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Answer: Ponzo illusion
Explanation:
The Ponzo illusion is a geometrical optical illusion that was first demonstrated by the Italian psychologist Mario Ponzo in 1911. He suggested that the human mind judges an object's size based on its background. He showed this by drawing two identical lines across a pair of converging lines, similar to railway tracks.
Answer:
The answer is- No control Group
Explanation:
The researchers want to use 120 rural schools, however this will not work out because there are no control groups in the experiment.
A control group is the group that does not receive the offer. In this scenario, all the 120 rural schools receive the offer. The control group will help measure the attendance of teachers this school year which were not offered better pay. This will be used to determine how much the offer increased the attendance or the impact of the better pay on the attendance 0f teachers.
It will also not be good to compare this year's attendance to that of last year because the condition this year might be different when compared to last year, for instance, if this year is unusually cold compared to last year and some of the teachers caught cold and could not attend some of their classes then it is expected that there will be lower attendance when compared to last year and the better payment would not be the cause of change in attendance.
Answer: In the turmoil surrounding the unpopular Vietnam War, lowering the national voting age became a controversial topic. Responding to arguments that those old enough to be drafted for military service, should be able to exercise the right to vote, Congress lowered the voting age as part of the Voting Rights Act of 1970.
Explanation: hopes this helps