21.   Now Arafat has the time to try to alter this perception.

22.   Now anger-management education helps people alter perceptions and change behaviors.

23.   Q. Has something changed to alter your perception?

24.   Since then, nothing has happened to alter the perception that the carefully scripted modern political convention has lost its value as a television draw.

25.   Still, economic reports due out this week may do little to alter the perception that the economy is expanding at a moderate pace.

26.   Taken together, the reports did little to alter the perception that economic growth is decelerating.

27.   The decision was a no-brainer, they said at the time, and nothing that has happened since then has altered that perception.

28.   The reports did little to alter the perception that inflation remains tame, which could let the Federal Reserve postpone raising interest rates.

29.   The report did little to alter the perception that Federal Reserve policy-makers could raise interest rates at their meeting next month.

30.   This exhibition should alter that perception.