Welcome to the experiment! This experiment studies decision making between two individuals. In the following one hour or so, you will participate in {{ num_prac_rounds }} practice rounds and subsequently {{ num_off_rounds }} official rounds of decision making. The payment you will receive from this experiment will depend on your decisions as well as decisions made by other participants in official rounds.
There are three roles in the experiment:
At the beginning of the experiment, one third (1/3) of you will be randomly assigned to the role of H-sender and the remaining two third (2/3) to the role of Receiver. C-sender will only be played by the computer. Your role will remain fixed throughout the experiment.
At the beginning of each round, each receiver will be randomly matched with either H-sender (50% chance) or C-sender (50% chance) to form a pair. Receivers only know that it is equally likely to be matched with each type of sender, but do not know if the matched sender is H-sender or C-sender.
The sender-receiver pairs will be randomly reshuffled after each round to form new pairs.
Your screen will present an urn having 30 balls. Each ball is made of two parts:
The inner core is either Blue or Red; similarly, the outer shell that covers the inner core is either Blue or Red.
Among 30 balls,
That is, the color of the inner core is the same as the color of the outer shell for {{ correct_prob }}% of the balls.
Because the core is concealed by the shell, no one can observe the color of the core during the decision making.
Receiver’s goal is to correctly guess the color of the core in this experiment.
At the beginning of each round, the computer randomly draws one of the 30 balls from the urn for each pair. The random draw is independent across each pair and each round.
{% else %}Each round consists of two stages.
At the beginning of stage 1, the computer randomly draws one of the 30 balls from the urn for each pair. The random draw is independent across each pair, each stage, and each round.
{% endif %}The color of the outer shell of the chosen ball will be revealed to the sender but not to the receiver.
Before seeing the color of the shell, each H-sender needs to decide what message (between “BLUE” and “RED”) to send to the paired receiver about the color of the shell, using the following procedure:
Your screen will present two spinning wheels as follows:
When the color of the shell is Blue
When the color of the shell is Red
Using your mouse, you can hold the small circle-shape icon on each spinning wheel and roll it clockwise to choose the relative size of Blue and Red colors. The relative size of the two colors will be presented in a percentage form at the bottom of each spinning wheel.
Once you arrive at the relative sizes of Blue and Red colors that you desire for each spinning wheel, click the “Submit” button.
After you click the submit button, you will move to the next screen that presents the color of the shell of the chosen ball and the corresponding spinning wheel.
You are prompted to click the “Spin” button in the middle of the spinning wheel. Then the wheel starts spinning and the message will be sent to the paired receiver based on the outcome from the spinning wheel.
For example, suppose that you submitted the following spinning wheels.
When the color of the shell is Blue:
74% "RED", 26% "BLUE"
When the color of the shell is Red:
90% "RED", 10% "BLUE"
Then,
C-sender always sends the message truthfully. That is,
Each receiver will be presented
However, each receiver will NOT be informed
When the color of the shell is Blue:
74% "RED", 26% "BLUE"
When the color of the shell is Red:
90% "RED", 10% "BLUE"
Then the receiver is prompted to take one of the following two actions (representing receiver’s guess about the core color):
{% else %}Each receiver will receive a message from the paired sender, without knowing whether the sender is H-sender or C-sender. Then the receiver is prompted to take one of the following two actions (representing receiver’s guess about the core color):
{% endif %}After each receiver takes an action, the round is over.
{% else %}
After each receiver takes an action, Stage 1 is over and both players (sender and receiver) in each pair will be informed about the actual core color of the chosen ball in Stage 1.
Then they proceed to Stage 2.
The sender-receiver pair in Stage 2 is the same as that in Stage 1. That is, each receiver receives a message from the same sender (either H-sender or C-sender).
At the beginning of Stage 2, the computer randomly draws one of the 30 balls from a new urn for each pair, independent of the ball drawn in Stage 1. The color of the shell of the chosen ball will be revealed to the sender but not to the receiver.
The rest of the Stage 2 proceeds exactly the same as Stage 1.
One of the two stages is randomly selected with equal probabilities, then the selected stage earning becomes your earning in that round.
{% endif %}At the end of each round, you will be provided information feedback via a table listing:
At the end of each round, you will be provided information feedback via a table listing:
At the end of each ROUND, you will be provided information feedback via a table with two columns. Each column corresponds to each stage of the round listing:
Before we start the experiment for real, we will have a short “Comprehension Quiz”. Then you will participate in {{ num_prac_rounds }} practice rounds. The practice rounds are part of the instructions and not relevant to your payment. Their objective is to get you familiar with the computer interface and the flow of the decisions in each round. Once the practice rounds are over, the computer will tell you “The official rounds begin now!”
One of the {{ num_off_rounds }} official rounds will be randomly chosen to calculate your final cash reward. So, it is in your best interest to take each round equally seriously. Your final reward from the experiment will be the earning from the chosen round plus an additional show-up fee of {{ session.participation_fee|to0 }} 원.
At the beginning of the official round #1, my role is assigned to be Receiver.
{% formfield player.q1a %} {% formfield player.q1b %} {% formfield player.q1c %}At the beginning of the official round #1, my role is assigned to be H-Sender.
{% formfield player.q2a %} {% formfield player.q2b %} {% formfield player.q2c %}