The Development and Validation Of The Islamic Gratitude Scale (IGS-10)

Main Article Content

Ahmad Rusdi
Sakinah Sakinah
Putri Nilam Bachry
Novia Anindhita
Muflihah Azahra Iska Hasibuan

Abstract

There were not many adequate instruments to measure gratitude for the Indonesian people, especially the Muslim community. The purpose of this study is to develop the Islamic Gratitude Scale (IGS-10) by conducted an adequate set of tests. A total of 1218 respondents from students and workers participated on this study. This study found that the Islamic Gratitude Scale (IGS-10) has a good reliability (α= 0.863), good content validity and good factorial validity. The exploratory factor analysis found that IGS-10 has two factors, extrinsic gratitude (α= 0.845) and intrinsic gratitude (α= 0.761). Several sets of correlation tests found that IGS-10 has a good convergent validity, IGS-10 correlates with the Gratitude Questionerre (GQ-6), Gratitude Resentment and Appreciation Scale - Short Form (GRAT-SF), and gratitude toward God. Furthermore, IGS-10 correlated with Subjective Happiness Scale (SHS), Positive Affect and Negative Affect Schedule (PANAS), Multidimensional Body Self Relations Questionnaire - Appearance Scale (MBSRQ - US), and subjective well-being. This finding indicated that IGS-10 has a good cirterion-related validity. But unfortunately, IGS-10 did not correlate with Adolescents’ Self-concept Short Scale (ASCSS), optimism scale (LOT-R) and The Satisfaction with Life Scale (SWLS). IGS-10 was associated with Social Desirability Scale (SDS) with low correlation. To develop this scale the next process that can be done is norming, so that the IGS-10 will become a scale that can be used widely and more convincingly.

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The Development and Validation Of The Islamic Gratitude Scale (IGS-10). (2021). Psikis : Jurnal Psikologi Islami, 7(2), 120-142. https://doi.org/10.19109/psikis.v7i2.7872
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Author Biography

Ahmad Rusdi, Faculty of Psychology and Socio-Cultural Science, Universitas Islam Indonesia

Nama Lengkap : Dr. Ahmad Rusydi, MA.Si.TTL : Jakarta, 7 Maret 1988Alamat : Jl.Bangka Raya, Gg Amal 4, RT 006/011, No. 25,Pela Mampang, Mampang Prapatan, Jakarta SelatanNomor Telepon : 0898 9353 423

How to Cite

The Development and Validation Of The Islamic Gratitude Scale (IGS-10). (2021). Psikis : Jurnal Psikologi Islami, 7(2), 120-142. https://doi.org/10.19109/psikis.v7i2.7872

References

Abu-Raiya, H., & Pargament, K. I. (2011). Empirically based psychology of Islam: Summary and critique of the literature. Mental Health, Religion and Culture. https://doi.org/10.1080/13674670903426482

Adler, M. G., & Fagley, N. S. (2005). Appreciation: Individual differences in finding value and meaning as a unique predictor of subjective well-being. Journal of Personality, 73(1), 79–114. https://doi.org/10.1111/j.1467-6494.2004.00305.x

al-Ghazālī. (2005). Iḥyā’ ’ulūm al-dīn. Beirut: Dār Ibn Hazm. Retrieved from http://www.waqfeya.com/book.php?bid=8109

al-Kharā’iṭī. (1999). Makārim al-akhlāq wa ma’alīhā wa maḥmūd tarā’iqihā. Cairo: Dār al-Afāq al-’Arabiyyah. Retrieved from http://shamela.ws/index.php/book/9595

Ali, S. A., Ahmed, M., Bhatti, O. K., & Farooq, W. (2020). Gratitude and its conceptualization: An Islamic perspective. Journal of Religion and Health, 59(4). https://doi.org/10.1007/s10943-019-00850-6

Amjad, N., Ahmad, S., & Zaidi, G. (2013). Exploring gratitude in a Muslim Pakistani context. In International Conference of Cross Cultural psychology, University of Califonia. Los Angeles. Retrieved from https://www.researchgate.net/publication/303016558_gratitude_in_muslim_context

