It may sound very simple, but recording video and playing it back enables more detailed analysis of facial expressions.
Observational research is becoming more and more popular in consumer science and market research. From on-site behavioral observations in supermarkets to advanced multimodal lab studies.
Knowledge is the key to developing a better understanding of autism. Researchers often observe and code behavior in combination with other research methods.
For many years, questionnaires and interviews were used to assess needs, motives, and preferences of consumers. But, non-verbal responses can also provide important information.