IS , ▁test - re test ▁correl ations ▁for ▁all ▁scales ▁during ▁a ▁ 4 - month ▁period ▁are ▁> ▁. 7 0 . ▁ ▁Pet erson ▁& ▁Sel ig man ▁( 2 0 0 4 ) ▁provide ▁limited ▁data ▁on ▁the ▁valid ity ▁and ▁reli ability ▁of ▁the ▁VI A - IS . ▁ ▁In ▁fact , ▁the ▁only ▁published ▁statistics ▁are ▁stated ▁above . ▁The ▁research ers ▁say ▁that ▁they ▁will ▁provide ▁the ▁full ▁statistical ▁results ▁of ▁their ▁analysis ▁of ▁the ▁VI A - IS ▁in ▁a ▁future ▁publication . ▁ ▁However , ▁other ▁research ers ▁have ▁published ▁studies ▁that ▁challenge ▁the ▁valid ity ▁of ▁this ▁ 6 ▁factor ▁structure . ▁ ▁Emp ir ical ▁find ings ▁and ▁limitations ▁Although ▁research ers ▁have ▁not ▁yet ▁exam ined ▁the ▁valid ity ▁and ▁reli ability ▁of ▁the ▁VI A - IS , ▁they ▁are ▁beginning ▁to ▁look ▁at ▁how ▁the ▁ 2 4 ▁character ▁strength s ▁are ▁distributed ▁within ▁the ▁United ▁States ▁and ▁international ▁populations . ▁ ▁Research ers ▁found ▁that , ▁within ▁the ▁United ▁States , ▁the ▁most ▁commonly ▁end ors ed ▁strength s ▁are ▁kind ness , ▁fair ness , ▁hon esty , ▁grat itude ▁and ▁judgment . ▁ ▁The ▁less er ▁strength s ▁demonstrated ▁consist ency ▁across ▁states ▁and ▁regions ▁as ▁well : ▁pr ud ence , ▁mod esty ▁and ▁self - reg ulation . ▁ ▁The ▁research ers ▁did ▁not ▁find ▁regional ▁differences ▁in ▁the ▁rank - order ▁of ▁strength s , ▁with ▁the ▁exception ▁of ▁the ▁South ▁demonstr