Ayre, C., & Scally, A. J. (2014). Critical values for Lawshe’s content validity ratio: Revisiting the original methods of calculation. Measurement and Evaluation in Counseling and Development, 47(1), 79–86. https://doi.org/10.1177/0748175613513808

Bonab, B. G., & Koohsar, A. A. H. (2011). Reliance on God as a core construct of Islamic psychology. In Procedia - Social and Behavioral Sciences (Vol. 30, pp. 216–220). https://doi.org/10.1016/j.sbspro.2011.10.043

Carlson, K. D., & Herdman, A. O. (2012). Understanding the impact of convergent validity on research results.
Organizational Research Methods, 15(1), 17–32. https://doi.org/10.1177/1094428110392383

Carlson, L., & Grossbart, S. (1988). Parental style and consumer socialization of children. Journal of Consumer Research, 15(1), 77–94. https://doi.org/10.1086/209147

Cash, T. F. (2000). The Multidimensional Body-Self Relations Questionnaire. Unpublished Test Manual. Norfolk, VA.

Cash, T. F. (2017). Multidimensional Body–Self Relations Questionnaire (MBSRQ). In T. Wade (Ed.), Encyclopedia of Feeding and Eating Disorders. Springer Singapore. https://doi.org/10.1007/978-981-287-087-2_3-1

Chadha, N. K. (2009). Applied psychometry. New Delhi: SAGE Publications India. https://doi.org/10.4135/9788132108221

Chan, D. W. (2013). Subjective well-being of Hong Kong Chinese teachers: The contribution of gratitude, forgiveness, and the orientations to happiness. Teaching and Teacher Education, 32, 22–30.
https://doi.org/10.1016/j.tate.2012.12.005

Chen, L. H., Chen, M., & Tsai, Y. (2012). Gratitude on well-being. International Journal of Psychology, 47(5), 381–392.

Chen, L. H., Chen, M. Y., Kee, Y. H., & Tsai, Y. M. (2009). Validation of the gratitude questionnaire (GQ) in Taiwanese undergraduate students. Journal of Happiness Studies, 10. https://doi.org/10.1007/s10902-008-9112-7

Cunha, L. F., Pellanda, L. C., & Reppold, C. T. (2019). Positive psychology and gratitude interventions: A randomized clinical trial. Frontiers in Psychology, 10, 584. https://doi.org/10.3389/fpsyg.2019.00584

Diener, E., Emmons, R., Larsen, R., & Griffin, S. (1985). The Satisfaction With Life Scale. Journal of Personality Assessment. https://doi.org/10.1207/s15327752jpa4901_13

Diessner, R., & Lewis, G. (2007). Further validation of the Gratitude, Resentment, and Appreciation Test (GRAT). Journal of Social Psychology, 147(4), 445–447. https://doi.org/10.3200/SOCP.147.4.445-448

Dunaev, J., Markey, C. H., & Brochu, P. M. (2018). An attitude of gratitude: The effects of body-focused gratitude on weight bias internalization and body image. Body Image, 25, 9–13. https://doi.org/10.1016/j.bodyim.2018.01.006

Duran, N. O. (2017). The Revised short gratitude, resentment, and appreciation test ( S-GRAT ): adaptation for Turkish college students. Journal of Hapiness & Wellbeing, 5(1), 23–37. Retrieved from https://www.researchgate.net/publication/315832710_The_Revised_Short_Gratitude_Resentment_and_Appreciation_Test_S-GRAT_Adaptation_for_Turkish_college_students

Dwinanda, R. (2016). Hubungan gratitude dengan citra tubuh pada remaja. Jurnal Ilmiah Psikologi Gunadarma, 9(1), 34–41. Retrieved from http://ejournal.gunadarma.ac.id/index.php/psiko/article/view/1541/1300

Emmons, R. A., & McCullough, M. E. (2003). Counting blessings versus burdens: An experimental investigation of gratitude and subjective well-being in daily life. Journal of Personality and Social Psychology. https://doi.org/10.1037/0022-3514.84.2.377

Emmons, R. A., & McCullough, M. E. (2012). The psychology of gratitude. The Psychology of Gratitude. Oxford University Press. https://doi.org/10.1093/acprof:oso/9780195150100.001.0001

