Table 1.

Correlations of education and age with vocabulary and processing speed measuresa

Vocabulary KnowledgePicture VocabularyConnections Simple
Simple correlations
Partial correlations controlling for education
  • aSimple correlations with Z-transformed scores on the cognitive metrics and partial correlations after controlling for education. Age2, Residuals of age-squared after regressing out actual age in years. Bootstrap (1000) CIs for significant correlations: Education with Vocabulary Knowledge [0.39, 0.67], Picture Vocabulary [0.27, 0.59]; Age with Connections Simple [−0.75, −0.53].

  • ***p < 0.001.