Abstract
Effect of the stimulus magnitude on the confidence of psychophysical judgments. Eventhough quantitative judgments are clearly affected by non-sensory factors, the principal component of the response variance has always being sensory magnitudes (Garriga-Trillo, 1992; Baird, in press). Olsson & Winman (1996) have found that confidence judgments on detection responses are affected by stimulus characteristics. Confidence judgments of quantitative responses have not been studied on this issue. This work studies if the stimulus magnitude influences confidence judgments of quantitative psychophysical responses considering a line length estimation and a time duration task. Independent of the sensory modality involved, mainly, there are no significant differences between the confidence distributions for each stimulus. Metajudgments of confidence in estimation tasks are not affected by stimulus magnitude. This could favor, within the two-process theory, the cognitive nature of confidence judgments.