Fagley, N. S. (2018). Appreciation (including gratitude) and affective well-being: Appreciation predicts positive and negative affect above the big five personality factors and demographics. SAGE Open, 8(4). https://doi.org/10.1177/2158244018818621

Froh, J. J., Fan, J., Emmons, R. A., Bono, G., Huebner, E. S., & Watkins, P. (2011). Measuring gratitude in youth: Assessing the psychometric properties of adult gratitude scales in children and adolescents. Psychological Assessment, 23(2), 311–324. https://doi.org/10.1037/a0021590

Froh, J. J., Yurkewicz, C., & Kashdan, T. B. (2009). Gratitude and subjective well-being in early adolescence: Examining gender differences. Journal of Adolescence, 32(3), 633–650. https://doi.org/10.1016/j.adolescence.2008.06.006

Gruszecka, E. (2015). Appreciating gratitude: Is gratitude an amplifier of well-being? Polish Psychological Bulletin, 46(2), 186–196. https://doi.org/10.1515/ppb-2015-0025

Halimatussa’diah, Zakiyah, M., Almih, M. M., Satriani, Azkarisa, Y. D., & Utami, D. S. (2020). Pengembangan alat ukur kebersyukuran mahasiswa muslim. Proyeksi, 15(1), 45. https://doi.org/10.30659/jp.15.1.45-57

Haque, A., Khan, F., Keshavarzi, H., & Rothman, A. E. (2016). Integrating islamic traditions in modern psychology: Research trends in last ten years. Journal of Muslim Mental Health, 10(1). https://doi.org/10.3998/jmmh.10381607.0010.107

Herawati, N., & Maryani, R. H. (2019). Makna kebahagiaan dan kebersyukuran pada komunitas hijaber. Indonesian Psychological Research, 01(01), 1–10.

Homan, K. J., & Tylka, T. L. (2018). Development and exploration of the gratitude model of body appreciation in women. Body Image, 25, 14–22. https://doi.org/10.1016/j.bodyim.2018.01.008

Huffman, J. C., Beale, E. E., Celano, C. M., Beach, S. R., Belcher, A. M., Moore, S. V., … Januzzi, J. L. (2016). Effects of optimism and gratitude on physical activity, biomarkers, and readmissions after an acute coronary syndrome: The gratitude research in acute coronary events study. Circulation: Cardiovascular Quality and Outcomes, 9(1), 55–63. https://doi.org/10.1161/CIRCOUTCOMES.115.002184

Hui, Q.-P., He, A.-M., & Liu, H.-S. (2015). A situational experiment about the relationship among gratitude, indebtedness, happiness and helping behavior. Chinese Mental Health Journal, 29(11), 852–857. Retrieved from http://search.proquest.com/docview/1758208320?accountid=11365%0Ahttp://sfx.nelliportaali.fi/sfxlcl3?url_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&genre=article&sid=ProQ:ProQ%3Apsycinfo&atitle=A+situational+experiment+about+the+relationship+

Hwang, H., Kang, H., Tak, J., & Lee, S. (2015). Impact of self-esteem and gratitude disposition on happiness in pre-service early childhood teachers. Procedia - Social and Behavioral Sciences.
https://doi.org/10.1016/j.sbspro.2015.01.1017

Iani, L., Lauriola, M., Layous, K., & Sirigatti, S. (2014). Happiness in Italy: Translation, factorial structure and norming of the Subjective Happiness Scale in a large community sample. Social Indicators Research, 118(3), 953–967.
https://doi.org/10.1007/s11205-013-0468-7

Ibn Ḥamīd, & Ibn Mulwaḥ. (1998). Mausū’ah naḍrah al-na’īm fī akhlāq al-Rasūl al-Karīm (Encyclopedia of the freshness of bliss in the morality of the Holy Prophet). Riyāḍ: Dār al-Wasīlah li al-Nashr wa al-Tawzī’. Retrieved from
http://waqfeya.com/book.php?bid=463

Ibn Qayyim. (1989). ’Uddah al-ṣābirīn wa dakhīrah al-shākirīn. Damascus: Dār ibn Kathīr. Retrieved from http://shamela.ws/index.php/book/11274

