Three ten-step series of synthetic speech stimuli were constructed: /raem/ to laem/, /raem/ to /waem/, and /laem/ to /yaem/. Within each series, differences consisted of variations in onset frequency and slope of transition in the second or third formant. These stimuli were presented to 5- to 7-year-old children in identification (picture-pointing) and 3-step same-different discrimination tasks. Two groups of subjects were tested: children having normal articulation, and children who misarticulated /r/ or /l/. Results support the view that some articulation-disordered children exhibit correlated perceptual deficits. (Author)