隨著環境污染的問題日益嚴重，永續議題的討論度不斷地在提升。對此，聯合國也於2015年提出SDGs永續發展指標希望能夠解決相關問題，並強調永續消費行為的重要性。本研究旨在探討消費者是否會因為對環境議題的關注進而與大自然建立一種未明確訂定的心理契約，並影響他們對永續產品的態度與行為。
採用了PLS結構方程模型分析的研究結果顯示，消費者對於大自然的感激、連結、個人和社會規範與心理契約呈正相關，並進而影響對永續產品的態度、永續購買行為、支付溢價意願和產品轉換意願。環境自我效能能夠正向調節消費者與大自然的心理契約，性別與收入則無顯著影響。
本研究首次將大自然擬人化作為心理契約的對象，也驗證了其對永續消費層面的影響。這些發現對於品牌方在行銷策略的訂定上具有重要意涵，可以利用消費者的環保意識和連結感來提升競爭力與品牌忠誠度。
研究侷限包括樣本地區與時間的限制，未來研究應在不同文化背景下進行更多探討，並研究不同類型的永續產品和其他擬人化對象對消費行為的影響。

With the increasing severity of environmental pollution, the discussion of sustainability issues has been on the rise. In response, the United Nations proposed the Sustainable Development Goals (SDGs) in 2015 to address these issues and emphasize the importance of sustainable consumption behavior. This study aims to explore whether consumers will form an implicit psychological contract with nature which may influence their attitudes and behaviors towards sustainable products due to their concern for environmental issues.
The results, analyzed using PLS structural equation modeling, show that consumers' gratitude towards nature, connection with nature, personal norms, and social norms are positively correlated with psychological contracts. These psychological contracts, in turn, affect attitudes towards sustainable products, sustainable purchasing behavior, willingness to pay a premium, and willingness to switch to sustainable products. Environmental self-efficacy positively moderates the psychological contract between consumers and nature, while gender and income have no significant effect.
This study is the first to anthropomorphize nature as an object of psychological contracts, verifying its impact on sustainable consumption. These findings have important implications for brand marketing strategies, suggesting that leveraging consumers' environmental awareness and connection with nature can enhance competitiveness and brand loyalty.
The limitations of the study include restrictions on the sample's region and timeframe. Future research should explore different cultural contexts and investigate the effects of various types of sustainable products and other anthropomorphized entities on consumer behavior.

梁宏宇, 陈石, 熊红星, 孙配贞, 李放, & 郑雪. (2015). 人际感恩: 社会交往中重要的积极情绪. 心理科学进展, 23(3), 479.
Ajzen, I. (1991). The theory of planned behavior. Organizational behavior and human decision processes, 50(2), 179-211.
Argyris, C. (1960). Understanding organizational behavior.
Bandura, A. (1977). Self-efficacy: toward a unifying theory of behavioral change. Psychological review, 84(2), 191.
Bennett, R., Härtel, C. E., & McColl-Kennedy, J. R. (2005). Experience as a moderator of involvement and satisfaction on brand loyalty in a business-to-business setting 02-314R. Industrial marketing management, 34(1), 97-107.
Bissing-Olson, M. J., Fielding, K. S., & Iyer, A. (2016). Experiences of pride, not guilt, predict pro-environmental behavior when pro-environmental descriptive norms are more positive. Journal of Environmental Psychology, 45, 145-153.
Bohr, J. (2014). Public views on the dangers and importance of climate change: Predicting climate change beliefs in the United States through income moderated by party identification. Climatic change, 126, 217-227.
Chaudhary, R., & Bisai, S. (2018). Factors influencing green purchase behavior of millennials in India. Management of Environmental Quality: An International Journal, 29(5), 798-812.
Chekima, B., Chekima, S., Syed Khalid Wafa, S. A. W., Igau, O. A., & Sondoh Jr, S. L. (2016). Sustainable consumption: the effects of knowledge, cultural values, environmental advertising, and demographics. International Journal of Sustainable Development & World Ecology, 23(2), 210-220.
Cheng, Y. (2021). The effect of psychological contract combined with stress and health on employees’ management behavior. Frontiers in Psychology, 12, 667302.
Cohen, J. B., Pham, M. T., & Andrade, E. B. (2018). The nature and role of affect in consumer behavior. In Handbook of consumer psychology (pp. 306-357). Routledge.
David Lee, J., Bahl, A., Black, G. S., Duber-Smith, D. C., & Vowles, N. S. (2016). Sustainable and non-sustainable consumer behavior in young adults. Young Consumers, 17(1), 78-93.
De Canio, F., Martinelli, E., & Endrighi, E. (2021). Enhancing consumers' pro-environmental purchase intentions: the moderating role of environmental concern. International Journal of Retail & Distribution Management, 49(9), 1312-1329.
