Variability and sequential effects in magnitude production and estimation of auditory intensity

Magnitude production and estimation data from the same subjects are analyzed in three ways. The coefficient of variation of the ratio of successive responses Inumbers in estimation, SPL in production) are compared; both exhibit, as a function of stimulus difference, the V-shaped pattern previously found in estimation data. A multiple regression of responses on the stimulus and on these events of the previous trial exhibit similar patterns, although the effects of the previous trial in production are somewhat less. The correlation between successive responses, averaged over constant stimulus differences, are very large for small differences and about zero for large ones. These somewhat surprisng results for production are examined from the point of view of an intensity attention band hypothesis.