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Language deprivation experiments have been claimed to have been attempted at least four times through history, isolating infants from the normal use of spoken or signed language in an attempt to discover the fundamental character of human nature or the origin of language.

The American literary scholar Roger Shattuck called this kind of research study the "forbidden experiment" because of the exceptional deprivation of ordinary human contact it requires.^[1] Although not designed to study language, similar experiments on non-human primates (labelled the "pit of despair") utilising complete social deprivation resulted in serious psychological disturbances.

In history

An early record of a study of this kind can be found in Herodotus's Histories. According to Herodotus (ca. 485 – 425 BC), the Egyptian pharaoh Psamtik I (664 – 610 BC) carried out such a study, and concluded the Phrygian race must antedate the Egyptians since the child had first spoken something similar to the Phrygian word bekos, meaning "bread".^[2] Recent researchers suggest this was likely a willful interpretation of their babbling.^[3]

An experiment allegedly carried out by Holy Roman Emperor Frederick II in the 13th century saw young infants raised without human interaction in an attempt to determine if there was a natural language that they might demonstrate once their voices matured. It is claimed he was seeking to discover what language would have been imparted into Adam and Eve by God. The experiments were recorded by the monk Salimbene di Adam in his Chronicles, who was generally extremely negative about Fredrick II (portraying his calamities as parallel to the Biblical plagues in The Twelve Calamities of Emperor Frederick II) and wrote that Frederick encouraged "foster-mothers and nurses to suckle and bathe and wash the children, but in no ways to prattle or speak with them; for he would have learnt whether they would speak the Hebrew language (which he took to have been the first), or Greek, or Latin, or Arabic, or perchance the tongue of their parents of whom they had been born. But he laboured in vain, for the children could not live without clappings of the hands, and gestures, and gladness of countenance, and blandishments."^[4]

A few centuries after Frederick II's alleged experiment, James IV of Scotland was said to have sent two children to be raised by a mute woman isolated on the island of Inchkeith, to determine if language was learned or innate.^[5] The children were reported to have spoken good Hebrew, but historians were sceptical of these claims soon after they were made.^[6]^[7]

Mughal emperor Akbar was later said to have children raised by mute wetnurses. Akbar held that speech arose from hearing; thus children raised without hearing human speech would become mute.^[8]

Some authors have doubted whether or how exactly the experiments of Psamtik I and James IV actually took place;^[9] and probably the same goes for that of Frederick II.^[10] Akbar's study is most likely authentic, but offers an ambiguous outcome.^[9]

In fiction

The "forbidden experiment" occurs in Paul Auster's The New York Trilogy.
In The Twilight Zone episode "Mute" (1963), several children are raised in such a manner to foster telepathic communication.
In the Batgirl comic series, the title character, Cassandra Cain, is deprived of spoken language during childhood. This was part of an attempt to create a martial artist with an exceptional ability to interpret body language, as it was believed that this would give one a great advantage in close combat.
In Le Miroir de Cassandre by Bernard Werber, the title character Cassandre and her older brother are deprived of spoken language during a part of their childhood as an experiment from their mother, a famous paedopsychologist
In Andrea Moro's first novel Il segreto di Pietramala^[11] where an entire village in Corsica undergoes the forbidden experiment. The novel won the Flaiano Prizes.

