Does familiarity change in the revelation effect?

The revelation effect describes the increased tendency to call items "old" when a recognition judgment is preceded by an incidental task. Past findings show that d' for recognition decreases following revelation, evidence that the revelation effect is due to familiarity change. However, data from receiver operating characteristic curves from 3 experiments produced no evidence of changes in recognition sensitivity. The authors illustrate how the use of a single-point measure like d' can be misleading when familiarity distribution variances are unequal. Also investigated was whether the effect depends on the revelation materials used. Neither the memorability of the revelation items, their similarity to recognition probes, nor the difficulty of the task changed the size of the effect. Thus, the revelation effect is not the result of a memory retrieval mechanism and seems to be generic and all-or-nothing. These characteristics are consistent with response bias rather than familiarity change.