Where's the control in this "experiment"? Even just a colleague at the same location checking ads without uttering these ridiculously generic test phrases. Did

Where's the control in this "experiment"? Even just a colleague at the same location checking ads without uttering these ridiculously generic test phrases. Did he ensure his logged in account wasn't used to research some points for this story, either on his laptop or phone? There's quite a few trivial ways he could have polluted his ad stream before needing to look to voice monitoring. Half of the stories on this topic seem to be merely the effect (I'm sure someone's coined a name for it) of seeing more of what you look for. e.g. Decide you are buying a Tesla and suddenly you notice there seem to be more Teslas on the roads... I'd like to see some studies and stories on this that are a significantly more credible. I am naturally suspicious but in the absence of evidence I tend to think it's not happening, yet. This piece clarifies nothing.