Iqbal, N., & Skinner, R. (2021). Islamic psychology: Emergence and current challenges. Archive for the Psychology of Religion. Retrieved from https://doi.org/10.1177/0084672420983496

Jans-Beken, L., Jacobs, N., Janssens, M., Peeters, S., Reijnders, J., Lechner, L., & Lataster, J. (2020). Gratitude and health: An updated review. Journal of Positive Psychology, 15(6), 743–782.
https://doi.org/10.1080/17439760.2019.1651888

Jovanović, V. (2014). Psychometric evaluation of a Serbian Version of the Subjective Happiness Scale. Social Indicators Research, 119(2), 1095–1104. https://doi.org/10.1007/s11205-013-0522-5

Kaplick, P. M., Chaudhary, Y., Hasan, A., Yusuf, A., & Keshavarzi, H. (2019). An interdisciplinary framework for Islamic cognitive theories. Zygon, 54(1), 66–85. https://doi.org/10.1111/zygo.12500

Karakasidou, E., Pezirkianidis, C., Stalikas, A., & Galanakis, M. (2016). Standardization of the Subjective Happiness Scale (SHS) in a Greek sample. Psychology, 07(14), 1753–1765. https://doi.org/10.4236/psych.2016.714164

King, M. F., & Bruner, G. C. (2000). Social desirability bias: A neglected aspect of validity testing. Psychology and Marketing, 17(2), 79–103. https://doi.org/10.1002/(SICI)1520-6793(200002)17:2<79::AID-MAR2>3.0.CO;2-0

Kong, F., Ding, K., & Zhao, J. (2015). The relationships among gratitude, self-esteem, social support and life satisfaction among undergraduate students. Journal of Happiness Studies, 16, 477–489. https://doi.org/10.1007/s10902-014-9519-2

Kotsou, I., & Leys, C. (2017). Subjective Happiness Scale (SHS): Psychometric properties of the French version of the scale (SHS-F) and its relationship to the psychological well-being, effect and depression. Canadian Journal Of
Behavioural Science-Revue Canadienne Des Sciences Du Comportement, 49(1), 1–6.
https://doi.org/10.1037/cbs0000060

Krause, N. (2006). Gratitude toward God, stress, and health in late life. Research on Aging, 28(2), 163–183. https://doi.org/10.1177/0164027505284048

Krus, D. J., & Ney, R. G. (1978). Convergent and discriminant validity in item analysis. Educational and Psychological Measurement, 38(1), 135–137. https://doi.org/10.1177/001316447803800118

Kurniawan, I. N., Romdhon, A., Akbar, P. L., & Endah, N. (2012). Pengembangan psychological measures of Islamic gratitude (PMIG-Ukuran-ukuran psikologis kebersyukuran dalam perspektif Islam). Yogyakarta. Retrieved from https://dspace.uii.ac.id/bitstream/handle/123456789/3676/Kurniawan %282014%29 Brief Report of PMIG.pdf?
sequence=1&isAllowed=y

Lambert, N. M., Fincham, F. D., Braithwaite, S. R., Graham, S. M., & Beach, S. R. H. (2009). Can prayer increase gratitude? Psychology of Religion and Spirituality. https://doi.org/10.1037/a0016731

Leguminosa, P., Nashori, F., & Rachmawati, M. A. (2017). Pelatihan kebersyukuran untuk menurunkan stres kerja guru di sekolah inklusi. Jurnal Ilmiah Psikologi Terapan, 5(2), 186–201. https://doi.org/10.22219/jipt.v5i2.4563

Lin, C. C. (2015). Self-esteem mediates the relationship between dispositional gratitude and well-being. Personality and Individual Differences, 85, 145–148. https://doi.org/10.1016/j.paid.2015.04.045

Listiyandini, R. A., Nathania, A., Syahniar, D., Sonia, L., & Nadya, R. (2017). Mengukur rasa syukur: Pengembangan model awal skala bersyukur versi Indonesia. Jurnal Psikologi Ulayat, 2(2), 473. https://doi.org/10.24854/jpu22015-41

Lyubomirsky, S., & Layous, K. (2013). How Do Simple Positive Activities Increase Well-Being? Current Directions in Psychological Science, 22(1), 57–62. https://doi.org/10.1177/0963721412469809

