Affect can significantly influence education/learning. Thus, understanding a learner's affect throughout the learning process is crucial for understanding motivation. In conventional education/learning research, learner motivation can be known through postevent self-reported questionnaires. With the advance of affective computing technology, researchers are able to objectively identify and measure a learner's affective status during the entire learning process in a real-time manner, and then they are able to understand the interrelationship between emotion, motivation and learning performance. There are over 100 papers in the ScienceDirect database with the keywords "affective computing in education" or "affective computing in learning," which reveals that this emerging technology has been applied to education/learning. This study intends to categorize and summarize those measurements so as to realize their applicability, feasibility and trends. Finally, some challenges and suggestions are then raised for helping educational researchers when applying affective computing technology.The need for AC in learning/education Since AC was proposed by Picard in 1994, there has been a burst of research focused on creating technologies to monitor and appropriately respond to affective states (Picard, 1997a). Through Advancements and trends of affective computing research 1305 V C 2015 British Educational Research AssociationTwo researchers with AC experience were asked to use the key phrases "affective computing in education" and "affective computing in learning" to obtain relevant studies from the SDOS Advancements and trends of affective computing research 3 Advancements and trends of affective computing research 1311 V C 2015 British Educational Research Association 4 AC, affective computing; EEG, electroencephalography; EMG, electromyography; SCR, skin conductance response. Advancements and trends of affective computing research 9 Advancements and trends of affective computing research 1313 V C 2015 British Educational Research Association Advancements and trends of affective computing research 1319 V C 2015 British Educational Research Association Advancements and trends of affective computing research 17 Advancements and trends of affective computing research 1321 V C 2015 British Educational Research Association https://en.wikipedia.org/wiki /Electrodermal_activity Advancements and trends of affective computing research 19
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