The Purpose of this study in to find sequencing effects on RPT. For the test, the 18 subjects was involved in a serial finger tapping tasks. The tasks orgarnized by the four sequences (12-12, 12-123, 123-12, 123-123). The experiment executed by the within-subjects design on sample reaction time paradigm. The analysis of RTs for the four sequencing patterns conducted by the 2 × 2 ANOVA. The results are as fallow : 1. The significant interaction appeared between the two sequence patterns (12-12 and 123-123 VS.12-123 and123-12) [F_(1.68) = 5.78, P< .05]. 2. No statistical difference in produced between the repeated sequences (12-12 VS. 123-123) [ t_(1.34) = 0.27, P < .05]. 3. The significant difference in produced between the mixed sequences (12-123 VS. 123-12) [t_(1.34) = 3.02, p< .05] 4. The response profile represents the long-short. long-short-short patterns. 5. The degree of response complexity increase with the number of response unit and the different sequencing conditions. 6. The different sequencing effects affected the length of RPT.