'Musicians' by Michelle Roberts, 'The ones that I've been saving to make a feather bed' by Kate Bradbury, 'Fukushima Conjuration' by Matthew Sergison-Main, 'Woman' by Nigel Kingsbury, 'Cosmic Hat' by Phil Baird and 'Mermaid' by Manuel Lanca Bonifacio were named as the winning entries to the competition for artists from the margins at a prize-giving ceremony at the Gallery on Thursday 25 October.

The six prize-winning works were chosen by Art Historian Roger Cardinal, performance artist Bobby Baker and Director of Pallant House Gallery, Stefan van Raay, from the 80 works selected for the Outside In: National exhibition which is on show in the main spaces of the Gallery from Saturday 27 Oct 2012 to 3 Feb 2013.

Each award-winner will be offered the opportunity to have a solo exhibition at Pallant House Gallery in 2013 and 2014.

All of the judges were impressed by the quality and range of the works on show and agreed on the difficulty of making a selection. Director of Pallant House Gallery Stefan van Raay said: "I am really excited that Outside In has now gone national for the first time. As a judge I was dreading the fact that I had to pick out a few though actually we reached a consensus quite quickly. I know it is a cliché but everyone in this show is a winner and I am proud that we show this wealth of talent in the main exhibition spaces of the Gallery."

Roger Cardinal agreed: "It is not really about finding the top six, it is more about showing the public that ordinary people without training can produce great work. Art can happen anywhere in all sorts of places, not just in art centres and galleries but where you are. The works in this exhibition are expressions of individuality, pledges of intent, claims upon our time." For Bobby Baker, "The most powerful thing was seeing all the works together in this beautifully mounted and curated exhibition. I feel very privileged to be part of the process and completely bowled over by the exhibition."

Award winner Matthew Sergison-Main was selected for his work Fukushima Conjuration which depicts a nuclear power plant looming in the background while druid-like figures perform a menacing ritual in the foreground. "It is about man conjuring forces they cannot control," says Matthew. Winning for him was a "wonderful surprise" and "extremely gratifying". Another winner, Phil Baird, commented: "I was so pleased to be chosen - especially along with (fellow award winner) Kate Bradbury as we are like kindred spirits artistically."

The triennial competition marks the centre-point of the pioneering Outside In project which was set up in 2006 by Pallant House Gallery to provide opportunities for artists who see themselves as facing a barrier to the art world. The goal of the project is to create a fairer art world which rejects traditional value and institutional judgements about whose work can and should be displayed.

Outside In: National (27 Oct 2012-3 Feb 2013) will be shown as part of a season of exhibitions over the next few month at Pallant House Gallery celebrating art from the margins including the first solo show in a UK public Gallery for nearly 50 years of the father of Art Brut, Jean Dubuffet (20 Oct 2012 - 3 Feb 2013) and a show of the self-taught artist Pat Douthwaite (23 Oct 2012 - 3 Feb 2013).