De Groot, J. I., Bondy, K., & Schuitema, G. (2021). Listen to others or yourself? The role of personal norms on the effectiveness of social norm interventions to change pro-environmental behavior. Journal of Environmental Psychology, 78, 101688.
De Medeiros, J. F., Ribeiro, J. L. D., & Cortimiglia, M. N. (2016). Influence of perceived value on purchasing decisions of green products in Brazil. Journal of Cleaner Production, 110, 158-169.
Diamantopoulos, A., Schlegelmilch, B. B., Sinkovics, R. R., & Bohlen, G. M. (2003). Can socio-demographics still play a role in profiling green consumers? A review of the evidence and an empirical investigation. Journal of Business Research, 56(6), 465-480.
Díaz, M. F., Charry, A., Sellitti, S., Ruzzante, M., Enciso, K., & Burkart, S. (2020). Psychological factors influencing pro-environmental behavior in developing countries: Evidence from Colombian and Nicaraguan students. Frontiers in Psychology, 11, 580730.
Dong, X., Liu, S., Li, H., Yang, Z., Liang, S., & Deng, N. (2020). Love of nature as a mediator between connectedness to nature and sustainable consumption behavior. Journal of Cleaner Production, 242, 118451.
Fishbein, M., & Ajzen, I. (1977). Belief, attitude, intention, and behavior: An introduction to theory and research.
Guo, L., Gruen, T. W., & Tang, C. (2017). Seeing relationships through the lens of psychological contracts: the structure of consumer service relationships. Journal of the Academy of Marketing Science, 45, 357-376.
Hair, J. F., Risher, J. J., Sarstedt, M., & Ringle, C. M. (2019). When to use and how to report the results of PLS-SEM. European business review, 31(1), 2-24.
Hanss, D., & Böhm, G. (2010). Can I make a difference? The role of general and domain-specific self-efficacy in sustainable consumption decisions. Explaining sustainable consumption. Findings from cross-sectional and intervention approaches.
Hosta, M., & Zabkar, V. (2021). Antecedents of environmentally and socially responsible sustainable consumer behavior. Journal of Business Ethics, 171(2), 273-293.
Huang, H. (2016). Media use, environmental beliefs, self-efficacy, and pro-environmental behavior. Journal of Business Research, 69(6), 2206-2212.
Jansson, J., & Dorrepaal, E. (2015). Personal norms for dealing with climate change: results from a survey using moral foundations theory. Sustainable Development, 23(6), 381-395.
Joshi, Y., & Rahman, Z. (2015). Factors affecting green purchase behaviour and future research directions. International Strategic management review, 3(1-2), 128-143.
Kamboj, S., & Matharu, M. (2021). Modelling the predictors of consumers’ willingness to pay premium price for sustainable products. Journal of Asia Business Studies, 15(4), 559-583.
Kanchanapibul, M., Lacka, E., Wang, X., & Chan, H. K. (2014). An empirical investigation of green purchase behaviour among the young generation. Journal of Cleaner Production, 66, 528-536.
Karatepe, O. M., Rezapouraghdam, H., & Hassannia, R. (2021). Does employee engagement mediate the influence of psychological contract breach on pro-environmental behaviors and intent to remain with the organization in the hotel industry? Journal of Hospitality Marketing & Management, 30(3), 326-353.
Kessler, E. H. (2013). Encyclopedia of management theory. Sage Publications.
Kingshott, R. P., Gaur, S. S., Sharma, P., Yap, S. F., & Kucherenko, Y. (2021). Made for each other? Psychological contracts and service brands evaluations. Journal of Services Marketing, 35(3), 271-286.
Kotter, J. P. (1973). The Psychological Contract: Managing the Joining-up Process. California Management Review, 15(3), 91-99. https://doi.org/10.2307/41164442
Kumar, S., & Yadav, R. (2021). The impact of shopping motivation on sustainable consumption: A study in the context of green apparel. Journal of Cleaner Production, 295, 126239.
Lambert, N. M., Graham, S. M., & Fincham, F. D. (2009). A prototype analysis of gratitude: Varieties of gratitude experiences. Personality and Social Psychology Bulletin, 35(9), 1193-1207.
Laroche, M., Bergeron, J., & Barbaro‐Forleo, G. (2001). Targeting consumers who are willing to pay more for environmentally friendly products. Journal of Consumer Marketing, 18(6), 503-520.
Latif, B., Gaskin, J., Gunarathne, N., Sroufe, R., Sharif, A., & Hanan, A. (2024). Climate change risk perception and pro-environmental behavior: the moderating role of environmental values and psychological contract breach. Social Responsibility Journal, 20(3), 538-567.
