Health TrialsbyHealthPanel

Information Processing Biases in Adults Who Stutter

ConditionStuttering, Adult
Trial statusRecruiting
Trial phaseNot applicable
Trial typeInterventional
Biological sexAll
Age18-65
SponsorUniversity of Memphis

About this trial

The goal of this clinical trial is to examine whether stuttering is associated with a tendency to attend more quickly or for longer durations to threat-related information in the environment (threat-related attention bias). The main questions it aims to answer are:

Do adults who stutter, relative to adults who do not stutter, attend to threat-related stimuli more than neutral information? Are attentional biases observed across different types of threat or are they specific to threats related to stuttering experiences? Do measures of attention bias explain individual differences in psychological reactions among adults who stutter?

Eligibility criteria

This trial accepts healthy volunteers

Qualifiers

Speaks English as their primary language

Normal hearing (based on pure tone screening)

Normal or corrected vision (based on report)

Normal color vision (based on Ishihara Test, Concise Edition)

Disqualifiers

Reported significant medical history

Psychological or emotional disorder

History of frank neurological injury

Known speech, language, or learning disorder(s) other than stuttering

Trial design

Design model

Single group

Treatments tested in this trial

  • Threat-related stimulus exposure

    Behavioral

    Participants will view threat-related stimuli (words or faces) paired with nonthreat matches in three related experimental paradigms.

Treatment groups

80 Participants
are divided into 1 treatment group
Group A: Eye tracking tasksExperimental treatment 1 intervention

Trial outcomes

Primary outcomes

1

Reaction time (RT) measures

A) A key outcome measure from the dot-probe task will consist of RTs for congruent trials (in which probe appears in the location of threat stimulus) vs. incongruent trials (probe replaces neutral stimulus). (B) Key outcome measure from the emotional Stroop will include RT for threat vs. neutral words.

Time frame
Trial duration (maximum of 10 seconds)
2

Total dwell time on threat

This primary (and most reliable) index of AB will be extracted from eye movement data and represents the total duration of all fixations to areas of interest with threat stimuli for each trial of the free-viewing task.

Time frame
Trial duration (8 seconds)

Secondary outcomes

1

Eye tracking indices of AB

Additional indices of AB will be extracted from eye movement data and examined in exploratory manner: (1) probability of first fixation to an area of of interest (AOI), (2) first fixation latency, (3) first fixation duration, 4) first-run dwell time (representing summed duration of all fixations to an AOI from the first fixation until the AOI is exited), and (5) second-run dwell time (summed duration of all fixations within an AOI from the second time the AOI is entered until it is exited).

Time frame
Trial duration (8 seconds)

Other outcomes

Sponsors and contacts

Click on the lead sponsor to view all of their trials.

University of Memphis

Lead sponsor

University of Alabama, Tuscaloosa

Collaborator

Source ClinicalTrials.gov
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