Some time ago a colleague quoted me the results of a study demonstrating that, on average, parents dropped 12 IQ points by the time their kids graduated high school. Assuming the IQ measurement used was the Weschler adult intelligence scales (WAIS), a standard deviation is 15 points. That means a change of 12 points isn't technically "significant" as far as statistical measurements go. Nonetheless, 12 points is 12 points, and it was an "average" after all. I think I've got a head start, so by the time my kiddos are high school age, my own IQ drop will probably be 15 or greater points, and thus be labeled "significant."
Yesterday morning after Dear Hubby left for work, I noticed he left his cell phone charging on the counter. I then picked up my own cell phone (we have free cell to cell minutes) and proceeded to call his cell phone to tell him that he left it at home. Ah...yeah...well you can see where I'm going with this one.