Lazaric, N., Le Guel, F., Belin, J., Oltra, V., Lavaud, S., & Douai, A. (2020). Determinants of sustainable consumption in France: the importance of social influence and environmental values. Journal of Evolutionary Economics, 30, 1337-1366.
Lee, S. H., Chang, H. J. J., & Zhao, L. (2023). The importance of personal norms and situational expectancies to sustainable behaviors: The norm activation and situational expectancy-value theories. Journal of Retailing and Consumer Services, 73, 103371.
Li, X., Liang, H., Jin, T., & Zhang, J. (2023). Psychometric properties of the Chinese version of the Trait Gratitude to Nature Scale. Frontiers in Psychology, 14, 1231962.
Liu, W., Chen, X., Lu, X., & Fan, X. (2021). Exploring the relationship between users' psychological contracts and their knowledge contribution in online health communities. Frontiers in Psychology, 12, 612030.
Liu, Y., Segev, S., & Villar, M. E. (2017). Comparing two mechanisms for green consumption: cognitive-affect behavior vs theory of reasoned action. Journal of Consumer Marketing, 34(5), 442-454.
Markowitz, E. M., & Shariff, A. F. (2012). Climate change and moral judgement. Nature climate change, 2(4), 243-247.
Mayer, F. S., & Frantz, C. M. (2004). The connectedness to nature scale: A measure of individuals’ feeling in community with nature. Journal of Environmental Psychology, 24(4), 503-515.
Mayer, F. S., Frantz, C. M., Bruehlman-Senecal, E., & Dolliver, K. (2009). Why is nature beneficial? The role of connectedness to nature. Environment and behavior, 41(5), 607-643.
Mazhar, W., Jalees, T., Asim, M., Alam, S. H., & Zaman, S. I. (2022). Psychological consumer behavior and sustainable green food purchase. Asia Pacific Journal of Marketing and Logistics, 34(10), 2350-2369.
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.
Megehee, C. M. (2009). Advertising time expansion, compression, and cognitive processing influences on consumer acceptance of message and brand. Journal of Business Research, 62(4), 420-431.
Melnyk, V., Carrillat, F. A., & Melnyk, V. (2022). The influence of social norms on consumer behavior: A meta-analysis. Journal of Marketing, 86(3), 98-120.
Nguyen, T. H. N., Yeh, Q. J., & Huang, C. Y. (2022). Understanding consumer’switching intention toward traceable agricultural products: Push‐pull‐mooring perspective. International Journal of Consumer Studies, 46(3), 870-888.
Nimse, P., Vijayan, A., Kumar, A., & Varadarajan, C. (2007). A review of green product databases. Environmental Progress, 26(2), 131-137. https://doi.org/https://doi.org/10.1002/ep.10210
Oh, J., Sudarshan, S., Jin, E., Nah, S., & Yu, N. (2020). How 360-degree video influences content perceptions and environmental behavior: The moderating effect of environmental self-efficacy. Science Communication, 42(4), 423-453.
Paillé, P., & Raineri, N. (2015). Linking perceived corporate environmental policies and employees eco-initiatives: The influence of perceived organizational support and psychological contract breach. Journal of Business Research, 68(11), 2404-2411.
Park, J., & Ha, S. (2012). Understanding pro‐environmental behavior: A comparison of sustainable consumers and apathetic consumers. International Journal of Retail & Distribution Management, 40(5), 388-403.
Perez-Castillo, D., & Vera-Martinez, J. (2021). Green behaviour and switching intention towards remanufactured products in sustainable consumers as potential earlier adopters. Asia Pacific Journal of Marketing and Logistics, 33(8), 1776-1797.
Pickett‐Baker, J., & Ozaki, R. (2008). Pro‐environmental products: marketing influence on consumer purchase decision. Journal of Consumer Marketing, 25(5), 281-293.
Rees, J. H., Klug, S., & Bamberg, S. (2015). Guilty conscience: motivating pro-environmental behavior by inducing negative moral emotions. Climatic change, 130, 439-452.
Rousseau, D. (1995). Psychological contracts in organizations: Understanding written and unwritten agreements. Sage publications.
Rousseau, D. M. (1990). New hire perceptions of their own and their employer's obligations: A study of psychological contracts. Journal of organizational behavior, 11(5), 389-400.
Rousseau, D. M. (2000). Psychological contract inventory.
Saracevic, S., & Schlegelmilch, B. B. (2021). The impact of social norms on pro-environmental behavior: A systematic literature review of the role of culture and self-construal. Sustainability, 13(9), 5156.
Schultz, P. W. (2000). New environmental theories: Empathizing with nature: The effects ofPerspective taking on concern for environmental issues. Journal of social issues, 56(3), 391-406.
Schultz, P. W. (2002). Inclusion with nature: The psychology of human-nature relations. In Psychology of sustainable development (pp. 61-78). Springer.
