A report titled Promoting Grit, Tenacity, and Perseverance, now has the US Department of Education under pressure. See page labeled 44 (the 62nd page within the pdf document) that details devices used in capture emotional data during student testing. National concern has prompted the US Department of Education to remove this report from their website. Below is a small excerpt of what is described in this report:
Sensors provide constant, parallel streams of data and are used with data mining techniques and self-report measures to examine frustration, motivation/flow, confidence, boredom, and fatigue. The MIT Media Lab Mood Meter is a device that can be used to detect emotion (smiles) among groups.