Hence, self-reported and accelerometer-measured physical activity may be measuring different constructs, with the former measuring one's perception of functionality while the latter captures actual physical activity level.
For example, the scores of two distinct listening tests may be measuring a single construct of listening skills.
This paper documents the variations observed and speculates on how such variations may be measuring intrinsic differences within the development process rather than differences in counting ability.
The lowest correlations were found between the FPS-R and the other scales, suggesting that the FPS-R may be measuring a broader construct incorporating pain.
For example, the questions may be measuring the importance that participants place on their existing mechanistic knowledge (i.e., whether they considered the robot's motor and wheels important enough to include in their responses).
Another consideration is that self-report and behavioural measures of impulsivity may be measuring different constructs, which are often not correlated with each other (e.g. Reynolds et al. 2006; Stanford et al. 2009).
