| This study presented sets of 15 multiplication facts to each of 4 third-grade participants. The items were presented by an iPod each session three times at three different time delays. When mastery was achieved on a set (80% correct across 3 consecutive sessions), the participant moved on to a new set. Generalization probes were administered consisting of some facts that were trained during intervention and some untrained facts at 2-week follow-up. In addition, maintenance probes were conducted of each set after a new set was mastered and at 4-week follow-up. Overall, excellent acquisition of facts was observed in 3 of the 4 participants. Intervention Effect Sizes ranged from 4.78 to 6.08 for all participants. Acquisition rates generalized well to a different worksheet 2 weeks following intervention, and maintained at rates much higher than baseline at 4-week follow-up. One of the 4 participants struggled to acquire the facts to begin with and was only able to master one set of facts. Consequently, generalization and maintenance was poor for this participant. |
