Normative data of the Italian Famous Face Test: computerized administration protocol (PsychoPy) with original stimuli and decriptive statistics of celebrities included in IT-FFT

The faces we see in daily life exist on a continuum of familiarity, ranging from personally familiar to famous to unfamiliar faces. Thus, when assessing face recognition abilities, adequate evaluation measures should be employed to discriminate between each of these processes and their relative impairments. We here developed the Italian Famous Face Test (IT-FFT), a novel assessment tool for famous face recognition in Italian population. Normative data on a large sample (N= 436) of Italian individuals were collected, assessing both familiarity (d’) and recognition accuracy. Furthermore, this study explored whether individual possess insights into their overall face recognition skills by correlating the Prosopagnosia Index-20 (PI-20) with the IT-FFT; a negative correlation between these measures suggests that people have a moderate insight into their face recognition skills. Overall, our study provides the first online-based Italian test for famous faces (IT-FFT), a test that could be used alongside other standard tests of face recognition because it complements them by evaluating real-world face familiarity, providing a more comprehensive assessment of face recognition abilities. Testing different aspects of face recognition is crucial for understanding both typical and atypical face recognition.我们日常生活中所见的面孔，处于熟悉度的连续谱上，从个人熟悉面孔、名人面孔到陌生面孔不等。因此，在评估面孔识别能力时，应采用恰当的测评手段，以区分上述各类面孔识别过程及其相对应的损伤情况。本研究开发了意大利名人面孔测试（Italian Famous Face Test, IT-FFT），一款面向意大利人群的新型名人面孔识别测评工具。我们针对436名意大利个体组成的大样本收集了常模数据，同时评估了熟悉度指标（d’）与识别准确率。此外，本研究通过将面孔失认指数-20（Prosopagnosia Index-20, PI-20）与IT-FFT进行相关性分析，探讨了个体是否能对自身整体面孔识别能力具备元认知洞察：两项指标间呈负相关这一结果，表明人们对自身面孔识别能力具备中等程度的元认知洞察。总体而言，本研究推出了首个面向意大利人群的线上名人面孔测评工具（IT-FFT），该测试可与其他标准面孔识别测评工具协同使用——其通过评估现实场景下的面孔熟悉度来补充现有测评手段，从而实现对面孔识别能力更全面的评估。测评面孔识别的不同维度，对于理解典型与非典型面孔识别机制均至关重要。