The heatmap2d selector

The heatmap2d selector is an option for the CONG graphical user interface

HeatmapSingle?

period

paid

length

subperiods

percentChangePerSecond

groupSize

payoffFunction

name

min

max

Aa

Ab

Ba

Bb

mixed

selector

matrixDisplay

showHeatmapLegend

4

TRUE

60

1

NaN

1

matrix2x2

first

0

17

10

0

18

4

TRUE

heatmap2d

HeatmapSingle

TRUE

• Experimentalists should be careful to ensure colorblind subjects play the game carefully. They may not be able to see correctly the heatmap selector below.
• mixed is set to TRUE. The players can see the heatmap, but you'd only be able to choose A or B (coop or defect). This will be useful in the hawk-dove game, with one and two-population games.
• selector This option enable the player to use the heatmap to change their strategy as opposed to the default option, pure.
• matrixDisplay We have set this to "HeatmapSingle" which is the default display for heatmaps. We will discuss this option more in the Heatmap Both treatment.
• showHeatmapLegend We have set this to TRUE so it displays the heatmap legend. We will go into more detail about this option in further sections.

Figure - The colorful heatmap selector is clearly displayed for the player with payoff info. on the edges. In this screenshot both players have chosen to defect resulting in zero points for each player.

HeatmapBoth?

period

paid

length

subperiods

percentChangePerSecond

groupSize

payoffFunction

name

min

max

Aa

Ab

Ba

Bb

mixed

selector

matrixDisplay

showHeatmapLegend

6

TRUE

60

1

NaN

1

matrix2x2

first

0

17

10

0

18

4

TRUE

heatmap2d

HeatmapBoth

TRUE

• This treatment displays two heatmaps one of which shows how your actions affect the payoffs of the other player's. In discrete time, it gets tricky. For each player's perspective, they are always a 'row' player, meaning players only move up and down, along the y-axis.
• selector - as per usual this is set to "heatmap2d"
• matrixDisplay- this field is set to "HeatmapBoth"

Figure - The second heatmap above the primary heatmap can be seen in the upper left corner. This is where the player can view the other player's payoffs.

Corners

period

paid

length

subperiods

percentChangePerSecond

groupSize

payoffFunction

name

min

max

Aa

Ab

Ba

Bb

mixed

selector

matrixDisplay

showHeatmapLegend

5

TRUE

60

0

NaN

1

matrix2x2

first

0

17

10

0

18

4

TRUE

heatmap2d

corners

TRUE

• In this treatment there is no heat map, it only tells you payoff info in the corners. Players can choose mixed strategies (up for cooperate, down for defect again).
• selector - this field is set to "heatmap2d" as per usual (though the heatmap is not visible the selector functions the same way).
• matrixDisplay - is set to "corners"

Figure - In this photo the corner's selections is two agents going at it, each computer agent choose the best response with a white-noise process added for a bit of randomness for the purpose of stress-testing.