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I have DM'd a couple of times and have been a long standing D&D/Pathfinder player. The one thing I see a lot in the games that I've played is metagaming.
For example, everyone rolls a Spot check. Only one person notices the creature, but then everyone starts to act cautiously, even if they don't mean to. I have tried to write down notes and handing it to one person but that slows the game down.
I'm about to start a new campaign where I am the DM, and I was wondering how to solve or at least make this easier.