School of Psychology, Cardiff University, UK.
School of Psychology, Cardiff University, UK.
Conscious Cogn. 2019 Oct;75:102797. doi: 10.1016/j.concog.2019.102797. Epub 2019 Aug 14.
Speed-accuracy trade-offs are often considered a confound in speeded choice tasks, but individual differences in strategy have been linked to personality and brain structure. We ask whether strategic adjustments in response caution are reliable, and whether they correlate across tasks and with impulsivity traits. In Study 1, participants performed Eriksen flanker and Stroop tasks in two sessions four weeks apart. We manipulated response caution by emphasising speed or accuracy. We fit the diffusion model for conflict tasks and correlated the change in boundary (accuracy - speed) across session and task. We observed moderate test-retest reliability, and medium to large correlations across tasks. We replicated this between-task correlation in Study 2 using flanker and perceptual decision tasks. We found no consistent correlations with impulsivity. Though moderate reliability poses a challenge for researchers interested in stable traits, consistent correlation between tasks indicates there are meaningful individual differences in the speed-accuracy trade-off.
速度-准确性权衡通常被认为是加速选择任务中的一个混淆因素，但个体在策略上的差异与个性和大脑结构有关。我们想知道，对谨慎反应的策略调整是否可靠，以及它们是否在不同任务和冲动特质上相关。在研究 1 中，参与者在相隔四周的两个会议上进行了 Eriksen 侧翼和 Stroop 任务。我们通过强调速度或准确性来操纵反应谨慎性。我们为冲突任务拟合了扩散模型，并在会议和任务之间对边界（准确性-速度）的变化进行了相关性分析。我们观察到中等的测试-重测可靠性，以及在任务之间的中等至大相关性。在研究 2 中，我们使用侧翼和知觉决策任务复制了这种任务间的相关性。我们没有发现与冲动性的一致相关性。尽管适度的可靠性对研究稳定特质的研究人员构成了挑战，但任务之间的一致性相关性表明，在速度-准确性权衡中有意义的个体差异。
