Procedural ReliabilityA procedural standard was developed for each phase of the investigation. The first author and a reliability coder were trained on all instructional procedures within the standard. Training contin- ued until the researcher and coder reached 90% compliance with the standard. Approximately 20% of the videotaped sessions for each partici- pant were randomly selected and evaluated by the second coder. Procedural reliability was evaluated as follows: number of steps correctly implemented divided by the number of steps correct, incorrect, and omitted. Mean reliability across sessions was 93% (range 91 – 100%), suggesting that the procedures were followed consistently.