Hello Ibrahim. I've used the Gratitude Questionnaire-6 in research and highly recommend it. It does a good job of assessing trait gratitude, though would be less appropriate for state gratitude. It also has one factor only so is less nuanced than other questionnaires such as the Gratitude, Appreciation and Resentment Test – Short Form (Watkins et al., 2003) that measures Social Appreciation, Appreciation of Simple Pleasures and a Sense of Abundance. It is short (6 items) and easy to complete, has good psychometric properties, and has been widely used in research. Hope this helps.
You may be interested in the comparative validation of the Short GRAT and GQ-6 performed by one of our PhD students (see link).
Jans-Beken concludes:
"Comparison of the outcomes of the SGRAT-NL with the outcomes of the GQ6-NL regarding reliability and validity in this study shows that there is great resemblance between both scales. The outcomes indicate that both scales are of sufficient psychometric quality to be used for assessment of the grateful disposition in individuals and groups (Kruyen, Emons, & Sijtsma, 2012). The choice between one scale or the other is therefore based on the amount of items, and on the different conceptualizations of both scales. The SGRAT-NL is based on three characteristics of individuals: lack of a sense of deprivation, simple appreciation, and appreciation of others; the GQ6-NL is based on four descriptive facets: intensity, frequency, span, and density."
Right now, our research group is conducting additional studies to also evaluate the ecological validity of both instruments.
I hope this contribution was valuable, looking forward to your findings.
Good luck and kind regards,
Johan
Article Measuring Gratitude: A Comparative Validation of the Dutch G...