A blank expression is a facial expression characterized by neutral positioning of the facial features, implying a lack of strong emotion. It may be caused by a lack of emotion, depression, boredom or slight confusion, such as when someone refers to something which the listener does not understand. A deliberately-induced blank expression meant to conceal one's emotions is also known as a poker face, referring to the common practice of maintaining one's composure when playing the card game poker.
The term poker face was used outside the game of poker by American sportswriters in the 1920s to describe a competitor who appeared unaffected by stressful situations (an important skill when playing poker for money, to avoid giving an opponent any tells about one's hand). It is similarly used with reference to marketers and salespeople during business negotiations.
- Jan Hargrave (2010). Poker Face: The Art of Analyzing Poker Tells. Kendall Hunt Pub Co. ISBN 0-7575-7789-X.
- David Naimark; Ansar Haroun (2011). Poker Face in Mental Health Practice: A Primer on Deception Analysis and Detection. W W Norton & Co Inc. ISBN 0-393-70699-0.
- Judi James (2007). Poker Face: Mastering Body Language to Bluff, Read Tells and Win. Da Capo Press. p. 17. ISBN 1-60094-051-X.
- Richard D. Harroch; Lou Krieger (2011). Poker For Dummies. For Dummies. p. 22. ISBN 1-118-05358-3.
- Joey Lee Dillard (1985). Toward a social history of American English. Walter de Gruyter. p. 169. ISBN 3-11-010584-5.
- Arnold S. Goldstein (1981). The Complete Guide to Buying and Selling a Business. Penguin Group USA. p. 154. ISBN 0-452-26111-2.
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