Dr. Low is interested in studying the effect mood has on the willingness to help a stranger. She randomly assigns half of her participants to the pleasant mood condition and shows them funny film clips. The other half of her participants is assigned to the unpleasant mood condition and is forced to watch boring film clips. She then gives every participant an opportunity to donate money to a homeless stranger. Dr. Low is using a(n) design.

I wonder if you know

How they live in Tokyo (はい!)

If you seen it then you mean it

Then you know you have to go

Fast and furious! (キタ!) (Drift, Drift, Drift)

Fast and furious! (キタ!) (Drift, Drift, Drift)

Wonder if you know

How they live in Tokyo (はい!)

If you seen it then you mean it

Then you know you have to go

Fast and furious! (キタ!) (Drift, Drift, Drift)

Fast and furious! (キタ!) (Drift, Drift, Drift)

Explanation:

world war i had a devastating effect on german-americans and their cultural heritage. up until that point   german-americans, as a group, had been spared much of the discrimination, abuse, rejection, collective mistrust experienced by so many different racial and ethnic groups in the history of the united states. indeed, over the years, they had been viewed as a well integrated and esteemed part of american society. all of this change with the outbreak of war.  

answer; the trial de novo