* April 15 – Max Wertheimer, father of Gestalt Theory ( d. 1943 )

It had its foundations in the Gestalt psychology of Max Wertheimer, Wolfgang Köhler, and Kurt Koffka, and in the work of Jean Piaget, who provided a theory of stages / phases that describe children's cognitive development.

Max Wertheimer considered thinking to happen in two ways: productive and reproductive.

* On Max Wertheimer and Pablo Picasso

With Max Wertheimer, he developed a directional listening device that they referred to as the Wertbostel.

The insights of Poincaré and von Helmholtz were built on in early accounts of the creative process by pioneering theorists such as Graham Wallas and Max Wertheimer.

In 1924, Gestalt psychologist, Max Wertheimer identified this fact, stating ‘ There are entities where the behavior of the whole cannot be derived from its individual elements nor from the way these elements fit together ; rather the opposite is true: the properties of any of the parts are determined by the intrinsic structural laws of the whole ’ ( Wertheimer 1924, p.

Gestalt psychologists included Wolfgang Koehler, Max Wertheimer, Kurt Koffka.

The phi phenomenon is an optical illusion defined by Max Wertheimer in the Gestalt psychology in 1912, in which persistence of vision formed a part of the base of the theory of cinema, applied by Hugo Münsterberg in 1916.

* D. Brett King and Michael Wertheimer, Max Wertheimer and Gestalt Theory.

* On Max Wertheimer and Pablo Picasso

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At the arrangement of editor Max Eastman, the American magazine Reader's Digest also published an abridged version in April 1945, enabling The Road to Serfdom to reach a far wider audience than academics.

Maximilian Karl Emil " Max " Weber (; 21 April 1864 – 14 June 1920 ) was a German sociologist, philosopher, and political economist who profoundly influenced social theory, social research, and the discipline of sociology itself.

The rest of the hearings were presented on television each Sunday from April 1996 to June 1998 in hour-long episodes of the " Truth Commission Special Report " by progressive Afrikaner journalist Max du Preez, former editor of the Vrye Weekblad.

Dr. Max Rubner in an April 1919 article claimed that 100, 000 German civilians had died due to the continuation blockade of Germany after the armistice.

* April 5 – Max Gail, American actor

* April 10 – Max von Sydow, Swedish actor

* April 1 – Max Ernst, German artist ( b. 1891 )

* April 13 – Max Mosley, British motorsport boss

* April 21 – Max Weber, German sociologist ( d. 1920 )

* April 2 – Max Ernst, German painter ( d. 1976 )

* April 23 – Max Planck, German physicist, Nobel Prize laureate ( d. 1947 )

* The April 28, 1987 episode of the U. S. series Max Headroom entitled " War " featured a terrorist group known as the " White Brigade " who was dedicated to ' neo-radicalistic anarcho-syndicalism.

* Classic Disney Cartoons and Comic Books: Mickey Mouse, Donald Duck, Goofy, Minnie Mouse, Daisy Duck, Pluto, Clarabelle Cow, Horace Horsecollar, Huey, Dewey, and Louie, Gus Goose, Pete, Ludwig Von Drake, Clara Cluck, Chip ' n Dale, Scrooge McDuck, The Phantom Blot, April, May and June Duck, Humphrey the Bear, Ranger J. Audubon Woodlore, the Brownstone Park Bears, Pluto's Good and Bad Consciences, Red Riding Hood, Toby Tortoise, Max Hare, Flowers and Trees, Santa Claus, Reindeer, Hobo Cookie, Judge Cookie, the Skeleton Dancers, a Merry Dwarf, a Lamp from " The Whoopee Party ", the Lonesome Ghosts, Ferdinand the Bull, Susie the Little Blue Coupe, Professor Owl, Toot, Whistle, Plunk and Boom, Babe the Big Blue Ox, Dinah the Dachshund, Louie the Mountain Lion, Salty the Seal, a Rooster, a Hen, Girl Violin, Boy Saxophone, a Robot from " Mars and Beyond ", and various Black-and-White Characters.

Max von Sydow (; Swedish: ; born 10 April 1929 ) is a Swedish actor, born in Sweden and now holds dual Swedish and French citizenship.

Mosley and Diana had two sons: ( Oswald ) Alexander Mosley ( born 26 November 1938 ) and Max Rufus Mosley ( born 13 April 1940 ), president of the Fédération Internationale de l ' Automobile ( FIA ) for 16 years.

Programming in the Nick Play Date block is somewhat fluid, but as of April 2012, Dora the Explorer, Max and Ruby, Franklin and Friends, Team Umizoomi, Mike the Knight, and Bubble Guppies have a permanent place in the schedule.

In April 1915, his health recovered, he was posted as chief of staff to the 86th Infantry Division, which was serving as part of General Max von Gallwitz's forces on the eastern front.

It was founded in 1921 as Inkwell Studios ( or Out of the Inkwell Films ) by brothers Max Fleischer and Dave Fleischer who ran the company from its inception until Paramount Pictures, the studio's parent company and the distributor of its films, forced them to resign in April 1942.

Performers have included Collective Soul, Trooper, Tom Cochrane, April Wine, Sass Jordan, Glass Tiger, Dennis DeYoung, Chantal Kreviazuk, Theory of a Deadman, Kim Mitchell & Max Webster guitarist, Peter Fredette, Finger Eleven, Amanda Marshall and Our Lady Peace.

A staged reading was performed on April 3, 2012 at The Players Club in New York City, presented by TAPT ( The Artists ' Playground Theater ), directed by Alex Kelly and starring Matthew Dure ', Robert Lyons, Nichole Donje ' Jeffrey Hardy, Steven Hauck, Max Rhyser, Jessica Beaudry and Kate Downey.

Edward Max Nicholson ( 12 July 1904 – 26 April 2003 ) was a pioneering environmentalist, ornithologist and internationalist, and a founder of the World Wildlife Fund.

In April 2012, Lloyd Webber's Really Useful Group sold the building to Nimax Theatres ( Nica Burns and Max Weitzenhoffer ).

My Old Kentucky Home ( 1926 ) is a short animation film originally released on 13 April 1926, by Max and Dave Fleischer of Fleischer Studios as one of the Song Car-Tunes series.