Welcome to the UCR Audiovisual Speech Web-Lab Demonstration Page

This website is designed to offer interactive demonstrations of audiovisual speech effects. At this site you can see demonstrations, run your own experiments, and learn about audiovisual speech perception.

Here is what you can expect: All the effects can be viewed on the Demonstration pages and on the Experiment pages. The Demonstration pages include descriptions of stimuli and explanations of the effects. The Experiment pages are designed to collect data on naive subjects, so no explanations are provided. For instructors and students interested in using the data for classroom assignments, we recommend performing the experiments, looking at the resultant data, and then going to the associated demonstration page.

Many of the phenomena are presented using Quicktime movies. While most of these movies are not very large, they may pose some problems for modems 56k or slower.

Here is what you will learn: This site is devoted to phenomena of visual and audiovisual speech perception. Visual speech perception is the recognition of speech information from watching the articulators of a speaker's face. Visual speech perception is also known as lipreading and speechreading. Visual speech is used by hearing impaired individuals, as well as individuals with normal hearing. We all use visual speech information in noisy environments (a party, a loud restaurant) and when we're listening to a complicated message. Visual speech information also helps infants acquire language. Would you like to be convinced that you use visual speech? Then let's start with the McGurk Effect.