On the consistency of cognitive load

There are many ways to induce cognitive load. In this paper, we manipulate cognitive capacity using four common techniques: a number memorization task, a visual pattern task, an auditory recall task, and time pressure. Under each load manipulation (as well as under ‘no load’), every participant completes a series of math problems, lottery tasks, logic puzzles, and allocation decisions. We find similar behavioral responses across all techniques: poorer performance on the math problems and logic puzzles, more risk aversion in the lottery tasks, and no systematic impact on allocation decisions. Using within-subject variation, we show that individuals whose math performance is most impacted for a given load manipulation (number memorization), are the same individuals whose performance is most impacted by other load manipulation, and in the other tasks. We also find that participants who scored above the median in a cognitive reflection test (CRT), and are thus able to resist the first response that comes to mind, are greatly impacted when placed under cognitive load; those scoring below the median in the CRT are not impacted much.