Correcting the correction of conditional recency slopes.

Farrell (Journal of Experimental Psychology: Learning, Memory, and Cognition, 36, 324-347, 2010) presented some analyses of free recall data that suggest that recency items initially become more accessible as recall progresses, in contrast to the assumptions of temporal drift models. Moran and Goshen-Gottstein (2013) present some challenges to Farrell's (2010) analyses of the change in conditional recency across output position in free recall. Simulations using a very basic free recall model that controls conditional recency across recall show that Farrell's (2010) analyses are not substantially biased, while the procedure proposed by Moran and Goshen-Gottstein introduces a substantial underestimation of the true slopes. The null slopes observed in immediate recall by Moran and Goshen-Gottstein are not informative of the true slopes characterizing the data. Accordingly, Farrell's (2010) results continue to present a challenge to temporal drift models.