Assessing Perceptual Effects of Interactive Tasks

Not Applicable

Not yet recruiting

• Conditions: Amyotrophic Lateral Sclerosis

• Registration Number: NCT06828523
• Lead Sponsor: Penn State University

Brief Summary

In this study, we will evaluate how solo, naive listeners perceive the speech of people with amyotrophic lateral sclerosis (ALS) and age-matched speakers produced across interactive and non-interactive contexts with an unfamiliar, naive interlocutor.

Detailed Description

Listeners will hear recorded speech of PALS and age-matched speakers and indicate what they heard. Recorded speech consists of vowels and consonants produced in non-interactive and interactive tasks. The perceptual judgements will be compared to see whether interactive contexts have similar perceptual effects across the two groups.

Plans for Assignment - This is a single group study in which all participants will engage in the same tasks.

Delivery of Intervention: Solo listeners will participate in this study in a remote, asynchronous format. They will be recruited using the online participant recruitment platform Prolific © and will use their own laptop/computer and headphones.

Adequacy of Sample size: We will use n = 1300 listeners to achieve 80% power at alpha of .05 to detect between group differences with the assumption of medium effect sizes (Cohen's f = 0.3).

Adequacy of Analyses: The proposed statistical analyses (Generalized mixed effects regressions) are standard and will be used to analyze the effect of the intervention on the outcome measures described below.

Study Timeline

• Status Verified: 2025-02
• Study First Submitted: 2025-02-11
• Study First Submitted QC: 2025-02-11
• Last Update Submitted: 2025-02-11
• Study First Posted: 2025-02-14
• Last Update Posted: 2025-02-14
• Study Start: 2027-10-01
• Primary Completion: 2029-02-28
• Study Completion: 2029-02-28

Recruitment & Eligibility

• Status: NOT_YET_RECRUITING
• Sex: All
• Target Recruitment: 1300

Inclusion Criteria

• passing the remote hearing screening
• having no known speech, language or neurological disorders per self-report
• being a native monolingual speaker of American English
• having no experience communicating with people with dysarthria
• being between the ages of 18 and 65.

Exclusion Criteria

• None - if volunteer meets the inclusion criteria, then they will be enrolled

Study & Design

• Study Type: INTERVENTIONAL
• Study Design: SINGLE_GROUP

Primary Outcome Measures

Name	Time	Method
Intelligibility of recorded speech	one 20 minute session	Perceptual judgments will be provided by solo, naïve listeners who did not participate in the interactions. Listeners will hear recorded speech of PALS and age-matched speakers recorded across the different tasks and indicate what they heard. The score will be expressed in percent. The possible range is between 0-100%. The higher scores mean a better outcome.

Trial Locations

Locations (1)

Speech Core, Pennsylvania State University; 🇺🇸 University Park, Pennsylvania, United States