 She also studied with Louis Horst, Merce Cunningham, Daniel Nagrin, Don Redlich, Mary Anthony, Charlotte Selver and Carola Speads, (both students of German body-reeducation pioneer Elsa Gindler), Jean Erdman, Janet Collins, and at the Martha Graham School.In 1962 Summers joined the composition class taught by Robert Ellis Dunn at the Merce Cunningham Studio in its second term, and subsequently became part of the workshop-group that would later be referred to as the Judson Dance Theater, together with Edward Bhartonne, Trisha Brown, Lucinda Childs, Ruth Emerson, Fred Herko, Sally Gross, Deborah Hay, David Gordon, John Herbert McDowell, Gretchen MacLane, Robert Morris, Aileen Passloff, Steve Paxton, Rudy Perez, Yvonne Rainer, Robert Rauschenberg, and Valda Setterfield.At Judson, Summers shared in the ongoing experiments with chance methods and pedestrian, everyday movements as part of the interest in expanding the then accepted methods of creating and performing dances.