This holds even when the length of the training sessions and the trial spacings are equated between groups, and when the visual-alone trials used for comparison between groups are physically identical (i.e., silent).
In the present study, some aspects of the housing and testing conditions were equated between laboratories (e.g. supplier, testing order, position of cages within the rack), while others remained laboratory-specific (e.g. local room architecture, tracking software, experimenter, time of testing, handling and identification method).
It was tested whether the twin correlations could be equated between twins sharing a classroom and twins in different classrooms.
Reliable test-equating between examinations sat by different cohorts was not possible as there were no common items included.
For each of the scales, genetic and environmental influences could not be equated between the sexes without a significant deterioration in model fit (P ≥ 0.01).
We measured discrimination thresholds by adaptively controlling either the (1) signal-to-noise ratio or (2) disparity, thereby ensuring that task difficulty was equated between tasks (and before versus after training).
For instance, it is possible that the time for linearization (t*) between C p and C b should not equate that between plasma and tissue, as these are in essence independent processes.
Therefore, in order to equate performance between younger and older participants in the blur condition, the Gaussian kernel SD would need to be increased by 1.48 arcmin for the stimuli presented to the 20 29 age group.
A very early suggestion made by Elliot Adams in 1911, and based on the arrangement of elements in each horizontal periodic table row, was that elements of atomic weight greater than 256± (which would equate to between elements 99 and 100 in modern-day terms) did not exist.
A second limitation is that interaction through TV monitors, rather than face-to-face interaction, is crucial to equate stimuli between the contingent and non-contingent conditions.
