Lewandowski Z, Pisula-Lewandowska A
Department of Human Biology and Ecology, Faculty of Physiotherapy, University School of Physical Education, Wrocław, Poland.
Homo. 2008;59(3):253-60. doi: 10.1016/j.jchb.2008.04.003. Epub 2008 Jun 4.
This research attempts to answer the question how the change of selected face elements influences the likeness between the original portrait (sketch) and its modified versions. For this purpose, several series of portraits were created into which changes to the original sizes of eyes, mouth and nose within a scope of +/-14% (every 2%) were introduced. The task for a subject consisted of indicating one portrait out of each row that was the first to be "clearly unlike the original image". In this way, two values were obtained for each feature (lesser and greater than the initial one). These values have been called "the terminal values", i.e. those which, according to the subjects, once exceeded, the portrait becomes unlike the original. The results obtained indicate that the majority of the subjects, as much as 61.7%, consider the face they observe to be "clearly different" when the change of the studied features amounts to at least 8% of the original value, or even 6% in some cases. In addition, it has been noticed that, in the process of identification, men much earlier than women (p=0.049) consider the portraits in the row with the reduction of eye size unlike the original image.
所选面部元素的变化如何影响原始肖像（素描）与其修改版本之间的相似度。为此，创作了几组肖像，其中眼睛、嘴巴和鼻子的原始尺寸在±14%（每2%）的范围内发生了变化。受试者的任务是从每一排中指出最先“明显与原始图像不同”的一幅肖像。通过这种方式，为每个特征获得了两个值（小于和大于初始值）。这些值被称为“终值”，即根据受试者的判断，一旦超过这些值，肖像就会变得与原始肖像不同。所得结果表明，大多数受试者（多达61.7%）认为，当所研究特征的变化至少达到原始值的8%时，甚至在某些情况下达到6%时，他们所观察的面孔就“明显不同”。此外，还注意到，在识别过程中，男性比女性更早（p=0.049）认为眼睛尺寸减小的那一排肖像与原始图像不同。