References

^ Shattuck, Roger (1994) [1980]. The Forbidden Experiment: The Story of the Wild Boy of Aveyron. Kodansha International. ISBN 1-56836-048-7.
^ Herodotus, History II:2, found in "An Account of Egypt".
^ Danesi, Marcel and Paul Perron (1999). Analyzing Cultures: An Introduction and Handbook. Indiana: Indiana University Press, p. 138.
McCulloch, Gretchen (2014). Slate Magazine. "What Happens if a Child Is Never Exposed to Language?"
^ Medieval Sourcebook: Salimbene: On Frederick II, 13th Century
^ "First Language Acquisition". Western Washington University. Archived from the original on 2017-07-20. Retrieved 2007-02-03.
^ Dalyell, John Graham, ed., The Chronicles of Scotland by Robert Lindsay of Pitscottie, vol. 1, Edinburgh (1814) pp. 249-250.
^ Davidson, J.P. (2011). Planet word. London: Michael Joseph. ISBN 9780141968933. Retrieved 1 July 2014.
^ M. Miles, SIGN, GESTURE & DEAFNESS IN SOUTH ASIAN & SOUTH-WEST ASIAN HISTORIES: a bibliography with annotation and excerpts from India; also from Afghanistan, Bangladesh, Burma/Myanmar, Iraq, Nepal, Pakistan, Persia/Iran, & Sri Lanka, c1200-1750 Archived 2008-02-22 at the Wayback Machine
^ ^a ^b Robin N Campbell & Robert Grieve (12/1981). Royal Investigations of the Origin of Language. Historiographia Linguistica 9(1-2):43-74 DOI: 10.1075/hl.9.1-2.04cam
^ Wi.Pö. (2000). Waisenkinderversuche (= Orphan Experiments). Lexikon der Psychologie (= Encyclopedia of Psychology). Spektrum Akademischer Verlag, Heidelberg.
^ Il segreto di Pietramala, La Nave di Teseo, Milano 2018; engl. transl. forthcoming

[forbidden-1] Shattuck, Roger (1994) [1980]. The Forbidden Experiment: The Story of the Wild Boy of Aveyron. Kodansha International. ISBN 1-56836-048-7.

[2] Herodotus, History II:2, found in "An Account of Egypt".

[3] Danesi, Marcel and Paul Perron (1999). Analyzing Cultures: An Introduction and Handbook. Indiana: Indiana University Press, p. 138.
McCulloch, Gretchen (2014). Slate Magazine. "What Happens if a Child Is Never Exposed to Language?"

[4] Medieval Sourcebook: Salimbene: On Frederick II, 13th Century

[fla-5] "First Language Acquisition". Western Washington University. Archived from the original on 2017-07-20. Retrieved 2007-02-03.

[6] Dalyell, John Graham, ed., The Chronicles of Scotland by Robert Lindsay of Pitscottie, vol. 1, Edinburgh (1814) pp. 249-250.

[7] Davidson, J.P. (2011). Planet word. London: Michael Joseph. ISBN 9780141968933. Retrieved 1 July 2014.

[Miles-8] M. Miles, SIGN, GESTURE & DEAFNESS IN SOUTH ASIAN & SOUTH-WEST ASIAN HISTORIES: a bibliography with annotation and excerpts from India; also from Afghanistan, Bangladesh, Burma/Myanmar, Iraq, Nepal, Pakistan, Persia/Iran, & Sri Lanka, c1200-1750 Archived 2008-02-22 at the Wayback Machine

[Campbell-9] Robin N Campbell & Robert Grieve (12/1981). Royal Investigations of the Origin of Language. Historiographia Linguistica 9(1-2):43-74 DOI: 10.1075/hl.9.1-2.04cam

[spektrum-10] Wi.Pö. (2000). Waisenkinderversuche (= Orphan Experiments). Lexikon der Psychologie (= Encyclopedia of Psychology). Spektrum Akademischer Verlag, Heidelberg.

[Il_segreto_di_Pietramala-11] Il segreto di Pietramala, La Nave di Teseo, Milano 2018; engl. transl. forthcoming

