American Board of Radiology computer test center.

In 1997, the American Board of Radiology (ABR) determined to develop a computer-based examination and to create a test center for administration of computer-based examinations. In implementation of its plan, the Board has developed a flexible examination platform, well-adapted to the graphics needs of an image-based examination, and at the same time, compatible with test centers being developed by other medical specialty boards in terms of hardware, software, and candidate surroundings. A test center for secure proctored examination of up to 33 candidates has been created at the Board's headquarters in Tucson, AZ. The decision of the ABR to employ computer-based testing as a part of its recertification process represents an important step of significance to the entire field of radiology, embracing methods that are rapidly becoming integral to the practice of radiology in the acquisition, display, and management of diagnostic imaging information.

Cross-modal discrepancies in coarticulation and the integration of speech information: the McGurk effect with mismatched vowels.

Two experiments examined the impact of a discrepancy in vowel quality between the auditory and visual modalities on the perception of a syllable-initial consonant. One experiment examined the effect of such a discrepancy on the McGurk effect by cross-dubbing auditory /bi/ tokens onto visual /ga/ articulations (and vice versa). A discrepancy in vowel category significantly reduced the magnitude of the McGurk effect and changed the pattern of responses. A 2nd experiment investigated the effect of such a discrepancy on the speeded classification of the initial consonant. Mean reaction times to classify the tokens increased when the vowel information was discrepant between the 2 modalities but not when the vowel information was consistent. These experiments indicate that the perceptual system is sensitive to cross-modal discrepancies in the coarticulatory information between a consonant and its following vowel during phonetic perception.