Erratum

Errata

This article corrects:

  1. BEHAVIORAL MOMENTUM THEORY: EQUATIONS AND APPLICATIONS Volume 44, Issue 4, 877–895, Article first published online: December 2011

Nevin, J. A., & Shahan, T. A. (2011). Behavioral momentum theory: Equations and applications. Journal of Applied Behavior Analysis, 44, 877–895.

The simulations portrayed in Figures 11 and 13 of Nevin and Shahan (2011) were based on calculations that differed from the other simulations in that article. Specifically, Figures 11 and 13 employed e, the base of natural logarithms, whereas all other simulations employed 10, the base of common logarithms (see Nevin & Shahan, 2011, p. 879, Footnote 3). Corrected figures with base 10, displayed below, have lower y-axis values than the published figures. However, the ordinal effects of reinforcer schedules on behavioral predictions are unchanged from those shown in the original figures and discussed in the text.

Figure 11.

Predictions of Equation 7 for rich (120 per hour) and lean (15 per hour) schedules of DRA during extinction, showing that reductions in proportion of baseline are directly related to the rate of DRA. When DRA is discontinued, response rate is predicted to increase (resurgence), and the magnitude of the increase is directly related to the rate of DRA. Adapted from Shahan and Sweeney (2011).

Figure 13.

Predictions of Equation 7 showing the effects of low-rate DRA (30 per hour, top) and high-rate DRA (240 per hour, bottom) during extinction following training with a rich VI (120 per hour) as opposed to a lean VI schedule (30 per hour) for a target response during baseline. As in Figure 11, resurgence is predicted to be greater when a rich DRA schedule is discontinued, regardless of preextinction reinforcer rates.

We are indebted to Wayne Fisher for pointing out the discrepancies between the proper simulations and the published figures.

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