| Answer | % Correct |
|---|---|
| sh, shh | 70%
|
| hm, hmm | 65%
|
| mm | 61%
|
| zzz | 45%
|
| brr, brrr | 42%
|
| cwm, cwms | 35%
|
| pst, psst | 33%
|
| tsk, tsks, tsktsk, tsktsks | 25%
|
| nth | 23%
|
| pfft | 16%
|
| crwth, crwths | 15%
|
| pht, phpht | 14%
|