ÿþ<?PHP $ShowAll = true; require_once("../../../jeab/login/check_auth_user.php"); $isLibSubscript = CheckLibSub(); //Library Subscription? if (is_string($isLibSubscript)) { $isLoggedin = true; //Yes Lib Subscription, pretend we're logged in. }else{ $isLoggedin = check_auth_user(); // Check Individual user logged in. } ?> <HTML> <head> <TITLE>Within&#45;subject reversibility of discriminative function in the composite&#45;stimulus control of behavior. </TITLE> <meta name="Title" content="Within&#45;subject reversibility of discriminative function in the composite&#45;stimulus control of behavior."> <meta name="Author" content="Weiss, S.J., Kearns, D.N. &AMP; Antoshina, M."> <meta name="Volume" content="92"> <meta name="Number" content="03"> <meta name="StartPage" content="0367"> <meta name="Pages" content="367-377"> <meta name="Year" content="2009"> <meta name="JournalNameShort" content="JEAB"> <meta name="JournalName" content="Journal of Experimental Analysis of Behavior"> </head> <body> <?PHP if (is_string($isLibSubscript) ) { echo "$announceSubscription <i>$isLibSubscript</i> <br>"; } ?> <?PHP if (($isLoggedin) || ($ShowAll)) { ?> <A HREF="/jeab/articles/2009/jeab-92-03-0367.pdf"> <IMG SRC="/pics/viewFullArticle.gif" BORDER="0"> </A> <?PHP } else { ?> <a href="/jeab/login/login.php"><IMG SRC="/pics/subscribe_or.jpg"></a> <?PHP } ?> <H2> Weiss, S.J., Kearns, D.N. &AMP; Antoshina, M. (2009). Within&#45;subject reversibility of discriminative function in the composite&#45;stimulus control of behavior. <i> Journal of the Experimental Analysis of Behavior, </i> <B>92</B>, 367-377.</H2> According to the composite&#45;stimulus control model &#40;Weiss, 1969, 1972b&#41;, an individual discriminative stimulus &#40;SD&#41; is composed of that SD s on&#45;state plus the off&#45;states of all other relevant SDs. The present experiment investigated the reversibility of composite&#45;stimulus control. Separate groups of rats were trained to lever&#45;press for food whenever a tone or a light SD was present. For one group, the nonreinforced S" condition was tone&#45;and&#45; light absence &#40;T_+L_&#41;. Tone&#45;plus&#45;light &#40;T+L&#41; was S" in the other group. On a  stimulus compounding test that recombined composite elements, maximum responding occurred to that composite consisting only of elements occasioning response increase. That was T+L for the group trained with T_+L_ as S" and T_+L_ for the group trained with T+L as S". The S" composite was next reversed over groups, and in testing maximum responding of a comparable magnitude to that of Phase 1, was again controlled by the composite consisting only of elements most recently occasioning response increase&#95;whether T+L or T_+L_. The inhibitory conditioning history of both composite&#45;elements currently occasioning responding did not weaken the summative effect. These results confirm and extend Weiss s composite&#45;stimulus control model, and demonstrate that such control is fully reversible. We discuss how translating conditions of the stimulus&#45;compounding paradigm to a composite continuum creates a functional and logical connection to intradimensional control measured through stimulus generalization, reducing the number of different behavioral phenomena requiring unique explanations. <P> Key words: composite&#45;stimulus control, reversal learning, stimulus compounding, additive summation, composite&#45;stimulus recombination test, stimulus generalization peak shift, rats</body> </HTML>