Kılıç Aslı, İnan Aslı Bahar
Department of Psychology, Middle East Technical University, Dumplupinar Bulv. No:1, Çankaya, 06800, Ankara, Turkey.
Department of Psychology, Çankaya University, Ankara, Turkey.
Atten Percept Psychophys. 2022 Jan;84(1):188-204. doi: 10.3758/s13414-021-02365-3. Epub 2021 Sep 13.
Mental number representation relies on mapping numerosity based on nonsymbolic stimuli to symbolic magnitudes. It is known that mental number representation builds on a logarithmic scale, and thus numerosity decisions result in underestimation. In the current study, we investigated the temporal dynamics of numerosity perception in four experiments by employing the response-deadline SAT procedure. We presented random number of dots and required participants to make a numerosity judgment by comparing the perceived number of dots to 50. Using temporal dynamics in numerosity perception allowed us to observe a response bias at early decisions and a systematic underestimation at late decisions. In all three experiments, providing feedback diminished the magnitude of underestimation, whereas in Experiment 3 the absence of feedback resulted in greater underestimation errors. These results were in accordance with the findings that suggested feedback is necessary for the calibration of the mental number representation.
心理数字表征依赖于将基于非符号刺激的数量映射到符号量级。已知心理数字表征建立在对数尺度上，因此数量判断会导致低估。在当前的研究中，我们通过采用反应截止时间SAT程序在四个实验中研究了数量感知的时间动态。我们呈现随机数量的点，并要求参与者通过将感知到的点数与50进行比较来做出数量判断。利用数量感知中的时间动态使我们能够观察到早期决策时的反应偏差和晚期决策时的系统性低估。在所有三个实验中，提供反馈减少了低估的程度，而在实验3中，没有反馈导致了更大的低估误差。这些结果与表明反馈对于心理数字表征的校准是必要的研究结果一致。
