Multidimensional models and iconic decay: Reply to di Lollo and Dixon.
Geoffrey R. Loftus, Thomas A. Busey · Journal of Experimental Psychology Human Perception & Performance · 1992
We discuss two issues raised by Di Lollo and Dixon. First, we formalize the notion of «informational dimensionality» and demonstrate that Loftus's extraction-rate model is equivalent to Di Lollo and Dixon's «dual-decay model» with respect to dimensionality. Second, we describe how the extraction-rate model can be modified to apply it to 2 data sets reported by Di Lollo and Dixon. The major modifications involve (1) the assumption of capacity limitations in short-term memory and (2) the assumption of differential information-extraction rates prior to and after probe presentation in a partial-report paradigm. We demonstrate that although the model can account qualitatively for Di Lollo and Dixon's data, it cannot account for them quantitatively