Lost and Found

One thing I remember growing up are the grown up advise by my elders to stop looking for it. For example, before I leave the house for school, I remembered that I forgot the TI-83 Graphing Calculator. I get back home and I can't seem to remember where I placed it. The more I try to think about where it was, the more stressed out I get for not remembering. My mom would always say to stop thinking about it. Stop looking for it and you're brain will eventually remember it out of nowhere. There's a psychological term for this, but I can't seem to remember it.