Out of the six conditions, the longest lasting effects were associated with the act of writing "gratitude journals" where participants were asked to write down three things they were grateful for every day.
Kuuest olukorrast seostati kõige pikemalt kestvat mõju "tänulikkuse päevikute" (gratitude journals) täitmisega – osalejail paluti kirjutada iga päev üles kolm asja, mille üle nad tänulikud olid.