Syllable effects in a fragment-detection task in italian listeners

Area of Science:

• Psycholinguistics
• Auditory Perception
• Speech Processing

Background:

• Previous research (Mehler et al., 1981) established the importance of monitoring studies in speech perception.
• Understanding how listeners process syllable structure and stress in spoken language is crucial for developing accurate speech perception models.

Purpose of the Study:

• To investigate the influence of initial syllable type (CV, CVC, CVG) and stress on auditory target detection in Italian listeners.
• To examine the role of experimental design, specifically the use of catch trials, in revealing syllable effects in speech perception.

Main Methods:

• Italian listeners detected auditory consonant-vowel (CV) and consonant-vowel-consonant (CVC) targets within carrier words.
• Experiments manipulated the initial syllable type (CV, CVC, CVG) and stress patterns of carrier words.
• Reaction times (RTs) were measured, and both catch and foil trials were employed in the first experiment, with catch trials removed in the second.

Main Results:

• A significant syllable effect on target detection was observed in the first experiment, modulated by listener speed and stress location.
• This syllable effect disappeared in the second experiment when catch trials were omitted, despite similar RTs.
• Listener's speed and stress location influenced the detection of speech sounds.

Conclusions:

• The presence of a syllable effect is sensitive to the experimental paradigm, particularly the inclusion of catch trials.
• Findings provide insights into the language transparency hypothesis and the processing of pivotal consonants.
• The results are discussed in the context of the resonance-based Adaptive Resonance Theory (ART) model of speech perception.