To fill the spaces, use a word formed from the words in the list below.
PIGEON POWER
Tom Jones, a psychologist, reports a new role for pigeons. Asked by a pharmaceutical company to measure the effects of drugs on animal behaviour, Jones noticed one day that some 70 women were employed to check flawed capsules. "That is a job any pigeon could do," he said, because he knew about the pigeon's learning (01)............................ .
On (02)............................ , capsules left the (03)............................ line. There, Jones arranged for a bright, narrow beam of light to pass through them. If a capsule was perfect, the light showed a single spot; if it was (04)............................ , the light showed a double spot.
In their training, two pigeons were rewarded with food every time they correctly identified a wrong capsule. The experiment worked. A (05)............................ belt carried the capsules as fast as two a second past the pigeon (06)............................ , who achieved 99 per cent success within a week.
But the company rejected (07)............................ of the pigeons on a permanent basis. They feared (08)............................ that might be bad: The public might think pigeons were not as (09)............................ as humans. "A main obstacle to progress," commented Jones sadly, " remains man's obstinate belief in his (10)............................ over other creatures."
01. able
02. complete
03. produce
04. perfect
05. convey
06. inspect
07. employ
08. public
09. rely
10. superior
