After passing an initial test of suitability, administered by a Slashdot editor, a contribution is posted, followed by dozens, sometimes hundreds, of comments from the site's 305,000 users.
The printing trade, for example, introduced selection by objective testing of suitability and aptitude, while the motor-vehicle-repair industry developed an apprenticeship scheme for a national craftsman's certificate.
The first of these criteria limits the testing of suitability to those keys that distinguish between individuals with reasonably high probability, while the second and third criteria ensure that an employed key adds few false matches given any matches which have been made in earlier passes.
Ten Downing Street, Mr. Blair's office, dismissed the BBC's assertion tonight that, in days of talks culminating today, the prime minister had accepted Mr. Brown's assessment that Britain had not met certain economic tests of its suitability for adoption of the 12-nation euro.
Despite a relatively small sample size for PCA and IRT analyses the initial tests of sample suitability were reassuring.
Subsequent tests of model suitability did not indicate evidence of effect modification by any of the factors investigated, or sources of bias.
Tests of the suitability of the data for factor analysis proved satisfactory, with the Kaiser Meyer Olkin test value of 0.74 exceeding the recommended value of 0.60, 22 and Bartletts' test of sphericity 23 reaching statistical significance (P=0.0001).