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@@ Line 1: / Line 1: @@
+{{Short description|Isolating infants from normal language}}
-/pandora.cii.wwu.edu/vajda/ling201/test4materials/childlangacquisition.htm |archive-date =2017-07-20 |url-status =dead }}</ref> The children were reported to have spoken good Hebrew, but historians were sceptical of these claims soon after they were made.<ref>[[John Graham Dalyell|Dalyell, John Graham]], ed., [https://books.google.com/books?id=1yYwAAAAYAAJ ''The Chronicles of Scotland by Robert Lindsay of Pitscottie'', vol. 1, Edinburgh (1814)] pp. 249-250.</ref><ref>{{cite book|last1=Davidson|first1=J.P.|title=Planet word|date=2011|publisher=Michael Joseph|location=London|isbn=9780141968933|url=https://books.google.com/books?id=OqfUJI3a5q4C&pg=PT53|access-date=1 July 2014}}</ref>
+'''Language deprivation experiments''' have been claimed to have been attempted at least four times through history, isolating infants from the normal use of spoken or signed [[language]] in an attempt to discover the fundamental character of [[human nature]] or the [[origin of language]].
+The American literary scholar [[Roger Shattuck]] called this kind of research study the "forbidden experiment" because of the exceptional deprivation of ordinary human contact it requires.<ref name="forbidden">{{cite book |last=Shattuck |first=Roger |url=https://books.google.com/books?id=9COPTtX16IIC&q=%22forbidden+experiment%22&pg=PP1 |title=The Forbidden Experiment: The Story of the Wild Boy of Aveyron |orig-year=1980 |year=1994|publisher=Kodansha International |isbn=1-56836-048-7 }}</ref> Although not designed to study language, similar experiments on non-human primates (labelled the "[[pit of despair]]") utilising complete social deprivation resulted in serious psychological disturbances.
+==In history==
+An early record of a study of this kind can be found in [[Herodotus]]'s ''[[Histories (Herodotus)|Histories]]''. According to Herodotus (ca. 485 – 425 BC), the [[Ancient Egypt|Egyptian]] [[pharaoh]] [[Psamtik I]] (664 – 610 BC) carried out such a study, and concluded the [[Phrygia]]n race must antedate the Egyptians since the child had first spoken something similar to the [[Phrygian language|Phrygian]] word ''bekos'', meaning "bread".<ref>Herodotus, ''History'' II:2, found in "[[s:An Account of Egypt|An Account of Egypt]]".</ref> Recent researchers suggest this was likely a willful interpretation of their babbling.<ref>Danesi, Marcel and Paul Perron (1999). Analyzing Cultures: An Introduction and Handbook. Indiana: Indiana University Press, p. 138.<br />McCulloch, Gretchen (2014). Slate Magazine. [http://www.slate.com/blogs/lexicon_valley/2014/07/16/children_not_exposed_to_language_nicaraguan_sign_language_wild_children.html/ "What Happens if a Child Is Never Exposed to Language?"]</ref>
+An experiment allegedly carried out by [[Frederick II, Holy Roman Emperor|Holy Roman Emperor Frederick II]] in the 13th century saw young infants [[feral child|raised without human interaction]] in an attempt to determine if there was a [[natural language]] that they might demonstrate once their voices matured. It is claimed he was seeking to discover what language would have been imparted into [[Adam and Eve]] by God. The experiments were recorded by the monk [[Salimbene di Adam]] in his ''Chronicles'', who was generally extremely negative about Fredrick II (portraying his ''calamities'' as parallel to the Biblical plagues in ''The Twelve Calamities of Emperor Frederick II'') and wrote that Frederick encouraged "foster-mothers and nurses to suckle and bathe and wash the children, but in no ways to prattle or speak with them; for he would have learnt whether they would speak the [[Hebrew language]] (which he took to have been the first), or [[Greek language|Greek]], or [[Latin]], or [[Arabic language|Arabic]], or perchance the tongue of their parents of whom they had been born. But he laboured in vain, for the children could not live without clappings of the hands, and gestures, and gladness of countenance, and blandishments."<ref>[http://www.fordham.edu/halsall/source/salimbene1.html Medieval Sourcebook: Salimbene: On Frederick II, 13th Century]</ref>
