Table 4 Two-by-two factorial analysis of the four conditions implemented.

From: The effect of psychopathy on cooperative strategies in an iterated Prisoner’s Dilemma experiment with emotional feedback

Positive feedback

Negative feedback

Absence of negative feedback (0)

Presence of negative feedback (1)

absence of positive feedback (0)

condition 1

condition 2

presence of positive feedback (1)

condition 3

condition 4