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Supplementary material to the article “Assessing the environmental performance of ICT-based
services: does user behaviour make all the difference?” (Journal Sustainable Production and
Consumption)
Johanna Pohl, Vivian Frick, Matthias Finkbeiner and Tilman Santarius
Corresponding author: Johanna Pohl, Technische Universität Berlin, [email protected]-berlin.de
Online survey – smart home users
1. Do you have a smart heating system?
By smart heating system we mean a heating control that is connected to other sensors, can be
controlled externally or is self-learning.
☐ yes, I have a smart heating system
→
continue with question 2
☐ no, I do not have a smart heating control
→
exclusion
2. Why do you use your smart home system? open question
Please tell us in keywords what you like about your smart home system or what you use it for.
3. Why do you use your smart home system? table
I use my smart home system because....
1
Strongly
disagree
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3
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5
Strongly
agree
6
Do not know
… I want to increase my security at home.
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… I always want to be sure that my home is
well secured.
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… I can check that everything is safe at
home while I'm away.
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… because I want to meet my friends'
expectations.
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… because people who are important to me
like smart homes.
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… it arouses the interest of my
acquaintances and friends.
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.. it is a new experience.
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… it is exciting.
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… because I do not get bored with it.
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… it automates tedious activities.
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… it makes my life easier.
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… it enables a high level of comfort.
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… it works well for watching movies or
listening to music.
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…it allows me to place orders online.
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… it enables me to use entertainment
services throughout the whole flat.
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… I like to be up to date with technology.
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… I enjoy controlling a smart system.
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... I like dealing with technical devices.
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… it is an investment that pays off
financially.
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… it reduces my operating costs.
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… it saves me money.
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… it enables me to save resources.
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… because it enables me to adjust my
energy consumption so that I can live as
environmentally friendly as possible.
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… it helps me to protect the environment.
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… it is of high and consistent quality.
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… it is manufactured to a high standard.
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… it meets the highest standards and
expectations.
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4. Who arranged for the smart heating system to be installed in your home?
☐ the landlord before I moved in
☐ the landlord after I moved in
☐ me when I moved in
☐ someone from my household when moving in
☐ me after I moved in
☐ someone from my household after moving in
☐ I do not know
(Multiple answers possible))
5. Since when do you have your smart heating system?
MM/YYYY
6. How important were the following reasons for you to acquire a smart home system?
1
Not
important
2
3
4
5
Very
important
6
Do not
know
Ensuring safety at home.
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Increased comfort.
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Possibility of controlling devices/my
household.
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Opportunity to protect the environment.
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Saving money.
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Expectations/interest of my
friends/acquaintances/family.
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That it was an exciting new acquisition.
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Quality of the product.
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My technology enthusiasm.
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7. Please indicate to what extent you have noticed the following changes since you acquired
your smart home system. Since using my smart home system...
1
Strongly
disagree
2
3
4
5
Strongly
agree
7
Do not
know
… I save time.
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… I save money.
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… I save energy.
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… I save effort and hassle.
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8. Since I started using my smart home system, …
The room temperature is lower than
before.
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The room temperature is higher than
before.
I heat fewer rooms than before
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I heat more rooms than before
9. Please indicate how often you do the following activities now compared to before you
acquired your smart home.
1
Much less
than
before
2
3
Same as
before
4
5
Much more
than before
6
Do not
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Listen to music
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Watch TV / Movies
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Buy electronic devices
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Save energy by controlling my
electricity consumption
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Have lights switched on in rooms
where I am not currently staying
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10. Please indicate how often you perform the following activities. Please select "does not
concern me" if you do not own a device.
1
Never
2
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6
Always
7
Does not
concern me
I leave the TV on even if no one
is watching.
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When I leave the room, I keep
the light on.
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When buying new electrical
devices, I consciously pay
attention to their power
consumption.
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I leave my devices in standby
mode.
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In winter I ventilate only briefly,
but intensively.
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I defrost my fridge.
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When using the washing
machine, I wait until it is fully
loaded.
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I turn the heating down or off
before I go on holiday.
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I wash my clothes at a low
temperature (hot clothes at 60°,
only slightly dirty ones at 30°).
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11. [Environmental awareness] How much do you agree with the following statements?
1
Strongly
disagree
2
3
4
Strongly
agree
5
Do not know
Environmental protection should be a
priority for Germany, even if it
compromises economic growth.
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Each and every one of us must take
responsibility today in our own
surroundings for preserving an
environment worth living in for future
generations.
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In order to preserve our natural
livelihoods, we must all be willing to
limit our standard of living.
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Through our way of life, we are also
responsible for many environmental
problems in other countries (e.g.,
through the exploitation of raw
materials or waste exports).
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When buying, I pay attention to the
sustainability of products (e.g.
environmental compatibility, durability,
fair working conditions).
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12. [Norm-Activation-Model] Please indicate to what extent you agree with the following
statements.
5
1
Strongly
disagree
2
3
4
5
Strongly
agree
6
Do not know
The electricity consumption of private
households contributes significantly
to the threat to natural environment.
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The electricity consumption of
Private households is a major
contributor to climate change.
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Rising electricity consumption in the
private sector is a serious problem
for the environment.
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I am aware that my private energy
saving behaviour has an impact on
climate change.
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I believe that through energy-saving
behaviour I can make a contribution
to protect the environment.
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By consistently saving energy in the
household, I can make a decisive
contribution to environmental
protection.
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For environmental reasons, I
personally feel obliged to generally
save electricity in my household.
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I personally consider it my duty to
save energy in my household.
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For environmental reasons, I
personally feel obliged to save
energy wherever possible.
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13. [Green Tech Optimism] Please indicate to what extent you agree with the following
statements.
1
Strongly
disagree
2
3
4
5
Strongly
agree
6
Do not know
Seeing how the development of
green technologies is progressing
makes me optimistic about the
situation of our environment.
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Even through the further
development of green technologies,
we will not be able to stop climate
change.
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By using more and more efficient
household appliances (refrigerator,
washing machine, etc.) we can
master climate problems.
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The environmental problem will
become less important as appliances
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