This study evaluated the inclusion of uncoded segments in the Dyadic Parent-Child Interaction Coding System, an analogue observation of parent-child interactions. The relationships between warm-up and coded segments were assessed, as well as the segments' associations with parent ratings of parent and child behaviors. Sixty-nine non-referred parent-child dyads engaged in the observation. Parents completed measures about their parenting and children's behaviors. Significant differences were observed between the first situation's warm-up and coded segments, whereas minimal differences were found for the second situation. Findings suggest that the second warm-up segment may not be necessary for optimal assessment of parent-child interactions. (Contains 4 tables.)