I first came across the concept of "attentional" gambling while I was researching an article on change blindness, a phenomenon where we fail to notice even fairly obvious changes between images if they are separated briefly by a blank field. (That is, in precisely the situation where we would most like the opposite to be truesuch as when reloading a Web page with feedback or changes.)  Attentional gambling aptly describes the investment we make each time we decide where and how long to focus our attention on a particular part of a page. In the case of change…
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