C.3 Protocol: Joy of Destruction Mini-Game
Double Anonymity Pseudo Double Anonymity
Single Anonymity During this game you will have the chance to earn points, which will be converted into cash at the end of today’s workshop. For each
point you will receive 1 N$. In this game, you are randomly matched with another participant in this workshop. This person will be your partner in this game. You will not learn the identity of
the participant you are matched with. Your partner will also never learn about your identity.
You and your partner both receive 20 POINTS in the beginning.
You then have to decide whether to reduce your partner’s points or to leave it as it is. Reducing your partner’s income will cost you 2 POINTS. By paying 2 POINTS, you can reduce the other partner’s
income by 10 POINTS. Your partner takes the same decision.
He/she can also choose between leaving your income unchanged or reducing it by 10 POINTS. Your partner will have the same cost – 2 POINTS – if he or she chooses to reduce your income. You will only
learn about your partner’s decision at the end of the workshop, when you will receive the payment. [EXPLAIN THE EXAMPLES
LOUDLY, SLOWLY AND CLEARLY BY USING POSTERS]
Let’s have a look at examples.
1. If both of you choose to leave the other person’s income un-changed, both of you will earn the 20 POINTS that you got at the beginning.
2. If both of you choose to reduce the other person’s income, both of you will earn 8 POINTS. Your initial 20 POINTS will be reduced by your partner by 10 POINTS. Reducing your partner’s income will costs you in addition 2 POINTS.
3. If you choose to reduce your partner’s income, but he/she decides to leave your income unchanged, you will earn 18 POINTS (20 – 2) and your partner will earn 10 POINTS (20 – 10).
4. If you choose to leave your partner’s income unchanged, but he/she decides to reduce yours, you will earn 10 POINTS (20 – 10) and your partner will earn 18 POINTS (20 – 2).
DO YOU HAVE ANY QUESTIONS?
Double Anonymity Pseudo Double Anonymity
Single Anonymity I will now explain how you will make the decision and receive the payments. You will make the decision in private inside the booth [SHOW AT BOOTH]. Each one of you will receive an envelope with
the decision sheet like this one [SHOW DECISION SHEET]. Then you have to decide whether you want to pay 2 Points to reduce the income of your partner by 10 Points or not. Please remember, that you get 20 Points and that each point is N$ 1 worth. On the sheet you are asked whether you want to reduce your partner’s income. If
you want to reduce his/her income you have to cross “YES”. If you want to leave your partner’s income you have to cross “NO”. DO
YOU HAVE ANY QUESTIONS?
All decision sheets and envelopes look exactly
the same.
[EXPERIMENTER]
will call you one by one and you will pick one envelope from this
box.
Each of you will receive an envelope
with the decision sheet. On the envelope, you will find
your ID number.
All decision sheets and envelopes look exactly
the same.
[EXPERIMENTER]
will call you one by one and you will pick one envelope from this
box.
Inside the envelope is also a key like this one with a letter on it. Do not show the letter to
anyone. Put it in a private place or your pockets.
Once you have made your decision you will open with this key the box with the
corresponding letter on it.
Place your decision sheet inside the envelope.
[SHOW DECISION SHEET]
Put the envelope inside the box and lock it.
After everyone has made his/her decision [EXPERIMENTER] will go to the booth and
open each box and record the decisions of everyone.
[EXPERIMENTER] will then prepare for each of you an envelope with the money you
have earned including the 20 N$
participation fee.
At the end of the workshop you will be able to go to the booth in private and open the
box. You can take the envelope, leave the key and leave the workshop directly.
You will then go to this booth in private [SHOW AT BOOTH].
After you made your decision, you call [EXPERIMENTER].
He will go to the booth and record your
decision.
After everyone has made his/her decision
[EXPERIMENTER]
will then prepare for each of you an envelope with the
money you have earned including the
20 N$ participation fee.
At the end of the workshop you will receive this envelope
from
[EXPERIMENTER]
in exchange for your player ID.
C.3. Protocol: Joy of Destruction Mini-Game Double Anonymity Pseudo Double
Anonymity
Single Anonymity DO YOU HAVE ANY QUESTIONS? [DEMONSTRATE
PROCEDURE IF NECESSARY]
DOES ANYONE NEED ASSISTANCE WITH WRITING OR LOCKING OR
OPENING THE BOX?
DOES ANYONE NEED ASSISTANCE
WITH WRITING?
Remember that there are no right or wrong decisions and no one from this village will ever know your decision.
We will now start with the decisions and call everyone one by one to the booth. [CALL PARTICIPANTS TO THE BOOTH]
[PUT BOTH PAPERS INSIDE THE ENVELOPE
AND THE ENVELOPE IN THE
BOX]
All three treatments included the same decision sheet as shown in Figure C.3.1.
Figure C.3.1: Decision Sheet Joy-of-Destruction Experiment (translated to English)