Without the pencil, subjects were excellent judges, but with the pencil in their mouth -- when they could not mimic the smile they saw -- their judgment was impaired.
Bez zīmuļa dalībnieki bija lieliski vērtētāji, bet ar zīmuli mutē, kad viņiem nebija iespējams  imitēt redzamo smaidu, viņu spriedums bija kļūdains.