Table 1.

Comparison of data sets in prior experiments comparing repeated and unique letters using manipulations of insertions, deletions and/or substitutions

Experiment(s)	Subjects	Trials per subject per condition	Task	Key relevant manipulation
Schoonbaert and Grainger (2004) Experiments 1 and 2	44, 40	15	primed LDT, LDT (rejections)	Primes/nonwords constructed by deletion of a unique or repeated letter from a word.
Van Assche and Grainger (2006) Experiments 1a and 1b	40 (20 & 20)	15	primed LDT	Primes inserting a unique letter or repeating an adjacent letter.
Van Assche and Grainger (2006) Experiments 2a and 2b	36 (18 & 18)	15	primed LDT	Primes inserting two repetitions of the same adjacent letter or two unique letters.
Norris et al. (2010) Experiment 1	25	20	primed LDT	Primes replacing two letters with unique letters or with repetitions of different adjacent letters.
Norris et al. (2010) Experiments 2a and 2b	25, 25	20	primed same-diff.	Primes replacing two letters with unique letters or with repetitions of different adjacent letters.
Norris et al. (2010) Experiments 3a and 3b	30, 30	20	primed same-diff., primed LDT	Primes with deletion of a unique or repeated letter.
Trifonova and Adelman (2022) Experiment 1	96	88	2AFC identification	Foils created by deletion or insertion of a unique or non-adjacent repeated letter.
Trifonova and Adelman (2022) Experiments 2 and 3	64, 72	22, 58	primed same-diff.,primed same-diff.	Primes created by deletion or insertion of a unique or non-adjacent repeated letter.
Kerr et al. (2021)	36, 40	50, 25	LDT (rejections)	Nonwords constructed by insertion of a unique or non-adjacent repeated letter to a base word
Current Experiments 1, 2 and 3	80, 88, 72	36	primed LDT, LDT (rejections) primed same-diff.	Primes/nonwords created by deletion or insertion of a unique or non-adjacent repeated letter of a word.

Note: Studies are listed in chronological order of data collection rather than eventual publication