Appendix F.

Breakdown of item contextual substitutions (mean proportion) into exchanges and repetitions across tongue twister conditions and proportion of anticipation and perseveration errors for repetitions across Experiments 1–3.

	Tongue twister			Non-tongue twister
Experiment 1: rapid reading
Exchanges	36 (0.17)	Anticipations	48 (0.30)	36 (0.29)	Anticipations	13 (0.27)
Repetitions	158 (0.74)	Perseverations	110 (0.70)	49 (0.40)	Perseverations	36 (0.73)
Experiment 2: spoken recall
Exchanges	229 (0.63)	Anticipations	40 (0.31)	136 (0.72)	Anticipations	27 (0.51)
Repetitions	128 (0.35)	Perseverations	88 (0.69)	53 (0.28)	Perseverations	26 (0.49)
Experiment 3: typed recall
Exchanges	120 (0.57)	Anticipations	30 (0.33)	36 (0.55)	Anticipations	10 (0.34)
Repetitions	90 (0.43)	Perseverations	60 (0.67)	29 (0.45)	Perseverations	19 (0.66)