Mean jaw spatiotemporal index (STI) and standard error associated with the production of Pop, puppet, and puppypop by participants in the childhood apraxia of speech (CAS), speech delay characterized by an articulation/phonological impairment (SD), and typical development (TD) groups. Number of participants included for the tokens Pop, puppet, and puppypop, respectively: CAS = 11, 10, and 8; SD = 11, 11, and 9; TD = 11, 11, and 10.