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This study examined the hypothesis that adults with stroke and oropharyngeal dysphagia (swallowing dysfunction) would exhibit immediate improvements in selected parameters of swallowing in response to a carbonated stimulus vs. thin, nectar-like, and honey-like thickened liquids. The experiment was designed to replicate previous work with methodological improvements. Fourteen adults with stroke were enrolled in this prospective study. Participants were observed swallowing various stimuli under videofluoroscopy. Measures and ratings of stage transition duration (STD), pharyngeal transit time (PTT), pharyngeal residue (PR), penetration and aspiration (PENASP) and bolus position at the onset of the swallow (BPOS) were recorded.