As we move towards the RDIF paradigm, we are seeing very advanced techniques for surveying how people make decisions in the grocery aisle. Some techniques are as simple as baking goods from frozen dough onsite to elicit an olfactory response, to companies like VideoMining that automates the process of face recognition by way of security cameras in the store to Path Intelligence from Britain working with MIT that plots the positions of cellular handsets as they transmit to cellular networks in order to measure a consumer’s “dwell time.”