The purpose of affective computing is to enable computers to perceive

understand and express emotionsAffect data acquisition and affect measure are essential to the research of affective computingTo explore the problem of affect coding

experiments were elaborately performed in the scenario of FIFA football electronic gameFirstly natural affect of game players were elicited in the game environmentThen a scheme of affect coding based on emotion prototypes was proposed

and both categorical emotions and levels within the affective space were assessed by game players as well as third-party observersFinally an analysis was performed on the inter-observer agreementThe experiment data showed that valid and consistent affect coding results can be attained with the proposed method