second value for the attribute of instruction and determines a second attention level from the additional received messages. The device then determines an attention variability for the attribute of instruction based on a change in attention level from the first attention level to the second attention level.