The problem with heatmaps like this is that they don't actually give any information to what is the cause of the changed attention. Has the attention span becom

The problem with heatmaps like this is that they don't actually give any information to what is the cause of the changed attention. Has the attention span become shorter, has the knowledge of where the better posts are and how to identify them become internal or is regular visitor to reddit simply not interested in too many stories because they know they come back in a few minutes? Only with some causal correlation between user behaviour and your site you can change your site to adapt to your users. I really would like to see more research on this.