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  • Title: Effects of initial-link duration on preference and resistance to change in concurrent-chains schedules.
    Author: Jimenez-Gomez C, Podlesnik CA, Shahan TA.
    Journal: Behav Processes; 2009 Jun; 81(2):223-6. PubMed ID: 19429215.
    Abstract:
    Previous studies with concurrent-chains procedures have shown that preference for a terminal-link signaling a higher reinforcement rate decreases as initial-link durations increase. Using a concurrent-chains procedure, the present experiment examined the effects of manipulating initial-link duration on preference and resistance to disruption with rats nose poking for different rates of food reinforcement in the terminal links. Consistent with previous findings, preference for a terminal link with a higher reinforcement rate decreased with longer initial links. Conversely, relative resistance to disruption in the terminal link with a higher reinforcement rate increased with longer initial links. These findings are counter to the prediction of behavioral momentum theory that preference and resistance to change should be positively related.
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