 It should be noted that the value of applying magnitude estimation to the judgment of acceptability has been directly challenged in two recent papers. Weskott and Fanselow (2011) and Sprouse (2011) both present critiques of Bard et al. (1996). Weskott and Fanselow compared magnitude estimation data to standard judgments on binary and 7-point scales, and claim that magnitude estimation does not yield more information than other judgment tasks, and moreover can produce spurious variance. And Sprouse, on the basis of recent formalizations of magnitude estimation in the psychophysics literature, presents experimental evidence that participants cannot make ratio judgments of acceptability (for example, a judgment that one sentence is precisely half as acceptable as another), which suggests that the magnitude estimation task probably provides the same interval-level data as other judgment tasks.