Lyubomirsky, S., & Lepper, H. S. (1999). A measure of subjective happiness: Preliminary reliability and construct validation. Social Indicators Research, 46(2), 137–155. https://doi.org/10.1023/A:1006824100041

Măirean, C., Turliuc, M. N., & Arghire, D. (2018). The relationship between trait gratitude and psychological wellbeing in university students: The mediating role of affective state and the moderating role of state gratitude. Journal of Happiness Studies, pp. 1–19. https://doi.org/10.1007/s10902-018-9998-7

Maskey, R., Fei, J., & Nguyen, H. O. (2018). Use of exploratory factor analysis in maritime research. Asian Journal of Shipping and Logistics, 34(2), 91–111. https://doi.org/10.1016/j.ajsl.2018.06.006

McCullough, M. E., Emmons, R. A., & Tsang, J. A. (2002). The grateful disposition: A conceptual and empirical topography. Journal of Personality and Social Psychology, 82(1), 112–127. https://doi.org/10.1037/0022-3514.82.1.112

Moghnie, L., & Kazarian, S. S. (2012). Subjective Happiness of Lebanese college youth in Lebanon: Factorial structure and invariance of the Arabic Subjective Happiness Scale. Social Indicators Research, 109(2), 203–210. https://doi.org/10.1007/s11205-011-9895-5

Mohajan, H. K. (2017). Two criteria for good measurements in research: Validity and reliability. Annals of Spiru Haret University. Economic Series, 17(3), 58–82. https://doi.org/10.26458/1746

Mukhlis, H., & Koentjoro. (2015). Pelatihan kebersyukuran untuk menurunkan kecemasan menghadapi ujian nasional pada siswa sma. Gadjah Mada Journal of Professional Psychology, 1(3), 203–2015. https://doi.org/10.22146/gamajpp.9395

Nan, H., Ni, M. Y., Lee, P. H., Tam, W. W. S., Lam, T. H., Leung, G. M., & McDowell, I. (2014). Psychometric evaluation of the Chinese version of the subjective happiness scale: Evidence from the Hong Kong family cohort. International Journal of Behavioral Medicine, 21(4), 646–652. https://doi.org/10.1007/s12529-014-9389-3

Nederhof, A. J. (1985). Methods of coping with social desirability bias: A review. European Journal of Social Psychology, 15, 263–280. https://doi.org/10.1002/ejsp.2420150303

Pavot, W., & Diener, E. (1993). The affective and cognitive context of self-reported measures of subjective well-being. Social Indicators Research, 28, 1–20. https://doi.org/10.1007/BF01086714

Pratiwi, M. E., & Supradewi, R. (2019). Intervensi Kebersyukuran Terhadap Subjective Well-Being Warga Binaan Pemasyarakatan Perempuan. In Konferensi ilmiah mahasiswa UNISSULA 2 (pp. 387–391). Retrieved from http://jurnal.unissula.ac.id/index.php/kimuhum/article/view/8155

Quezada, L., Landero, R., González, M. T., Kelimeler, A., Öznel, :, & Ölçeği, M. (2016). A validity and reliability study of the Subjective Happiness Scale in Mexico. The Journal of Happiness & Well-Being, 4(1), 90–100.

Rahmah, R. A., & Julianto, V. (2019). Pelatihan syukur al-Ghazali untuk menurunkan tingkat stres pada pembina asrama pesantren mahasiswi Yogyakarta. An Nafs: Jurnal Fakultas Psikologi, 13(2), 63–75. Retrieved from https://journal.uir.ac.id/index.php/annafs/article/view/4440

Rahmanita, A., Uyun, Q., & Sulistyarini, R. I. (2016). Efektivitas pelatihan kebersyukuran untuk meningkatkan kesejahteraan subjektif pada penderita hipertensi. Jurnal Intervensi Psikologi (JIP), 8(2), 165–184. https://doi.org/10.20885/intervensipsikologi.vol8.iss2.art2

