We carried out a series of experiments on verbal short-term memory for lists of words. In the first experiment, participants were tested via immediate serial recall, and word frequency and list set size were manipulated. With closed lists, the same set of items was repeatedly sampled, and with open lists, no item was presented more than once. In serial recall, effects of word frequency and set size were found. When a serial reconstruction-of-order task was used, in a second experiment, robust effects of word frequency emerged, but set size failed to show an effect. The effects of word frequency in order reconstruction were further examined in two final experiments. The data from these experiments revealed that the effects of word frequency are robust and apparently are not exclusively indicative of output processes. In light of these findings, we propose a multiple-mechanisms account in which word frequency can influence both retrieval and preretrieval processes.Keywords Serial recall . Reconstruction of order . Verbal short-term memory . RedintegrationOne of the most well-known techniques for studying verbal short-term memory is to present a short list of words to a person and then get the person to report back the words in the order in which they were presented. This is known as the immediate serial-recall task. To perform well in the task, participants must remember both the actual words (i.e., the items) and the order in which the words occurred. Many models of short-term memory, as defined relative to immediate serial recall, incorporate distinct mechanisms for maintaining the two types of information (e.g., Brown, Neath, & Chater, 2007;Brown, Preece, & Hulme, 2000;Burgess & Hitch, 1992;Farrell & Lewandowsky, 2002;Henson, 1998;Page & Norris, 1998), and it has been suggested that different brain regions are involved in dealing with these two forms of memory (Majerus, 2009). In this vein, attempts have been made to establish whether different factors differentially influence memory for item versus order information. For example, it has often been suggested that the deleterious effect of having similar-sounding words within a list selectively disrupts memory for the order of the items (e.g., Baddeley, 1986).In order to align the effects of other variables with the operations of specific mechanisms in models of memory, other tasks have also been used, and the present concerns are with something known as the order reconstruction task. In this task, the to-be-remembered (TBR) words that have just been presented are re-presented at test in a new random order, and the participant attempts to reconstruct the order of the words' presentation. A simple assumption is that the order reconstruction task is nothing other than a test of item order information, or, as Whiteman, Nairne, and Serra (1994) stated, the reconstruction task Bprovides a relatively pure index of position memory^ (pp. 276-277).To investigate such a possibility, Whiteman et al. (1994) manipulated word frequency-a variable that reflects item k...