The Effects of Age, Gender and Test Stimuli on Visual Speech Perception: A Preliminary Study

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Abstract
Introduction: To the best of our knowledge, there is a lack of reliable, validated, and standardized (Dutch) measuring instruments to document visual speech perception in a structured way. This study aimed to: (1) evaluate the effects of age, gender, and the used word list on visual speech perception examined by a first version of the Dutch Test for (Audio-)Visual Speech Perception on word level (TAUVIS-words) and (2) assess the internal reliability of the TAUVIS-words. Methods: Thirty-nine normal-hearing adults divided into the following 3 age categories were included: (1) younger adults, age 18–39 years; (2) middle-aged adults, age 40–59 years; and (3) older adults, age >60 years. The TAUVIS-words consist of 4 word lists, i.e., 2 monosyllabic word lists (MS 1 and MS 2) and 2 polysyllabic word lists (PS 1 and PS 2). A first exploration of the effects of age, gender, and test stimuli (i.e., the used word list) on visual speech perception was conducted using the TAUVIS-words. A mixed-design analysis of variance (ANOVA) was conducted to analyze the results statistically. Lastly, the internal reliability of the TAUVIS-words was assessed by calculating the Chronbach α. Results: The results revealed a significant effect of the used list. More specifically, the score for MS 1 was significantly better compared to that for PS 2, and the score for PS 1 was significantly better compared to that for PS 2. Furthermore, a significant main effect of gender was found. Women scored significantly better compared to men. The effect of age was not significant. The TAUVIS-word lists were found to have good internal reliability. Conclusion: This study was a first exploration of the effects of age, gender, and test stimuli on visual speech perception using the TAUVIS-words. Further research is necessary to optimize and validate the TAUVIS-words, making use of a larger study sample.

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