Raju, P. S. (1980). Optimum stimulation level: Its relationship to personality, demographics, and exploratory Behavior. Journal of Consumer Research, 7(3), 272–282. https://doi.org/10.1086/208815
Rash, J. A., Matsuba, M. K., & Prkachin, K. M. (2011). Gratitude and well-being: Who benefits the most from a gratitude intervention? Applied Psychology: Health and Well-Being, 3(3), 350–369. https://doi.org/10.1111/j.1758-0854.2011.01058.x

Reynolds, W. M. (1982). Development of reliable and valid short forms of the marlowe‐crowne social desirability scale. Journal of Clinical Psychology, 39(1), 119–125. https://doi.org/10.1002/1097-4679(198201)38:1<119::AID-JCLP2270380118>3.0.CO;2-I

Richins, M. L. (1983). An analysis of consumer interaction styles in the marketplace. Journal of Consumer Research, 10, 73–82. https://doi.org/10.1086/208946

Robustelli, B. L., & Whisman, M. A. (2018). Gratitude and life satisfaction in the United States and Japan. Journal of Happiness Studies, 19, 41–55. https://doi.org/10.1007/s10902-016-9802-5

Rosmarin, D. H., Pirutinsky, S., Cohen, A. B., Galler, Y., & Krumreie, E. J. (2011). Grateful to god or just plain grateful? A comparison of religious and general gratitude. Journal of Positive Psychology, 6(5), 389–396. https://doi.org/10.1080/17439760.2011.596557

Ruberton, P. M., Kruse, E., & Lyubomirsky, S. (2016). Boosting state humility via gratitude, self-affirmation, and awe: Theoretical and empirical perspectives. In E. Worthington, D. Davis, & J. Hook (Eds.), Handbook of humility (pp. 260-273)). New York: Routledge.

Ruini, C., & Vescovelli, F. (2013). The role of gratitude in breast cancer: Its relationships with post-traumatic growth, psychological well-being, and distress. Journal of Happiness Studies, 14(1), 263–274. https://doi.org/10.1007/s10902-
012-9330-x

Rusdi, A. (2016). Syukur dalam psikologi islam dan konstruksi alat ukurnya. Jurnal Ilmiah Penelitian Psikologi, 2(2). Retrieved from http://jipp.uhamka.ac.id/index.php/jipp/article/download/19/17
Salces-Cubero, I. M., Ramírez-Fernández, E., & Ortega-Martínez, A. R. (2019). Strengths in older adults: differential
effect of savoring, gratitude and optimism on well-being. Aging and Mental Health, 23(8), 1017–1024.
https://doi.org/10.1080/13607863.2018.1471585

Salvador-Ferrer, C. (2017). The relationship between gratitude and life satisfaction in a sample of Spanish university students: The moderation role of gender. Anales de Psicología, 33(1), 114–119. https://doi.org/10.6018/analesps.33.1.226671

Sativa, A. R., & Helmi, A. F. (2013). Syukur dan harga diri dengan kebahagiaan remaja. Jurnal Psikologi, 5(10), 1–12.

Scheier, M. F., Carver, C. S., & Bridges, M. W. (1994). Distinguishing optimism from neuroticism (and trait anxiety, self-mastery, and self-esteem): A reevaluation of the Life Orientation Test. Journal of Personality and Social Psychology, 67(6), 1063–1078. https://doi.org/10.1037//0022-3514.67.6.1063

Sharma, P., & Kumar, S. (2015). Optimism, Gratitude and Emotional Intelligence as Correlates of Self-Confidence of Early Adults. International Journal of Indian Psychology, 2(4). https://doi.org/10.25215/0204.046

Sheldon, K. M., & Lyubomirsky, S. (2006). How to increase and sustain positive emotion: The effects of expressing gratitude and visualizing best possible selves. Journal of Positive Psychology, 1(2), 73–82. https://doi.org/10.1080/17439760500510676

Shi, J., Mo, X., & Sun, Z. (2012). Content validity index in scale development. Journal of Central South University (Medical Sciences), 37(2), 152–2. https://doi.org/10.3969/j.issn.1672-7347.2012.02.007

Shimai, S., Otake, K., Utsuki, N., Ikemi, A., & Lyubomirsky, S. (2004). Development of a Japanese version of the Subjective Happiness Scale (SHS), and examination of its validity and reliability. Nihon Kōshū Eisei Zasshi (Japanese Journal of Public Health), 51(10), 845–853. https://doi.org/10.11236/jph.51.10_845

Spagnoli, P., Caetano, A., & Silva, A. (2012). Psychometric properties of a Portuguese version of the Subjective Happiness Scale. Social Indicators Research, 105(1), 137–143. https://doi.org/10.1007/s11205-010-9769-2

Steyn, R. (2017). How many items are too many? An analysis of respondent disengagement when completing questionnaires. African Journal of Hospitality, Tourism and Leisure, 6(2), 1–11.

