Question: A psychiatrist and a prominent American actor/writer teamed up in 2008 to explore what controversial theories?

Context articles: Daniel Stern (psychologist)
Ralph Greenson
Ben Stein
James F. Masterson
Edna Kenton
Nasser Pourpirar
Jacob Gartner Lauman
Jeffrey M. Schwartz
H. Brett Melendy
Emerging adulthood and early adulthood

Daniel N. Stern (August 16, 1934 – November 12, 2012) was a prominent American psychiatrist and psychoanalytic theorist, specializing in infant development, on which he had written a number of books — most notably "The Interpersonal World of the Infant" (1985).
Ralph R. Greenson (born Romeo Samuel Greenschpoon, September 20, 1911 – November 24, 1979) was a prominent American psychiatrist and psychoanalyst.
 Greenson is famous for being Marilyn Monroe's psychiatrist, and was the basis for Leo Rosten's 1963 novel, "Captain Newman, M.D.".
 The book was later made into a movie starring Gregory Peck as Greenson's character.
 There has been much conjecture, by investigating officers, press and the public, about Greenson's involvement in a possible cover-up concerning the circumstances of Monroe's death.
Benjamin Jeremy "Ben" Stein (born November 25, 1944) is an American writer, lawyer, actor, and commentator on political and economic issues.
 A graduate of Columbia University, Stein began his career in law, graduating as valedictorian from Yale Law School.
 He attained early success as a speechwriter for U.S. presidents Richard Nixon and Gerald Ford.
 Later, he entered the entertainment field and became an actor, comedian, and Emmy Award-winning game show host.
 He is most well-known on screen as the economics teacher in "Ferris Bueller's Day Off" (1986) and as Dr. Arthur Neuman in "The Mask" (1994) and "Son of the Mask" (2005).
 Stein is also a filmmaker.
 He co-wrote and starred in the 2008 documentary "", which portrays intelligent design creationism as a scientifically valid alternative to Darwinian evolution and alleges the existence of a cover-up by the scientific community against the evidence for creation.
James F. Masterson (March 25, 1926 – April 12, 2010) was a prominent American psychiatrist.
Edna Kenton (March 17, 1876 — February 28, 1954) was an American writer and literary critic.
 Kenton is best remembered for her 1928 work "The Book of Earths," which collected various unusual and controversial theories about a hollow earth, Atlantis, and similar matters.
Nasser Pourpirar, (Persian: ناصر پورپیرار‎ ‎ ; born "Nasser Banakonandeh" Persian: ناصر بناکننده‎ ‎ ; pen name: Naria, Persian: ناریا‎ ‎ ) (b. 1940 or 1941 in Tehran – d. 27 August 2015 in Tehran) was a famous Iranian writer and revisionist historian.
 He was known for his controversial theories questioning the academically recognized historiography of Iran from Achaemenids to the beginning of the Safavid period.
Jacob Gartner Lauman (January 20, 1813 – February 9, 1867) was a prominent American businessman from Iowa and a controversial general in the Union Army during the American Civil War.
Jeffrey M. Schwartz, M.D. is an American psychiatrist and researcher in the field of neuroplasticity and its application to obsessive-compulsive disorder (OCD).
 He is a proponent of mind/body dualism and appeared in the 2008 Film , in which he told interviewer Ben Stein that science should not be separated from religion.
Howard Brett Melendy (May 30, 1924 – April 19, 2008) was a prominent American historian, writer, researcher, publisher, autobiographer, dean, history professor, and filipinologist.
 Melendy was a professor and administrator at the San José State University in California and the University of Hawai'i.
 As a professor, he taught about the history of California and United States history.
 He was the first chairman of the history department of San José State University.
 He was a life member of the American Historical Association.
Emerging adulthood is a phase of the life span between adolescence and full-fledged adulthood which encompasses late adolescence and early adulthood, proposed by Jeffrey Arnett in a 2000 article in the "American Psychologist".
 It primarily describes people living in developed countries, but it is also experienced by young people in urban wealthy families in the Global South.
 The term describes young adults who do not have children, do not live in their own home, or do not have sufficient income to become fully independent in their early to late 20s.
 Arnett suggests emerging adulthood is the distinct period between 18 and 25 years of age where adolescents become more independent and explore various life possibilities.
 Arnett argues that this developmental period can be isolated from adolescence and young adulthood.
 Emerging adulthood is a new demographic, is contentiously changing, and some believe that twenty-somethings have always struggled with "identity exploration, instability, self-focus, and feeling in-between".
 Arnett called this period "roleless role" because emerging adults do a wide variety of activities and not constrained by any sort of "role requirements"."
 The developmental theory is highly controversial within the developmental field, with developmental psychologists contested over the legitimacy of Arnett's theories and methods.