Fig. 3.

Overall means and standard errors of the basic (lower sets of symbols) and successive (upper sets of symbols) magnitude productions made by all 20 participants in the 12 experimental conditions. The entries on the abscissa denote the different types of instructions given (e.g., ×1×6: making a match on the other dimension first, and then a cross-modal magnitude production resulting in six times the subjective magnitude). Red symbols refer to adjustments of sound pressure level (left ordinate); blue symbols to adjustments of luminance (right ordinate). Naturally, the two types of outcomes cannot be compared directly. The initial magnitude productions originated from a reference sound pressure level of 40 dB(A) and a reference luminance level of 1.66 cd/m² (dashed line). Each data point is based on 280 adjustments