Table 2.
Correlations (Pearson’s r) Among Measures of Reading, Mathematics, Writing, and Cognitive G
| Reading | Mathematics | Writing | |||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Basic | Complex | Basic | Complex | Basic | Complex | ||||||||||||||
| 1. | 2. | 3. | 4. | 5. | 6. | 7. | 8. | 9. | 10. | 11. | 12. | 13. | 14. | 15. | 16. | 17. | 18. | 19. | |
| Reading | |||||||||||||||||||
| Basic | |||||||||||||||||||
| 1.PIAT Reading | |||||||||||||||||||
| 2.PIAT Spelling | .71 | ||||||||||||||||||
| 3.TLWRT | .87 | .74 | |||||||||||||||||
| 4.TOWRE | .66 | .56 | .82 | ||||||||||||||||
| 5.GORT-3 Fluency | .79 | .70 | .82 | .70 | |||||||||||||||
| Complex | |||||||||||||||||||
| 6.PIAT Comprehension | .69 | .57 | .67 | .52 | .61 | ||||||||||||||
| 7. WJ-III Passage Comp | .66 | .54 | .64 | .49 | .62 | .65 | |||||||||||||
| 8.QRI Questions | .36 | .24 | .36 | .26 | .37 | .38 | .45 | ||||||||||||
| 9.GORT-3 Comprehension | .44 | .34 | .41 | .28 | .41 | .46 | .49 | .39 | |||||||||||
| Mathematics | |||||||||||||||||||
| Basic | |||||||||||||||||||
| 10. WRAT-R Arithmetic | .53 | .46 | .55 | .42 | .54 | .49 | .50 | .26 | .28 | ||||||||||
| 11. WJ-III Math Fluency | .43 | .35 | .45 | .48 | .56 | .34 | .36 | .19 | .22 | .64 | |||||||||
| Complex | |||||||||||||||||||
| 12.Wechsler Arithmetic | .52 | .45 | .53 | .43 | .55 | .48 | .52 | .32 | .35 | .70 | .52 | ||||||||
| 13.WJ-III Applied Problems | .48 | .41 | .52 | .32 | .49 | .47 | .51 | .34 | .39 | .64 | .46 | .68 | |||||||
| Writing | |||||||||||||||||||
| Basic | |||||||||||||||||||
| 14.WRAT-R Spelling | .82 | .76 | .85 | .63 | .79 | .61 | .59 | .25 | .33 | .55 | .48 | .53 | .46 | ||||||
| 15.Handwriting Copy | .36 | .33 | .39 | .45 | .46 | .30 | .27 | .10 | .16 | .35 | .45 | .30 | .23 | .40 | |||||
| Complex | |||||||||||||||||||
| 16.WJ-III Writing Fluency | .54 | .46 | .59 | .56 | .60 | .46 | .50 | .27 | .32 | .54 | .47 | .47 | .46 | .56 | .57 | ||||
| 17.WJ-III Writing Samples | .47 | .42 | .48 | .30 | .51 | .46 | .45 | .29 | .40 | .48 | .33 | .43 | .46 | .51 | .33 | .44 | |||
| 18.TOWL-4 Story | .38 | .29 | .39 | .36 | .38 | .30 | .42 | .18 | .23 | .36 | .39 | .33 | .38 | .37 | .42 | .46 | .40 | ||
| 19.WIAT-III Essay | .45 | .33 | .47 | .36 | .44 | .32 | .41 | .32 | .27 | .37 | .28 | .35 | .38 | .41 | .24 | .41 | .34 | .33 | |
| Cognitive g | |||||||||||||||||||
| 20. FSIQ | .54 | .47 | .56 | .42 | .57 | .59 | .62 | .47 | .50 | .51 | .26 | .64 | .34 | .48 | .31 | .50 | .46 | .27 | .32 |
Note. All correlations were significant at the p<.001 level.
White boxes represent intra-construct correlations at either the basic or complex level. Light gray boxes represent intra-construct correlations across basic and complex measures. Darker gray boxes represent cross-construct correlations.
PIAT: Peabody Individual Achievement Test; TLWRT: Time Limited Word Recognition Test; TOWRE: Test of Word Reading Efficiency; GORT-3: Gray Oral Reading Tests—Third Edition; QRI: Qualitative Reading Inventory; WIAT-III: Wechsler Individual Achievement Test—Third Edition; WJ-III: Woodcock Johnson Tests of Achievement—Third Edition; WRAT-R: Wide Range Achievement Test—Revised; FSIQ: Full Scale IQ