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Guntupalli, Everhart, Kalinowski, Nanjundeswaran and Saltuklaroglu found an increase in skin conductance and lower mean heart rate when participants view persons who stutter compared to persons who do not stutter (2007). We will be measuring participants' physiological responses to a series of videos using the following apparatuses: electromyograph (EMG), electrocardiogram (EKG) and galvanic skin response (GSR). In addition to measuring arousal, we will be measuring recall to ascertain if there is a difference in recall in hearing stories told by persons who stutter compared to persons who do not stutter. Watch us hook up Dr. Ainsworth HERE!
The purpose of this research is to compare if any, differences in executive functioning between people who stutter (PWS), people who used to stutter (PWUS), and people who do not stutter (PWNS). Previous studies have shown that participants who stutter demonstrated a significant increase in disfluency when a verbal component was involved in the task (Stroop test) compared to non-stutterers (Bosshardt, 2009; Subramanian & Yairi, 2005). In addition, preliminary results from a previous study using the (WCST) Wisconsin Card Sorting Task (Grant & Berg, 1981) showed that there were no differences between stutterers and non-stutterers, however, stutterers still self-reported having perceived cognitive deficits (Ainsworth, 2010). We hypothesize that PWS will perform significantly worse than PWNS on a range of cognitive tasks.
Speed dating procedures are strong in ecological validity, therefore how an individual behaves and make decisions while speed dating is strongly impacted by their real romantic prospects. Speed dating allows researchers to study both members of multiple dyads while they are communicating and forming impressions. As speed dating allows for the study of early impression formation and attraction we plan to utilize this testing paradigm to investigate how stuttering may affect these interactions. We hypothesize stutters will be viewed as less attractive in first encounters then when he/she does not stutter. This project is part of a larger investigation aimed at understanding the impact that stuttering has on both the person who stutters and potential listeners of stuttered speech. This study will help shed some light as to the effects that speech disfluency has on other aspects of social encounters.
This study will try to isolate processing fluency (the ease of processing information) for listeners of people who stutter. It is hypothesized that since stuttering isdisfluent speech, it will be processed at a perceptual level disfluently, leading to lower judgments of the target (e.g., perceptions of truth). Our objective is to determine if listeners rate people who stutter as less truthful because of their difficulty in processing their speech.
The APL is committed to utilizing the application of advanced statistical methods and measurement models to furthering our understanding of psychological phenomenon. As a psychometrics and statistical laboratory we work as consultants for a multitude of psychological research studies in addition to conducting independent research of our own in a number of areas (e.g.,social, personality, clinical).
