| Summary: | Traditional observational research methods required an experimenter's presence in order to record videos of participants, and limited the scalability of data collection to typically less than a few hundred people in a single location. In order to make a significant leap forward in affective expression data collection and the insights based on it, our work has created and validated a novel framework for collecting and analyzing facial responses over the Internet. The first experiment using this framework enabled 3,268 trackable face videos to be collected and analyzed in under two months. Each participant viewed one or more commercials while their facial response was recorded and analyzed. Our data showed significantly different intensity and dynamics patterns of smile responses between subgroups who reported liking the commercials versus those who did not. Since this framework appeared in 2011, we have collected over three million videos of facial responses in over 75 countries using this same methodology, enabling facial analytics to become significantly more accurate and validated across five continents. Many new insights have been discovered based on crowd-sourced facial data, enabling Internet-based measurement of facial responses to become reliable and proven. We are now able to provide large-scale evidence for gender, cultural and age differences in behaviors. Today such methods are used as part of standard practice in industry for copy-testing advertisements and are increasingly used for online media evaluations, distance learning, and mobile applications.
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