Question:
Alfred Adler was born at Mariahilfer Strasse 208 in Rudolfsheim, then a village on the western fringes of Vienna, and today part of Rudolfsheim-Funfhaus, the 15th district of the city. He was second of the seven children of a Hungarian-born, Jewish grain merchant and his wife. Alfred's younger brother died in the bed next to him, when Alfred was only three years old. Alfred was an active, popular child and an average student who was also known for his competitive attitude toward his older brother, Sigmund.
Adler's ideas regarding non-heterosexual sexuality and various social forms of deviance have long been controversial. Along with prostitution and criminality, Adler had classified 'homosexuals' as falling among the "failures of life". In 1917, he began his writings on homosexuality with a 52-page magazine, and sporadically published more thoughts throughout the rest of his life.  The Dutch psychologist Gerard J. M. van den Aardweg underlines how Alfred Adler came to his conclusions for, in 1917, Adler believed that he had established a connection between homosexuality and an inferiority complex towards one's own gender. This point of view differed from Freud's theory that homosexuality is rooted in narcissism or Jung's view of expressions of contrasexuality vis-a-vis the archetypes of the Anima and Animus.  There is evidence that Adler may have moved towards abandoning the hypothesis. Towards the end of Adler's life, in the mid-1930s, his opinion towards homosexuality began to shift. Elizabeth H. McDowell, a New York state family social worker recalls undertaking supervision with Adler on a young man who was "living in sin" with an older man in New York City. Adler asked her, "Is he happy, would you say?" "Oh yes," McDowell replied. Adler then stated, "Well, why don't we leave him alone."  According to Phyllis Bottome, who wrote Adler's Biography (after Adler himself laid upon her that task): "Homosexuality he always treated as lack of courage. These were but ways of obtaining a slight release for a physical need while avoiding a greater obligation. A transient partner of your own sex is a better known road and requires less courage than a permanent contact with an "unknown" sex. [...] Adler taught that men cannot be judged from within by their "possessions," as he used to call nerves, glands, traumas, drives et cetera, since both judge and prisoner are liable to misconstrue what is invisible and incalculable; but that he can be judged, with no danger from introspection, by how he measures up to the three common life tasks set before every human being between the cradle and the grave. Work or employment, love or marriage, social contact."
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What is Alfred Adler known for?

Answer:
Adler's ideas regarding non-heterosexual sexuality and various social forms of deviance have long been controversial.

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Cudi was born Scott Ramon Seguro Mescudi on January 30, 1984, in Cleveland, Ohio, and grew up in Shaker Heights and Solon. He is the youngest of four children, with two brothers, Domingo and Dean, and a sister, Maisha. His mother, Elsie Harriet (Banks), is a middle-school choir teacher at Roxboro Middle School in Cleveland Heights, Ohio. His father, Lindberg Styles Mescudi, was a house painter, substitute teacher and World War II Air Force veteran.
Kid Cudi's musical style has been described as "an atmospheric take on melodic rap, with a dollop of charming, off-key singing". He has also been called "introspective, with the ability to lay his insecurities on record and expose his fallibility." In 2015, Kris Ex of Billboard, wrote "he's always been an emotional artist, dealing with expansive and nebulous feelings in acute and often destructive ways." Kid Cudi's sound is what inspired and led Kanye West to create his cathartic 808s & Heartbreak (2008), with West later stating that he and Cudi were "the originators of the style, kinda like what Alexander McQueen is to fashion.... Everything else is just Zara and H&M." West also complimented Cudi by saying, "His writing is just so pure and natural and important." In March 2014, Cudi talked about wanting to provide guidance for young listeners with his music: "my mission statement since day one [...] all I wanted to do was help kids not feel alone, and stop committing suicide."  In a 2013 article for The BoomBox, the author wrote: "On [A Kid Named Cudi], Cudi raps and croons over samples and interpolations of Gnarls Barkley, Paul Simon, Band of Horses, J Dilla, Nosaj Thing, N.E.R.D. and Outkast. He melded indie rock, electronica and dubstep seamlessly with hip-hop without pandering or reaching. Before Drake broke through with 2009's So Far Gone, rapping and singing over Swedish indie poppers Lykke Li and Peter Bjorn and John, Cudi tweaked with multi-genre covers and seamless transitions between singing and rapping." In a 2009 interview with HipHopDX, when speaking on his debut album Cudi stated: "Well one thing I wanted to do was combine sounds that really bring out intense moods."  Kid Cudi's music has also been described as trip hop. Furthermore, he is known for harmonizing and humming in his music, which helps formulate his signature sound. On 2011's WZRD and 2015's Speedin' Bullet 2 Heaven, Cudi incorporated the use of screamed vocals, and can be heard yodeling on his 2016 album Passion, Pain & Demon Slayin'. Throughout the years he has also incorporated elements of psychedelia, R&B, electronica, synthpop and grunge, in his music.

what is his signature sound?
screamed vocals, and can be heard yodeling on his 2016 album Passion, Pain & Demon Slayin'.