There was no significant effect when the target was a no-onset item, F < 1, but a highly significant effect when the target was an onset, F (4, 84) = 16.18, p < 0.001: RTs increased on average by 103 ms from one onset to six onsets.
A 2 × 6 repeated measures ANOVA with the factors target type (no-onset, onset) and number of onsets (1, 2, 3, 4, 5, or 6 items) revealed a marginally significant main effect for target type, F (1, 11) = 4.78, p = 0.051, due to the somewhat higher error rate with no-onset targets than with onset targets (3.7 vs. 2.7%, respectively).
However, in comparison to Experiment 1, these differences between the 1–2-tag and the 2–8-tag models did not reach statistical significance.