“…A number of recent EPG studies confirm that, even in typical adults and children, there is a wide variation between speakers in EPG index values for any given target sound (Cheng, Murdoch, Goozee, & Scott, 2007;Gibbon, Yuen, Lee, & Adams, 2007;Liker & Gibbon, 2008;Liker, Gibbon, Wrench, & Horga, 2007;McLeod, Roberts, & Sita, 2006). For example, conducted a study on normal alveolar stops and found that although all the speakers produced similar "horse-shoe" spatial patterns for these targets, some speakers had more than twice as much contact as others.…”