Conjecturing harmful intent and preemptive strike in paranoia
Paranoia depicts a belief of others having harmful intent. Research using economic games has exhibited the correlation between paranoia and the propensity to characterize ambiguous intentions as harmful. Using a non-clinical sample, we examine whether paranoid thoughts influence aggressive behavior against the subjective perception of harmful intent. We conducted a preemptive strike game wherein aggressive behavior was assumed to be guided by the fear of an opponent. The outcomes indicate that 1) individuals with high paranoia assume the harmful intent of an opponent more than those with low paranoia, 2) conjecturing an opponent’s harmful intent predicted an increase in the probability of a preemptive strike, 3) although the effect of paranoia on encouraging a preemptive strike was relatively minute. Also, the exploratory analysis revealed that paranoia was associated with aggressiveness. This study presents empirical evidence that paranoia functions as a response to perceived threats in an uncertain situation.