Table 8.
Correlations among all Span Tasks for the Younger and Older Adult Groups.
| Verbal Simple | Verbal Complex | Spatial Simple | Spatial Complex | Young SD | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Digit | Letter | Word | Read | Count | Operate | Line | Grid | Dot | Parallel | Align | Position | ||
| Digit | .785 | .699 | .699 | .649 | .641 | .482 | .479 | .471 | .502 | .476 | .450 | .080 | |
| Letter | .793 | .768 | .712 | .710 | .697 | .515 | .381 | .452 | .572 | .469 | .499 | .086 | |
| Word | .684 | .737 | .616 | .583 | .705 | .453 | .387 | .389 | .445 | .416 | .439 | .101 | |
| Read | .491 | .445 | .440 | .713 | .687 | .551 | .523 | .548 | .643 | .533 | .560 | .147 | |
| Count | .430 | .439 | .401 | .714 | .629 | .496 | .467 | .522 | .568 | .536 | .534 | .147 | |
| Operate | .477 | .487 | .552 | .642 | .646 | .509 | .382 | .410 | .533 | .499 | .511 | .138 | |
| Line | .305 | .353 | .302 | .302 | .284 | .228 | .633 | .684 | .739 | .614 | .662 | .073 | |
| Grid | .170 | .207 | .213 | .175 | .231 | .201 | .500 | .695 | .610 | .599 | .587 | .086 | |
| Dot | .282 | .278 | .290 | .266 | .293 | .262 | .599 | .649 | .625 | .646 | .631 | .090 | |
| Parallel | .268 | .280 | .280 | .393 | .433 | .314 | .641 | .527 | .632 | .662 | .708 | .121 | |
| Align | .273 | .299 | .275 | .300 | .408 | .331 | .525 | .631 | .566 | .620 | .755 | .098 | |
| Position | .327 | .345 | .313 | .391 | .488 | .411 | .480 | .451 | .587 | .629 | .570 | .127 | |
| Old SD | .084 | .081 | .092 | .136 | .143 | .131 | .088 | .087 | .079 | .135 | .099 | .107 | |
Note: Correlations above the diagonal are correlations are for the Young Adult Group and correlations below the diagonal are for the Older Adult Group. Young = Younger Adult Group, Old = Older Adult Group, SD = Standard Deviation of the Residuals, Read, Count, Operate and Align = Reading, Counting, Operation, and Alignment.