Figure 3. Scatterplot showing the effects of VSTM load on detection sensitivity (high-load d′ minus low-load d′) and on memory capacity estimates (calculated using Cowan’s K [K = (hit rate − 0.5 + correct rejection − 0.5) * N], where K is the capacity estimate and N is the number of items presented in the memory set). The line represents the best linear fit. The increase in K with high load explained a significant proportion of variance in the reduction of detection sensitivity scores (R2 = .37), F(1, 13) = 7.51, p = .02.
