For these reasons we repeated the experiment with individual hens and with a shorter litter deprivation time and a shorter stimulus exposure, after which the test hen was allowed to join the stimulus hen.
The history of the pin-up girl stems back to the time of World War I, when President Woodrow Wilson formed the Division of Pictorial Publicity to create visual stimuli to persuade men to join the war effort.
We suggested that subtle effects of social stimuli on dustbathing motivation may have been masked by the effect of long litter deprivation and that it may be important for the birds to be able to join the stimulus birds to dustbathe together.
It was in February, when the president was trying to round up votes for his stimulus package and invited Mr. Schock to join him aboard Air Force One.
That is one reason Mr. Bush moved quickly, after an extended swing through the Middle East, to join Democrats last week in proposing a stimulus that would distribute rebate checks of up to $1,200 to 117 million families.
In London, European governments and others need to join the the US in committing to a scale of economic stimulus that is appropriate to the danger.
"Now, I wonder if you'd like to join me in the map room and give my package some stimulus".
