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confound

(kŏn-fownd′) [L. confundere, to confuse, to pour together]
1. To introduce bias into a research study.
2. To confuse, bewilder, or mystify. confounding, n.
References in periodicals archive ?
We are now being confounded also by the emergence of green evangelicals, pro-life in a planetary sense.
Welsh Secretary Peter Hain, who led Labour's campaign in Wales, said: "Labour's result in Wales has exceeded expectations and confounded our critics and opponents.
Two years ago, the intermingling of legitimate email newsletters and spam in users' email in-boxes thoroughly confounded and frustrated newsletter subscribers, as well as undermined the efforts of serious marketers.
So here he is again: the momma's boy who became a World War I hero; the businessman with a record of failure; the late-starting, thoroughly uncharismatic Missouri pol who owed his job to a fabled backroom politicker and crook, yet managed to go relatively straight; the dim senator who astounded everybody with his exposures of corruption in the defense industry during World War II, probably saving the country billions of dollars; the ignored vice president and accidental president (``I'm not big enough for this job'') who faced up to a crush of momentous decisions from the instant he took office and then confounded the experts by winning re-election with his ``Give 'em Hell, Harry
Human error appears to have confounded the spacing error, the panel notes.
Harley Goldberg, a Medical Director at Kaiser Permanente, "the lack of safety and effectiveness evidence for alternative therapies has confounded physicians and the medical community.
But Albright's first talks as secretary of state with Deng's successors were characterized as frank and detailed discussions of the long list of issues that have often confounded the relationship.
The teams found that the gene contains three other genes within it, none of which appear to play a role in the illness, but which confounded efforts to find the actual culprit.
Addonics Technologies today announced a portable storage solution for users confounded by the incompatibility of the numerous Flash media storage options in today's digital cameras, camcorders, PDAs, MP3 players, and voice recorders.
The now-you-see-it, now-you-don't excise tax on airline tickets that confounded travelers last winter is about to disappear again.
But other factors -- including decreased estrogen levels in older women -- also lead to osteoporosis, and this has confounded previous studies looking at the influence of thyroid hormone therapy on bone density.
Most teachers, parents, and government officials remain confounded or frustrated over how we got here and what to do about it.