Schwartz, S. H. (1977). Normative influences on altruism. In Advances in experimental social psychology (Vol. 10, pp. 221-279). Elsevier.
Setiawan, B. (2021). Personal norm and pro-environmental consumer behavior: an application of norm activation theory. ASEAN Marketing Journal, 13(1), 40-49.
Shen, Y.-C., Lee, C. T., & Lin, W.-Y. (2023). Meme marketing on social media: the role of informational cues of brand memes in shaping consumers' brand relationship. Journal of Research in Interactive Marketing(ahead-of-print).
Steg, L., & Vlek, C. (2009). Encouraging pro-environmental behaviour: An integrative review and research agenda. Journal of Environmental Psychology, 29(3), 309-317.
Steindl-Rast, D. (2004). 282Gratitude as Thankfulness and as Gratefulness. In R. A. Emmons & M. E. McCullough (Eds.), The Psychology of Gratitude (pp. 0). Oxford University Press. https://doi.org/10.1093/acprof:oso/9780195150100.003.0014
Štofejová, L., Kráľ, Š., Fedorko, R., Bačík, R., & Tomášová, M. (2023). Sustainability and Consumer Behavior in Electronic Commerce. Sustainability, 15(22), 15902.
Tam, K.-P. (2022). Gratitude to nature: Presenting a theory of its conceptualization, measurement, and effects on pro-environmental behavior. Journal of Environmental Psychology, 79, 101754.
Tiwari, P. (2023). Analysing green self-efficacy and green altruism of millennials customers toward green purchases through the lens of the theory of planned behaviour. Public Organization Review, 23(4), 1545-1561.
Trivedi, R. H., Patel, J. D., & Savalia, J. R. (2015). Pro-environmental behaviour, locus of control and willingness to pay for environmental friendly products. Marketing Intelligence & Planning, 33(1), 67-89.
Trudel, R. (2019). Sustainable consumer behavior. Consumer psychology review, 2(1), 85-96.
van Tonder, E., Fullerton, S., & de Beer, L. T. (2020). Cognitive and emotional factors contributing to green customer citizenship behaviours: a moderated mediation model. Journal of Consumer Marketing, 37(6), 639-650.
Vermeir, I., & Verbeke, W. (2006). Sustainable food consumption: Exploring the consumer “attitude–behavioral intention” gap. Journal of Agricultural and Environmental ethics, 19, 169-194.
Vicente, P., Marques, C., & Reis, E. (2021). Willingness to pay for environmental quality: the effects of pro-environmental behavior, perceived behavior control, environmental activism, and educational level. SAGE Open, 11(4), 21582440211025256.
Wallis, H., & Loy, L. S. (2021). What drives pro-environmental activism of young people? A survey study on the Fridays For Future movement. Journal of Environmental Psychology, 74, 101581.
Wei, S., Ang, T., & Jancenelle, V. E. (2018). Willingness to pay more for green products: The interplay of consumer characteristics and customer participation. Journal of Retailing and Consumer Services, 45, 230-238.
Wijekoon, R., & Sabri, M. F. (2021). Determinants that influence green product purchase intention and behavior: A literature review and guiding framework. Sustainability, 13(11), 6219.
Woo, E., & Kim, Y. G. (2019). Consumer attitudes and buying behavior for green food products: From the aspect of green perceived value (GPV). British Food Journal, 121(2), 320-332.
Wood, A. M., Maltby, J., Gillett, R., Linley, P. A., & Joseph, S. (2008). The role of gratitude in the development of social support, stress, and depression: Two longitudinal studies. Journal of Research in personality, 42(4), 854-871.
Wu, C.-s., Zhou, X.-x., & Song, M. (2016). Sustainable consumer behavior in China: An empirical analysis from the Midwest regions. Journal of Cleaner Production, 134, 147-165.
Wu, J., Font, X., & Liu, J. (2021). Tourists’ Pro-environmental Behaviors: Moral Obligation or Disengagement? Journal of Travel Research, 60(4), 735-748. https://doi.org/10.1177/0047287520910787
Yadav, R., & Pathak, G. S. (2017). Determinants of consumers' green purchase behavior in a developing nation: Applying and extending the theory of planned behavior. Ecological economics, 134, 114-122.
Zeng, Z., Zhong, W., & Naz, S. (2023). Can environmental knowledge and risk perception make a difference? The role of environmental concern and pro-environmental behavior in fostering sustainable consumption behavior. Sustainability, 15(6), 4791.
Zhou, Z., Liu, J., Zeng, H., Zhang, T., & Chen, X. (2020). How does soil pollution risk perception affect farmers' pro-environmental behavior? The role of income level. Journal of environmental management, 270, 110806.