Figure 2.

The effect of the speeded interpolated task on memory for digits in all 12 task conditions across the 7 experiments. The digit lists were either fixed or unpredictable, the digit presentation rate was fast (4/s) or slow (1/s), and the secondary task, when present, was easy (hand tapping on knee) or difficult (articulatory suppression). Note: * indicates a significant difference from the interpolated task control for that task, and ^NS indicates that the effect was not significant. E1a-E2c indicate the numbered experiment that was the source of the data (e.g., E1a = Experiment 1a). Error bars are 95% within-subject confidence intervals (Loftus & Masson, 1994).