Strauss, M. E., & Smith, G. T. (2009). Construct validity: Advances in theory and methodology. Annual Review of Clinical Psychology, 5(1), 1–25. https://doi.org/10.1146/annurev.clinpsy.032408.153639

Swami, V., Stieger, S., Voracek, M., Dressler, S. G., Eisma, L., & Furnham, A. (2009). Psychometric evaluation of the tagalog and German subjective happiness scales and a cross-cultural comparison. Social Indicators Research, 93(2), 393–406. https://doi.org/10.1007/s11205-008-9331-7

Szcześniak, M., & Soares, E. (2011). Are proneness to forgive, optimism and gratitude associated with life satisfaction? Polish Psychological Bulletin, 42(1), 20–23. https://doi.org/10.2478/v10059-011-0004-z

Thomas, N., & Watkins, P. (2003). Measuring the grateful trait: Development of the Revised GRAT. In Poster presented to the Annual Convention of the Western Psychological Association. Vancouver.

Tiggemann, M., & Hage, K. (2019). Religion and spirituality: Pathways to positive body image. Body Image, 28, 135–141. https://doi.org/10.1016/j.bodyim.2019.01.004

Tylka, T. L. (2012). Positive psychology perspectives on body image. In Encyclopedia of Body Image and Human Appearance (Vol. 2, pp. 657–663). Elsevier Inc. https://doi.org/10.1016/B978-0-12-384925-0.00104-8

Veiga, F., & Leite, A. (2016). Adolescents’ Self-concept Short Scale: A Version of PHCSCS. Procedia - Social and Behavioral Sciences, 217, 631 – 637. https://doi.org/10.1016/j.sbspro.2016.02.079

Washizu, N., & Naito, T. (2015). The emotions sumanai, gratitude, and indebtedness, and their relations to interpersonal orientation and psychological well-being among Japanese university students. International Perspectives in Psychology: Research, Practice, Consultation, 4(3), 1–14. https://doi.org/10.1037/ipp0000037 M4 - Citavi

Watkins, P. C., Woodward, K., Stone, T., & Kolts, R. L. (2003). Gratitude and happiness: Development of a measure of gratitude, and relationships with subjective well-being. Social Behavior and Personality, 31(5). https://doi.org/10.2224/sbp.2003.31.5.431

Watson, D., Clark, L. A., & Tellegen, A. (1988). Development and validation of brief measures of positive and negative affect: The PANAS scales. Journal of Personality and Social Psychology, 54(6), 1063–1070. https://doi.org/10.1037//0022-3514.54.6.1063

Widawati, L., Saputra, A. K., Fauziah, D. N., & Susanti, M. A. (2018). Hubungan rasa syukur dengan citra tubuh pada Siswi SMA X kota Bandung. Psikologia, 3(1), 41–50. Retrieved from http://ojs.umsida.ac.id/index.php/psikologia/article/download/1716/1885

Wood, A. M., Joseph, S., & Maltby, J. (2008). Gratitude uniquely predicts satisfaction with life: Incremental validity above the domains and facets of the five factor model. Personality and Individual Differences, 45(1), 49–54. https://doi.org/10.1016/j.paid.2008.02.019

Wood, A. M., Joseph, S., & Maltby, J. (2009). Gratitude predicts psychological well-being above the Big Five facets. Personality and Individual Differences, 46(4), 443–447. https://doi.org/10.1016/j.paid.2008.11.012

Zhang, X., Noor, R., & Savalei, V. (2016). Examining the effect of reverse worded items on the factor structure of the
need for cognition scale. PLoS ONE, 15. https://doi.org/10.1371/journal.pone.0157795