Psychologists and economists have examined the effect of cognitive load in a variety of situations from risk taking to snack choice. We review previous experiments that have directly manipulated cognitive load and summarize their findings. We report the results of two new experiments where participants engage in a digit-memorization task while simultaneously performing a variety of economic tasks including: (1) choices involving risk, (2) choices involving intertemporal substitution, (3) choices with anchoring effects, (4) choices over healthy and unhealthy snacks, and (5) math problems. We find that higher cognitive load reduces numeracy as measured by performance in math problems. Moreover, within-subject analysis indicates that cognitive load leads to more risk-averse behavior, more impatience over money, and (nominally) more likelihood to anchor. We do not find any evidence that cognitive load increases impatience over consumption goods or unhealthy snack choices. Exploiting the panel nature of our data set, we find that those individuals who are most sensitive to cognitive load, as measured by a large drop in their own math performance across 1-and 8-digit memorization treatments, are driving much of the effect. * The authors wish to thank
Previous experiments have found that subjecting participants to cognitive load leads to poorer decision making, consistent with dual-system models of behavior. Rather than taxing the cognitive system, this paper reports the results of an experiment that takes a complementary approach: arousing the emotional system. The results indicate that exposure to arousing visual stimuli as compared to neutral images has a negligible impact on performance in arithmetic tasks, impatience, risk taking in the domain of losses, and snack choice although we find that arousal modestly increases in risk-taking in the gains domain and increases susceptibility to anchoring effects. We find the effect of arousal on decision making to be smaller and less consistent then the effect of increased cognitive load for the same tasks.
In a controlled laboratory experiment, we study the causal effect of alcohol on economic decision making. A treatment group was given a dose of alcohol designed to target a blood alcohol concentration (BAC) of 0.08 while the BAC of those in the control group remained 0.00. We investigate the behavior of control and treatment groups in the following types of tasks: math, uncertainty, overconfidence, strategic games, food choice, anchoring, and altruism. Our results indicate that alcohol consumption has little systematic effect on economic behavior, at least for the BAC level considered. Further, there is little evidence that alcohol differentially impacts the choices of male and female subjects.
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