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. 2007 Feb 19;362(1480):507–522. doi: 10.1098/rstb.2006.1992

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© 2007 The Royal Society

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The caching and recovery conditions for ‘barrier’ experiment. Storers cached in a single trial when ‘observed’ and when ‘in private’. An opaque divider was attached to one side of the back of the storer's cage in the observed caching condition, such that the observer could only see one (full-view) tray, and to both sides of the cage during the in private caching condition preventing the observer from seeing either tray. full-view tray in the observed condition, out of view tray in the observed condition. Recovery always took place in private.

Inline graphic — The caching and recovery conditions for ‘barrier’ experiment. Storers cached in a single trial when ‘observed’ and when ‘in private’. An opaque divider was attached to one side of the back of the storer's cage in the observed caching condition, such that the observer could only see one (full-view) tray, and to both sides of the cage during the in private caching condition preventing the observer from seeing either tray. full-view tray in the observed condition, out of view tray in the observed condition. Recovery always took place in private.