Abstract
The present study examines whether the relationship between memory complaints and memory performance
is better assessed by analyzing the mutual development. Five hundred participants, averaging 62.9
years of age at first measurement, were measured three times over 12 years. After establishing partial
strong factorial invariance, correlations between levels and between slopes of memory performance and
memory complaints were estimated using second-order latent growth curve models. The relationship
between slopes was found to be three times larger than the relationship between levels, indicating that
assessing the commonality in change is more informative than assessing the relationship at a given time
point.