Table 1.
E-Z Reader parameter interpretations and default values.
| Type of Processing | Parameter | Interpretation | Values |
|---|---|---|---|
| Word Identification | α1 | mean maximum L1 time (ms) | 104 |
| α2 | effect of frequency on L1 time (ms) | 3.5 | |
| α3 | effect of predictability on L1 time (ms) | 39 | |
| Δ | proportional difference between L1 and L2 | 0.34 | |
| A | mean attention-shift time (ms) | 25 | |
| Higher-Level Language Processing | I | mean integration time (ms) | 25 |
| pF | probability of integration failure | 0.05 | |
| pN | probability of regression being directed to prior word | 0.5 | |
| Saccadic Programming & Execution | M1 | mean labile programming time (ms) | 125 |
| ξ | proportion of M1 allocated to “preparatory” sub-stage | 0.5 | |
| M1,R | additional time required for labile regressive programs (ms) | 30 | |
| M2 | mean non-labile programming time (ms) | 25 | |
| Ψ | optimal saccade length (character spaces) | 7 | |
| Ω1 | effect of launch-site fixation duration of systematic error | 6.0 | |
| Ω2 | effect of launch-site fixation duration of systematic error | 3 | |
| η1 | mean maximum random error (character spaces) | 0.5 | |
| η2 | effect of saccade length on random error (character spaces) | 0.15 | |
| λ | increase in refixation probability (character spaces) | 0.16 | |
| S | saccade duration (ms) | 25 | |
| Visual Processing | V | eye-to-brain transmission time (ms) | 50 |
| ε | effect of visual acuity | 1.15 | |
| General | σγ | standard deviation of gamma distributions | 0.22 |