+A few centuries after Frederick II's alleged experiment, [[James IV of Scotland]] was said to have sent two children to be raised by a [[Muteness|mute]] woman isolated on the island of [[Inchkeith]], to determine if language was learned or innate.<ref name= "fla">{{cite web |title =First Language Acquisition |publisher =[[Western Washington University]] |url =http://pandora.cii.wwu.edu/vajda/ling201/test4materials/ChildLangAcquisition.htm |access-date =2007-02-03 |archive-url =https://web.archive.org/web/20170720011703/http://pandora.cii.wwu.edu/vajda/ling201/test4materials/childlangacquisition.htm |archive-date =2017-07-20 |url-status =dead }}</ref> The children were reported to have spoken good Hebrew, but historians were sceptical of these claims soon after they were made.<ref>[[John Graham Dalyell|Dalyell, John Graham]], ed., [https://books.google.com/books?id=1yYwAAAAYAAJ ''The Chronicles of Scotland by Robert Lindsay of Pitscottie'', vol. 1, Edinburgh (1814)] pp. 249-250.</ref><ref>{{cite book|last1=Davidson|first1=J.P.|title=Planet word|date=2011|publisher=Michael Joseph|location=London|isbn=9780141968933|url=https://books.google.com/books?id=OqfUJI3a5q4C&pg=PT53|access-date=1 July 2014}}</ref>
 [[Mughal emperor]] [[Akbar]] was later said to have children raised by mute wetnurses. Akbar held that speech arose from hearing; thus children raised without hearing human speech would become mute.<ref name="Miles">M. Miles, [http://www.sign-lang.uni-hamburg.de/bibweb/Miles/1200-1750.html ''SIGN, GESTURE & DEAFNESS IN SOUTH ASIAN & SOUTH-WEST ASIAN HISTORIES: a bibliography with annotation and excerpts from India; also from Afghanistan, Bangladesh, Burma/Myanmar, Iraq, Nepal, Pakistan, Persia/Iran, & Sri Lanka'', c1200-1750] {{webarchive|url=https://web.archive.org/web/20080222020147/http://www.sign-lang.uni-hamburg.de/bibweb/Miles/1200-1750.html |date=2008-02-22 }}</ref>
@@ Line 8: / Line 18: @@
 *The "forbidden experiment" occurs in [[Paul Auster]]'s ''[[The New York Trilogy]]''.
 *In ''[[The Twilight Zone (1959 TV series)|The Twilight Zone]]'' episode "[[Mute (The Twilight Zone)|Mute]]" ([[1963 in television|1963]]), several children are raised in such a manner to foster telepathic communication.
-*In the ''[[Batgirl]]'' comic series, the title character, [[Cassandra Cain]], is deprived of spoken language during childhood. This was part of an attempt to create a [[martial artist]] with an exceptional ability to interpret [[body language]], as it was believed that this would give one a great advan*In [[Andrea Moro]]'s first novel ''Il  di Pietramala''<ref name = "Il segreto di Pietramala"> Il segreto di Pietramala, La Nave di Teseo, Milano 2018; engl. transl. forthcoming </ref> where an entire village in Corsica undergoes the forbidden experiment. The novel won the [[Flaiano Prizes]].
+*In the ''[[Batgirl]]'' comic series, the title character, [[Cassandra Cain]], is deprived of spoken language during childhood. This was part of an attempt to create a [[martial artist]] with an exceptional ability to interpret [[body language]], as it was believed that this would give one a great advantage in [[close combat]].
+*In ''[[Le Miroir de Cassandre]]'' by [[Bernard Werber]], the title character Cassandre and her older brother are deprived of spoken language during a part of their childhood as an experiment from their mother, a famous paedopsychologist
+*In [[Andrea Moro]]'s first novel ''Il segreto di Pietramala''<ref name = "Il segreto di Pietramala"> Il segreto di Pietramala, La Nave di Teseo, Milano 2018; engl. transl. forthcoming </ref> where an entire village in Corsica undergoes the forbidden experiment. The novel won the [[Flaiano Prizes]].
 ==See also==