Purpose: The spatiotemporal index (STI) is a widely used approach for measuring speech
pattern stability across multiple repetitions of a stimulus. In this study, we examine how …

Recent procedures have been developed that allow the analysis of gestural stability across
repetitions of phrase-length utterances by linearly normalizing aspects of the articulatory …

Purpose: The spatiotemporal index (STI) is a standard metric for quantifying the stability and
patterning of speech movements. The STI has often been applied to individual speech …

Speech requires the control of complex movements of orofacial structures to produce
dynamic variations in the vocal tract transfer function. The nature of the underlying motor …

Articulatory kinematics were analyzed to determine if adults who stutter are generally poorer
at speech movement pattern generation and if changing speech rate affects their stability in …

Purpose The spatiotemporal index (STI) is one measure of variability. As currently
implemented, kinematic data are used, requiring equipment that cannot be used with some …

The purpose of the present study was to investigate the impact of utterance length and
syntactic complexity on the speech motor stability of adults who stutter. Lower lip movement …

The degree of speech movement pattern consistency can provide information about speech
motor control. Although tongue motor control is particularly important because of the …

In speech research, it is often desirable to assess quantitatively the variability of a set of
speech movement trajectories. This problem is studied here using synthetic trajectories …

Smith's spatio-temporal index (STI) is widely used to assess variability in motor timing
performance in various speaking conditions. STI has been shown to be a sensitive index of …