They discovered that when you go from one room into another identical one the memory loss didn't happen - possibly because there wasn't sufficient change to create a significant even boundary.

Ever walk into a room and do a mental headstand trying to remember why you're there? This frustrating memory glitch is called the doorway effect. As psychologists explain, our brain processes ...

The horrible sensation you get when you completely forget why you walked into a room has finally been explained ... But even with everything written down, I still don't really know why I'll walk into ...