An intriguing patent application by Apple to deliver mood-based advertising contains what could be read as a strong hint that the rumored iWatch will, as we’ve speculated in the past, major on sensor technology.

In addition to describing ways of assessing mood by such clues as likes in social media, type of applications used and music playing, the patent also lists physical characteristics that could be used:

Mood-associated physical characteristics can include heart rate; blood pressure; adrenaline level; perspiration rate; body temperature; vocal expression, e.g. voice level, voice pattern, voice stress, etc.; movement characteristics; facial expression; etc …  expand full story