Physiognomy, or face reading and sometimes known by the later term anthroposcopy, is the practice of assessing a person's character or personality from their Physiognomy, or face reading and sometimes known by the later term anthroposcopy, is the practice of assessing a person's character or personality from their outer appearance—especially the face. The term physiognomy can also refer to the general appearance of a person, object, or terrain without reference to its implied characteristics—as in the physiognomy of an individual plant (e.g. plant life P… Physiognomy, or face reading and sometimes known by the later term anthroposcopy, is the practice of assessing a person's character or personality from their outer appearance—especially the face. The term physiognomy can also refer to the general appearance of a person, object, or terrain without reference to its implied characteristics—as in the physiognomy of an individual plant (e.g. plant life-form) or of a plant community (e.g. vegetation). Physiognomy as a practice meets the contemporary definition of pseudoscience, and is regarded as such by academics because of its unsupported claims; popular belief in the practice of physiognomy is nonetheless still widespread and modern advances in artificial intelligence have sparked renewed interest in the field of study. The practice was well-accepted by ancient Greek philosophers, but fell into disrepute in the 16th century while practised by vagabonds and mountebanks. It revived and was popularised by Johann Kaspar Lavater, before falling from favour in the late 19th century. Physiognomy in the 19th century is particularly noted as a basis for scientific racism. Physiognomy as it is understood today is a subject of renewed scientific interest, especially as it relates to machine learning and facial recognition technology. The main interest for scientists today are the risks, including privacy concerns, of physiognomy in the context of facial recognition algorithms. Notions of the relationship between an individual's outward appearance and inner character date back to antiquity, and occasionally appear in early Greek poetry. Siddhars from ancient India defined Samudrika Shastra as identifying personal characteristics with body features. Chinese physiognomy or Chinese face reading (mianxiang) dates back to at least the Spring and Autumn period. Early indications of a developed physiognomic theory appear in 5th century BC Athens, with the works of Zopyrus (featured in dialogue by Phaedo of Elis), an expert in the art. By the 4th century BC, the philosopher Aristotle frequently referred to theory and literature concerning the relationship of appearance to character. Aristotle was receptive to such an idea, evidenced by a passage in his Prior Analytics: Due to its legacy of racism and junk science masquerading as criminology, scientific study or discussion of the relationship between facial features and character has become taboo. It had previously posited many links. For example, there is evidence that character can influence facial appearance. Also, facial characteristics influence first impressions of others, which influences our expectations and behavior, which in turn influences character. Lastly, there are several biological factors that influence both facial appearance and character traits, such pre- and post-natal hormone levels and gene expression. The relationship between facial features and character traits such as political or sexual orientation is complex, but involves the fact that facial features can shape social behavior, partially as a result of the self-fulfilling prophecy effect. The self-fulfilling prophesy effect asserts that people perceived to have a certain attribute will be treated accordingly, and over time may engage in behaviors consistent with others' expectations of them. Conversely, social behavior such as addictions to drugs or alcohol, can shape facial features. A February 2009 article in New Scientist magazine reported that physiognomy is undergoing a small revival, with research papers trying to find links between personality traits and facial traits. A study of 90 ice hockey players found a statistically significant correlation between a wider face—a greater than average cheekbone-to-cheekbone distance relative to the distance between brow and upper lip—and the number of penalty minutes a player received for violent acts like slashing, elbowing, checking from behind, and fighting. This revival has continued in the 2010s with the rise of machine learning for facial recognition. For instance, researchers have claimed that it is possible to predict upper body strength and some personality traits (propensity to aggression) only by looking at the width of the face. Political orientation can also be reliably predicted. In a study that used facial recognition technology by analyzing the faces of over one million individuals, political orientation was predicted correctly 74% of the time; considerably better than chance (50%), human ability (55%) or even personality questionnaires (68%). Other studies have used AI and machine learning techniques to identify facial characteristics that predict honesty, personality, and intelligence. Machine learning algorithms can classify faces according to other information than just facial features studied by physiognomy. This includes temporary changes to the face (makeup, facial hair style, glasses) and even circumstances completely unrelated to the face (image quality, background colors, lighting conditions). In 2017, a controversial study claimed that an AI algorithm could detect sexual orientation 'more accurately than humans' (in 81% of the tested cases for men and 71% for women), but further research showed it was this non-frenologic information that allowed for such a high accuracy. Johann Kaspar Lavater On The Nature of Man, Which is the Foundation of the Science Which is called Physiognomy 1775 Mocan, Naci; Tekin,