Umber of occurrences of each signal per bidding for focus. The exact timing of the actions was ignored because the analysis was restricted to distinguish in between extremely frequent behaviors occurring in pretty much all interactions (e.g looking at BCTC bartender in or in out of interactions) and uncommon behaviors (e.g taking a look at revenue in or in out of interactions). As a result,a statistical analysis was not essential. The frequency data in Table reflects the observable behavior of customers. But relying on observable behavior alone will not be sufficient for extracting a meaningful structure of an interaction (cf. Orkin and Roy,,nor for figuring out what specifically was meaningful to the bartenders (cf. Levinson. However the distinction between behavior that coincided having a response and behavior that was interpreted by the bartenders and triggered their response is vital. For PubMed ID: example,if customers scratched their heads regularly,this behavior would occur with a high frequency but it is just not necessarily informative,i.e head scratching and bidding for consideration coincide but this will not imply a causal connection. Thus,the all-natural information supplies a solid base for deriving hypotheses about which signals are informative but their validity must be demonstrated in experiments. By definition,the potentially needed behaviors take place in all interactions and as a result,possess a higher frequency. All clients had been directly at the bar or approached the bar. As a result,Getting directly in the bar was identified as a candidate for any necessary signal. The remaining high frequency behaviors consideration to bartender,looking at bartender and head and physique to bar are equivalent as theyindicate the person was looking at the bar. We summarize all of the contributing behaviors within a single signal and refer to it as Looking at the bar. Robot systems are usually not however capable to reliably estimate the interest concentrate and gaze path (without the need of calibrating an eye tracker). Nevertheless,the head and physique orientation could be estimated and provide a dependable indication of where a person is searching. As a result,Looking at the bar (approximated by head and body direction) is yet another candidate for vital signals. The important signals are informative towards the policy as their absence enables concluding that the customer is not bidding for focus. But for safely concluding that a client is bidding for interest,the sufficient set of signals is required. The data in Table suggests that prospects successfully attracted the consideration of your bartender by only being directly in the bar and taking a look at the bar whereas other behaviors were optional for initiating an interaction. As a result,we hypothesized that this set of two signals is sufficient. In sum,the organic data collection recommended that the set of signals formed by becoming directly at the bar and taking a look at the bar (approximated by head and body direction) is vital and sufficient.Table Summary of consumer behavior when bidding for attention. Behavior Number of interactions FrequencyCUSTOMER Physique POSTURE AND POSITION Physique to bar Head to bar Becoming straight at bar Approaching bar Leaning on bar Turning to bar Additional away from bar Looking at bartender Head gesture Taking a look at cash Taking a look at assortment Looking at menu Mimic Raising eyebrows Smiling Interest to bartender Attention to human Attention to object Holding objectbottle Hand gesture to other folks Hand gesture to bartender Consumer SPEECH Speaking to bartender Speaking to others Client HEAD AND Searching DIRECTIONCUSTOMER Focus FOCUSCUST.