Within the realm of artistic genres, the area of sculpture has perhaps become the most elastic in definition. Installation is sculpture. Performance is sculpture. Assemblage is sculpture. For many the word still evokes the traditional figurative carvings of Michelangelo or the rounded bronze castings of Henry Moore, but ultimately the term is endlessly pliable. For New York-based artist Arlene Shechet, sculpture is about action as well as form, about painterly experimentation as well as material. Her abstract, textural work is on view now at the Institute of Contemporary Art in a comprehensive retrospective that has introduced me to her art for the first time.