Perception of two vowel contrasts by rats: Discrimination of natural tokens

TitlePerception of two vowel contrasts by rats: Discrimination of natural tokens
Publication TypeJournal Article
Year of Publication2005
AuthorsPons F, Toro JM, Trobalón JB
JournalCognitiva
Volume17
Pagination173–181
Date Publishedsep
ISSN02143550
Abstract

Phoneme perception by different animal species has usually been studied using isolated syllables, vowels or consonants, providing striking similarities in the results between humans and animals. Nevertheless, the extent to which these similarities are also found in the processing of more complex nature-like stimuli is still a topic of debate. In this manuscript we present two experiments on the perception of vowel contrasts by rats. We used naturally produced speech by multiple speakers, consisting of a series of tokens of three different nonsense words that contained a target vowel. In Experiment 1, rats could differentiate between different tokens of the word [dedi] from tokens of the word [dudi] . In Experiment 2, this differentiation was also found between tokens of words containing closer vowels such as [dodi] and [dudi] . Results show that rats can normalize across different features of natural speech, and that they can perceive vowel contrasts that are embedded in words. La percepción fonética ha sido estudiada en diferentes especies animales usando s\'ılabas aisladas, vocales o consonantes, proporcionando varios resultados similares entre humanos y animales. Sin embargo, la medida en que estas similitudes se encuentran en el procesamiento de est\'ımulos naturales más complejos es todav\'ıa un tema de debate. En este manuscrito presentamos dos experimentos sobre la percepción de distintos contrastes vocálicos en ratas. Se usaron tres pseudopalabras, producidas por varias locutoras, que conten\'ıan el contraste a estudio. En el Experimento 1 las ratas pudieron diferenciar diferentes ejemplares de la pseudopalabra [dedi/ de ejemplares de la pseudopalabra [dudi/. En el experimento 2, esta discriminación fue también observada en pseudopalabras que conten\'ıan vocales más cercanas: [dodi] y [dudi] . Los resultados muestran que las ratas pueden normalizar a través de diferentes caracter\'ısticas del habla natural, y que son capaces de percibir contrastes vocálicos dentro de palabras.

URLhttp://www.ingentaconnect.com/content/fias/cog/2005/00000017/00000002/art00005