基于速度与准确率权衡的心理测量学模型及应用

A Psychometric Model for Speed-accuracy Tradeoff and Application

在大规模被试评价中,任务完成的准确率一直是评价的主要指标。然而,在各种任务情景中,反映执行者素质的指标除了结果的正确性之外,决策过程的时效性同样是极其重要的。因此,开发一个适合大规模评价情景,同时考虑速度与准确率权衡的模型,探索被试作答准确率与速度间的关系将具有重要的价值。基于认知心理学实验中的速度与准确率研究,构建一个基于速度与准确率权衡的心理测量学模型。新模型参数能非常稳定而又精确地被估计,同时模型中的变量及其关系也能够很好地得到实测数据的支持。

The accuracy of completing a task has always been the main evaluation index in the large-scale assessment.However,during a variety of task situations,all the indexes indicating the quality of the doers are extremely important,including the correctness of the re-sult as well as the timeliness of the decision-making process.Therefore,the precision of results and fluency level of reaction should be regarded as the two indispensable indexes that evaluate the quality of each individual in finishing tasks.Grounded on the research of speed and accuracy in cognitive experiment,the manuscript will make the cognitive experiment of the speed-accuracy tradeoff model out of the lab and make it a large-scale assessment of model that can be applied to more complex situations of cognitive tasks by build-ing a psychometric model based on the speed-accuracy tradeoff.The new psychometric model of parameters based on speed-accuracy tradeoff can be estimated very stably and accurately.At the same time,the variables of model and their relations can be well supported by the real data.Finally,the quality of the subjects can be evaluated from different methods by the speed-accuracy tradeoff model.