But changes in American society helped mask the effects.
Otherwise, you may mask the effects - positive or negative - of your training programme".
"We're learning that internal climate variability is important and can mask the effects of human-induced global change," said the paper's lead author, Noel Keenlyside of the Leibniz Institute of Marine Sciences in Kiel, Germany.
With her eyes red with tears and her thinning white hair covered with a black hat to mask the effects of chemotherapy, Dolores Mihalich squeezed her son and told him she loved him.
Because females have two X chromosomes, one of which may mask the effects of the inherited abnormality, their symptoms often are less severe than those experienced by males, who have just one X chromosome.
He and five other members of the Finnish team were forced to admit, after testing, that they had taken drugs used to boost endurance or to mask the effects of other performance-enhancing drugs.
Along another wall lean MDF and beech kitchen worktops that have been left in the sun, partially covered with objects – bits of wire, sticks and washers, circular and rectangular shapes to mask the effects of daylight on the boards, creating a kind of accidental cameraless photography of more-or less random traces.
The possibility of a placebo effect cannot be discounted; indeed, it is difficult to mask the effects such as those from (m)any CNS stimulants.
For this specification, they report results that are insensitive to the inclusion of state-specific trends, consistent with their argument that state-specific trends in employment-level regressions mask the effects of minimum-wage changes.
However, analysing the effect of exercise interventions based on such a crude overall measure of 'dose' may have acted to mask the effects of the individual components in these earlier analyses, and none took into account varying exercise intensities.
The trouble with most surveys, however, is that they do not address confounding factors, such as a skyrocketing divorce rate, which could mask the effects of income on happiness, says Glenn Firebaugh, a sociologist at Pennsylvania State University in University Park.
