Hampshire College

About: Hampshire College is a education organization based out in Amherst Center, Massachusetts, United States. It is known for research contribution in the topics: Genetic programming & Population. The organization has 461 authors who have published 998 publications receiving 40827 citations.

Constraints on onsets and codas of words and phrases

Abstract: For any phonotactic restriction on syllable onsets and codas, it can be shown that parallel restrictions are attested at edges of each higher prosodic domain. Onsets can be required at the beginnings of syllables, words or utterances, codas can be banned at the ends of any of these constituents and so on. This paper argues that these restrictions follow from constraint schemata: any markedness constraint on syllable onsets or codas (MOns or MCoda) is part of a family of constraints (MOns(Ons/PCat) or MCoda(Coda/PCat)) which imposes parallel restrictions on initial onsets or final codas of each prosodic domain. These prosodic domain-edge markedness constraints can induce epenthesis, deletion or other segmental changes at domain edges; they can also shape the prosodic structure of words.

Participatory and Action Research Methods

Abstract: The term “action research” is associated in the USA with Kurt Lewin, who published extensively on action research from the 1940s onward and gave these methods their conceptual form. To Lewin (1946), action research was comparative research on the conditions and effects of various forms of social action and research leading to social action .... [it is] a big spiral of steps, each of which is composed of a circle of planning, action, and fact-finding about the result of the action. [Action, research, and training form] a triangle that should be kept together for the sake of any of the corners, (pp. 202–211)

Effect on health outcomes of a community-based medication therapy management program for seniors with limited incomes.

Abstract: Aging is closely linked to a broad array of risk factors that are associated with chronic disease and declining health. With increasing age, most individuals will have a growing and sustained need for a variety of prescription drug therapies. In a survey of noninstitutionalized adults, 94% of women

The Impact of Hyperselection on Lexicase Selection

Abstract: Lexicase selection is a parent selection method that has been shown to improve the problem solving power of genetic programming over a range of problems. Previous work has shown that it can also produce hyperselection events, in which a single individual is selected many more times than other individuals. Here we investigate the role that hyperselection plays in the problem-solving performance of lexicase selection. We run genetic programming on a set of program synthesis benchmark problems using lexicase and tournament selection, confirming that hyperselection occurs significantly more often and more drastically with lexicase selection, which also performs significantly better. We then show results from an experiment indicating that hyperselection is not integral to the problem-solving performance or diversity maintenance observed when using lexicase selection. We conclude that the power of lexicase selection stems from the collection of individuals that it selects, not from the unusual frequencies with which it sometimes selects them.