Research activities underway as part of the Air Force's Learning Abilities Measurement Program (LAMP) are described. A major objective of the program is to devise new models of the nature and organization of human abilities, that could be applied to improve personnel selection and classification systems. The activities of the project have been divided into two categories. The first category is concerned with identifying fundamental learning abilities by determining how learners differ in their abilities to think, remember, solve problems, and acquire knowledge and skills. A four-source framework is adopted which assumes that observed learner differences are due to differences in processing speed; processing capacity; and the breadth, extent, and accessibility of conceptual knowledge and procedural skills. The second category of research activities is concerned with validating new models of learning abilities. To do this, several computerized intelligent tutoring systems have been built that serve as mini-courses in technical areas, such as computer programming and troubleshooting electrical circuits. A major objective of this part of the program is to develop principles for producing indicators of student learning progress and achievement. These indicators will serve as learning outcome measures for ability test validation. Four figures and a 76-item list of references are included. (Author/TJH)