Table 1 Measurement of the latent variables.

From: Exploring environmentally responsible behavior of megaproject contractors using an extended theory of planned behavior

Latent variable

Measurement items

Key source(s)

Attitudes

(ATT)

ATT1: Implementing ERB can improve environmental quality

24

ATT2: Implementing ERB can promote the sustainable development of engineering projects

ATT3: Implementing ERB can enhance environmental benefits

ATT4: Implementing ERB can enhance one’s social image

ATT5: The implementation of ERB is worthy of promotion

Subjective norms

(SN)

SN1: Competitors in the same industry are actively implementing ERB

24,60

SN2: Owners wish to promote ERB

SN3: The government aims to promote ERB

SN4: Industry associations believe that ERB should be implemented

SN5: Social media platforms constantly monitor the implementation of ERB

Perceived behavioral control

(PBC)

PBC1: Having sufficient technical capabilities to implement ERB

24,60

PBC2: Having sufficient managerial capabilities to implement ERB

PBC3: Having sufficient resources to implement ERB

PBC4: Having sufficient experience in implementing ERB

PBC5: Having sufficient confidence to implement ERB

Intentions

(INT)

INT1: Intending to implement ERB now

60

INT2: Intending to implement ERB in the future

INT3: Intending to consistently implement ERB

Moral identity

(MI)

MI1: I would be ashamed to be a person who exhibits these characteristics

44

MI2: Exhibiting these characteristics is not really important to me

MI3: It would make me feel good to be a person who exhibits these characteristics

MI4: Being someone who exhibits these characteristics is an important part of who I am

MI5: I strongly desire to have these characteristics

Corporate green culture

(CGC)

CGC1: Ensuring that each member understands the importance of environmental protection through collective efforts

56,62

CGC2: Establishing clear rules and regulations to encourage environmental awareness across all aspects

CGC3: Striving to minimize the adverse environmental impacts of the construction process with regard to contracted projects

CGC4: The core values emphasize environmental protection

CGC5: Linking environmental objectives with other corporate goals

CGC6: Actively engaging in construction technology innovation to minimize environmental impact

Environmentally responsible behavior

(ERB)

ERB1: Research and development expenditures related to green construction technologies account for a significant portion of total operating expenses

24,61

ERB2: The proportion of research and development personnel to total employees is higher in our case than among other contractors

ERB3: The focus of research and development personnel is shifting towards the development of green construction technology

ERB4: Collaborative projects with universities or research institutes with the goal of developing green construction technologies are pursued

ERB5: Advanced green construction equipment is used during the construction process

ERB6: Advanced green construction techniques are adopted during the construction process

ERB7: Clean energy is utilized during the construction process

ERB8: Environmentally friendly raw materials are used during the construction process

ERB9: Construction waste is recycled on-site

ERB10: Wastewater treatment facilities are introduced on-site

ERB11: Atmospheric pollution control facilities are introduced on-site

ERB12: Environmental monitoring facilities are introduced on-site, and environmental monitoring is conducted