Hindi Dental-Retroflex Categorization

Platform: HTML · English, German, French · verified 66d ago

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Description

A phonetic categorization task where participants learn to distinguish Hindi dental and retroflex consonant sounds. The task involves 540 trials across multiple training levels with increasing difficulty. Participants listen to Hindi speech sounds and categorize them, receiving feedback to improve their perception of this non-native phonetic contrast. The task assesses auditory perceptual learning and phonetic category formation.

Contact & Lab

Lab

Brain and Language Lab

brainandlanguagelab.org

Principal investigator

Narly Golestani

University of Geneva

Task contact

narly.golestani@unige.ch

Contributors

Narly Golestani

University of Geneva

Conceptualization

Supervision

Citation

No citation available — contact the task author.

Credits

No credits provided.

Domains

Auditory Processing

Learning

Psycholinguistics

Part of suite:

NEBULA101

Target Population

Age Categories

young adults

middle age

Clinical Status

non-clinical

Additional Notes

Healthy adults

Languages

English

German

French

Run under

Engine

HTML / JavaScript

Format

Online (browser)

Modalities

behavioral

Task Outputs

What it measures

Auditory perceptual learning of non-native phonetic contrasts (Hindi dental vs. retroflex)

Output formats

csv

Browser-downloadable CSV, one row per trial

json

Browser-downloadable JSON, array of trial objects

Experimental design

Trial-based

540 trials

Within-subject: consonant type (dental, retroflex), training level (1-5)

Conditions

consonant_type

dental

retroflex

— Hindi consonant place of articulation

training_level

— Progressive difficulty with speaker variability

Key measures for analysis

Accuracy by consonant type and training level
Mean RT by consonant type and training level
Learning slope: accuracy improvement across levels 1-5

Recorded variables

Variable	Role	Type	Description	Unit
`trial_number`	metadata	number	Trial number	-
`level`	independent	number	Training level Values: 1, 2, 3, 4, 5	-
`stimulus_file`	independent	string	Audio stimulus file played	-
`selected`	dependent	string	Participant's category selection Values: dental, retroflex	-
`correct_answer`	independent	string	Correct category Values: dental, retroflex	-
`accuracy`	dependent	number	Whether the response was correct (1 or 0)	-
`rt_ms`	dependent	number	Reaction time	ms

Provenance

Source: nccr-seed

Fetched: 2026-02-16

Last verified: 2026-05-12 — passed

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Additional Information

Created Date

2026-02-16

Last Modified

2026-05-12