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			Volume 24, 2006 (ongoing issue) (see Volume 23, 2005 below) STUDENT PAPER WINNERS (ABSTRACTS) Michael A. Magoon Response-consequence Contingency Discriminability when Positive and Negative Reinforcement Compete in Concurrent Schedules September 25, 2005 (Read On-Line) (DownloadTwo-Column Reprint.pdf) Christine M. Engle Aging and Categorization: Using Generalized Equivalence Classes and their Characteristics to Compare Older and Younger Adults September 25, 2005 (Read On-Line) (DownloadTwo-Column Reprint.pdf) BRIEF REPORTS Manish Vaidya and Kimberly N. Smith Delayed matching-to-sample training facilitates derived relational responding November 22, 2006 (Read On-Line) (DownloadTwo-Column Reprint.pdf)   Wagner R. da Silva, Deisy das Graças de Souza, Julio C. de Rose, Jair Lopes Jr., Maria Cecília Bevilacqua, and William J. McIlvane Relational learning in children with cochlear implants February 6, 2006 (Read On-Line) (DownloadTwo-Column Reprint.pdf) Volume 23, 2005 STUDENT PAPER WINNERS (ABSTRACTS) Caio Miguel and Anna Ingeborg Petursdottir The effects of multiple tact and receptive-discrimination training on acquisition of intraverbal behavior September 25, 2005 (Read On-Line) (DownloadTwo-Column Reprint.pdf) Anna Ingeborg Petursdottir Functional interdependence of mands and tacts in preschool children September 25, 2005 (Read On-Line) (DownloadTwo-Column Reprint.pdf) David Sidener Precurrent behavior and mediation of delayed matching to sample: systematic replication of extension September 25, 2005 (Read On-Line) (DownloadTwo-Column Reprint.pdf) Benigno Alonso-Álvarez Emergence of complex conditional discriminations by joint control of compound samples September 25, 2005 (Read On-Line) (DownloadTwo-Column Reprint.pdf) RESEARCH IN PROGRESS Mónica Rodríguez-Mori and Luis Antonio Pérez-González A simple procedure to teach conditional discriminations to children September 25, 2005 (Read On-Line) (DownloadTwo-Column Reprint.pdf)