| Attitude | I consider the purchase of energy-efficient appliances (EEAs) unfavorable (1)/favorable (5) I consider the purchase of EEA undesirable (1)/desirable (5) I consider the purchase of EEA unpleasant (1)/pleasant (5) I consider the purchase of EEA negative (1)/positive (5)
| Semantic differential scale | Hua and Wang (2019)Akroush, et al. (2019) |
| Subjective norms | Most people who are important to me think I should buy energy-efficient ones when it comes to the choice of household appliances If I buy an EEA, this can influence other people to buy an EEA People whose opinions I value would prefer that I purchase EEAs
| Five-point Likert scale with 1 being “strongly disagree” and 5 being “strongly agree” | Chen and Tung (2014)Tan, et al. (2017) |
| Perceived behavioral control | I can largely decide whether or not to buy an EEA I will have the ability to buy an EEA in the future I am confident that if I want to, I will definitely be able to choose an EEA in the near future
| Five-point Likert scale with 1 being “strongly disagree” and 5 being “strongly agree” | Tan, et al. (2017) |
| Moral norms | It is morally responsible to (other people and/or) the environment for me to conserve the natural resources It is my moral obligation to (other people and/or) the environment for me to save natural resources because they are limited It is my moral obligation to (other people and/or) the environment for me to reduce electricity usage
| Five-point Likert scale with 1 being “strongly disagree” and 5 being “strongly agree | Tan, et al. (2017)Shalender and Sharma (2019) |
| Environmental concern | I think the individuals and the society have the responsibility to protect the environment I think the environmental issues are becoming more serious in recent years I take into account environmental consequences while I buy an appliance I think we should live in harmony with the environment for achieving sustainable development
| Five-point Likert scale with 1 being “strongly disagree” and 5 being “strongly agree | Li, et al. (2019)Shalender and Sharma (2019) |
| Informational publicity | Related informational publicity about climate change and the environment promotes my energy-saving behavior The information learned from newspapers, television, and other media influences my energy-saving behavior Informational publicity has encouraged me to buy EEAs
| Five-point Likert scale with 1 being “strongly disagree” and 5 being “strongly agree | Wang, et al. (2014) |
| Perceived benefits | EEAs give me extra value (e.g. economic value, environmental value, and social value) EEAs have high utility EEAs can meet my product requirements I believe EEAs will save costs
| Five-point Likert scale with 1 being “strongly disagree” and 5 being “strongly agree” | Wang, et al. (2017)Akroush, et al. (2019) |
| Intention to purchase | In the future, I am willing to buy EEAs if I need to have home appliances In the future, I plan to buy appliances with better energy efficiency In the future, I intend to buy appliances with better energy efficiency
| Five-point Likert scale with 1 being “strongly disagree” and 5 being “strongly agree” | Wang, et al. (2017)Akroush, et al. (2019) |
| Purchase behavior | | Five-point Likert scale with 1 being “strongly disagree” and 5 being “strongly agree” | Jaiswal and Kant (2018)Chaudhary and Bisai (2018)Bhutto, et al. (2018) |
