Dividing participant's overall search time by the modal time before changing direction provided an estimate of the number of changes of direction.
The number of changes in personnel contributed to a stop-stop opening first half.
Tattersall also criticised the number of changes made to the curriculum and called for a "period of stability".
His main topic: the number of changes that took place in what was a hectic year for professional football.
It takes the number of changes to seven following the 24-3 defeatoto Wales in Cardiff last week.
The oddity to this no-hitter was the number of changes Wedge made.
A brisk rate of evolution, as reflected in the number of changes in the genes' DNA sequence, implies intense selective pressure.
Tyrie added: "The best thing the government can do is to think through the changes and reduce the number of changes we need.
We have to balance the number of changes that are being made against the increased pressure on children.
The number of changes will run into double figures, including at least half a dozen new caps, with the Premiership leaders, Saracens, expected to supply more than a quarter of the squad.
At a doorstop on Wednesday, Labor's leader in the Senate, Penny Wong, said the bill was now "unrecognisable" because of the number of changes the "desperate" government had made.
