IFIBA   22255
INSTITUTO DE FISICA DE BUENOS AIRES
Unidad Ejecutora - UE
artículos
Título:
Variance misperception explains illusions of confidence in simple perceptual decisions
Autor/es:
ARIEL ZYLBERBERG; PIETER R. ROELFSEMA; SIGMAN, MARIANO
Revista:
CONSCIOUSNESS AND COGNITION
Editorial:
Elsevier
Referencias:
Año: 2014 vol. 27 p. 246 - 253
ISSN:
1053-8100
Resumen:
Confidence in a perceptual decision is a judgment about the quality of
the sensory evidence. The quality of the evidence depends not only on
its strength (?signal?) but critically on its reliability (?noise?), but
the separate contribution of these quantities to the formation of
confidence judgments has not been investigated before in the context of
perceptual decisions. We studied subjective confidence reports in a
multi-element perceptual task where evidence strength and reliability
could be manipulated independently. Our results reveal a confidence
paradox: confidence is higher for stimuli of lower reliability that are
associated with a lower accuracy. We show that the subjects?
overconfidence in trials with unreliable evidence is caused by a reduced
sensitivity to stimulus variability. Our results bridge between the
investigation of miss-attributions of confidence in behavioral economics
and the domain of simple perceptual decisions amenable to neuroscience
research.