Table 3.
Correlations between the Cognitive Measures and the Baseline Measures Language Sample Measures and Dual Task Costs to Fluency, Complexity, and Content.
| Stroop Interference |
Digit Symbol Speed |
Working Memory Composite |
||||
|---|---|---|---|---|---|---|
| Young Adults |
Older Adults |
Young Adults |
Older Adults |
Young Adults |
Older Adults |
|
| Baseline Language Sample | ||||||
| MLU | −.02 | −.09 | +.40** | +.39* | +.31 | +.31 |
| % w/ fillers | +.01 | −.16 | +.14 | +.07 | −.17 | −.21 |
| fillers/utterance | +.15 | −.14 | +.12 | +.04 | −.15 | −.12 |
| WPM | +.02 | −.17 | +.41** | +.44** | −.12 | +.01 |
| MCU | −.11 | −.19 | +.14 | +.19 | +.54** | +.37* |
| DLevel | −.11 | −.21 | +.10 | +.19 | +.64** | +.41* |
| Dual Task Costs to Language | ||||||
| MLU | +.27 | +.17 | −.18 | −.17 | −.31 | −.23 |
| % w/ fillers | +.48** | +.23 | +.11 | +.04 | −.05 | +.01 |
| fillers/utterance | +.44** | +.24 | +.09 | −.04 | −.09 | +.04 |
| WPM | −.12 | +.24 | +.47** | +.54** | +.09 | −.04 |
| MCU | +.23 | +.24 | +.09 | +.06 | −.39* | −.18 |
| DLevel | +.22 | +.28 | −.14 | −.08 | −.44** | −.17 |
Note: MLU = mean length of utterance; fillers/utterance = number of fillers per utterance; % w/fillers = percentage of sentences with fillers; % Grammatical = percentage of grammatical sentences; WPM = words per minute; MCU = mean clauses per utterance; DLevel = developmental level; TTR = type-token ratio; PDensity = propositional density.
*
p < .05, prep ≥ .972
**
p < .01, prep ≥ .995