Table 2.
Summary of Frequency Statistics for Stimuli
| Stimulus Category | K & F Adulta | AH 3–5b | Nc | Constrain Bigramd | Unconst. Bigrame | Constrain Trigramf | Unconst. Trigramg |
|---|---|---|---|---|---|---|---|
| Words | 539.11 (1161.73) | 545.06 (1004.82) | 169.65 (347.33) | 3188.77 (3113.16) | 24417.77 (17414.60) | 1151.59 (2021.22) | 3943.56 (5836.84) |
| Pseudowords | n/a | n/a | 206.92 (435.76) | 2154.30 (1920.11) | 20707.10 (13195.36) | 465.70 (799.44) | 2352.21 (3099.63) |
| Letter Strings | n/a | n/a | 9.87 (34.71) | 371.48 (874.07) | 11053.87 (11032.97) | 4.16 (21.28) | 362.86 (734.72) |
| Letter-in-Xs | n/a | n/a | 0 | 2.89 (17.68) | 199.82 (453.56) | 0 | 0 |
a
Adult frequency based on Kucera and Francis (1967) from the original Chase and Tallal (1990) report
b
Child frequency grades three to five based on the American Heritage ratings from the original Chase and Tallal (1990) report
c
Orthographic neighborhood, Coltheart’s N (Medler and Binder, 2005)
d
Constrained bigram frequency (Medler and Binder, 2005)
e
Unconstrained bigram frequency (Medler and Binder, 2005)
f
Constrained trigram frequency (Medler and Binder, 2005)
g
Unconstrained trigram frequency (Medler and Binder, 2005)