How can I decide whether the present or the experimental dormitory arrangement is best?" "How can I choose the best college for me?" "How satisfied are our students with our professors?" "Which goals for our college have the greatest support in the community?" These questions are often heard by institutional researchers, psychologists, and sociologists. Asking these questions are students, administrators, and faculty. Implicitly, they all are asking for information that will help them make decisions. They want to choose, evaluate, or improve colleges. To do this, they need objective information that will help them choose between courses of action. So, they come to the researcher for help. What objective information can he provide that will be useful?If the researcher turns to current measures of college environments, he is likely to be frustrated. As recently suggested in a review (Baird, 1973), there is little in existing measures of the college environment to help in pragmatic decisions, and they are so atheoretical and global that they are unrelated to concepts that could suggest pragmatic actions. The purpose of this paper is to (1) review how environmental measures have been used and (2) suggest how environmental measures could be made more useful.The questions that researchers hear suggest the scope of purposes that environmental measures are asked to serve. These purposes may be grouped into several major categories of decisions for which environmental information may be useful: decisions among institutions, decisions within institutions, decisions concerning people, and decisions concerning nonpersonal resources. Decisions among institutions are those that involve the comparison of one institution with others, or of one type of institution with others, for example, when a high school student selects a college, or when a state legislator decides whether to spend more on universities or community colleges. Decisions within institutions are decisions that involve the comparison of one part of an institution with another, or of one way of doing things with another. Examples include comparing the teaching practices in the humanities with those in engineering and comparing an experimental curriculum with the regular curriculum. Decisions concerning people include those