Citation

Srinivasan NK, Carrell TD. J. Acoust. Soc. Am. 2010; 127(3): 1904.

Affiliation

Commun. Disord., Barkley Memorial Ctr., Univ. of Nebraska-Lincoln, Lincoln, NE 68583.

Copyright

(Copyright © 2010, American Institute of Physics)

DOI

10.1121/1.3384781

PMID

20330727

Abstract

The relationship between speech intelligibility and simultaneous task performance was investigated in the present experiments. Specifically, the following indicators were measured: intelligibility, reaction time for word repetition, visual-motor performance, cognitive load, and visual word recall. These relationships were measured using natural, synthetic, and cell phone speech. It is clear from other reports that different patterns of results may be expected from different types of speech signals [Pisoni et al. (1985)]. Intelligibility was based on participant's accuracy in repeating the final word of a sentence. Visual-motor performance was measured as the average speed of rotation in adaptive pursuit rotor task [Srinivasan and Carrell (2007)]. Task load was measured using the NASA-TLX instrument [Hart and Staveland (1988)]. TLX was highly correlated with the simultaneous pursuit rotor task in the cell phone listening condition (r = 0.41, p < 0.0001). However, the pursuit rotor measure consistently demonstrated much lower variability than the TLX score. Perception was also measured in two attention conditions, consistent-mapping and variable-mapping [Schneider and Schiffrin (1977)]. In the consistent-mapping condition, cell-phone speech led to better performance at the pursuit rotor task than natural speech, whereas in the variable-mapping condition, the natural speech led to better performance.

Language: en