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Full-Text Articles in Social and Behavioral Sciences
Stimulus Statistics Change Sounds From Near-Indiscriminable To Hyperdiscriminable, Keith Kluender R., Christian E. Stilp
Stimulus Statistics Change Sounds From Near-Indiscriminable To Hyperdiscriminable, Keith Kluender R., Christian E. Stilp
Department of Speech, Language, and Hearing Sciences Faculty Publications
Objects and events in the sensory environment are generally predictable, making most of the energy impinging upon sensory transducers redundant. Given this fact, efficient sensory systems should detect, extract, and exploit predictability in order to optimize sensitivity to less predictable inputs that are, by definition, more informative. Not only are perceptual systems sensitive to changes in physical stimulus properties, but growing evidence reveals sensitivity both to relative predictability of stimuli and to co-occurrence of stimulus attributes within stimuli. Recent results revealed that auditory perception rapidly reorganizes to efficiently capture covariance among stimulus attributes. Acoustic properties per se were perceptually abandoned, …
Efficient Coding And Statistically Optimal Weighting Of Covariance Among Acoustic Attributes In Novel Sounds, Keith Kluender R., Christian E. Stilp
Efficient Coding And Statistically Optimal Weighting Of Covariance Among Acoustic Attributes In Novel Sounds, Keith Kluender R., Christian E. Stilp
Department of Speech, Language, and Hearing Sciences Faculty Publications
To the extent that sensorineural systems are efficient, redundancy should be extracted to optimize transmission of information, but perceptual evidence for this has been limited. Stilp and colleagues recently reported efficient coding of robust correlation (r =. 97) among complex acoustic attributes (attack/decay, spectral shape) in novel sounds. Discrimination of sounds orthogonal to the correlation was initially inferior but later comparable to that of sounds obeying the correlation. These effects were attenuated for less-correlated stimuli (r =. 54) for reasons that are unclear. Here, statistical properties of correlation among acoustic attributes essential for perceptual organization are investigated. Overall, simple strength …