The 2015 recipients of the APA Professional Contributions Awards were selected by the 2014 Board of Professional Affairs (BPA). Members of the 2014 BPA were Stewart E. Cooper, PhD, ABPP; Karen S. Budd, PhD; A. J. Franklin, PhD; Patricia Arredondo, EdD; Helen L. Coons, PhD, ABPP; Vickie M. Mays, PhD, MSPH; Linda A. Reddy, PhD; Celiane M. Rey-Casserly, PhD; and Antonette M. Zeiss, PhD. AWARD FOR ...

Distinguished variables are variables present in the heads of the rules of a DATALOG (or PRO-LOG) program. Except for their relevance to a query, they are as undistinguished by previous works as others, introduced by resolution steps. What if the selection rule rst selects literals with at least one distinguished variable ? This paper is an attempt to answer this question. To do this, we rst de...