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Short term memory test.
It is often referred to as the test of seven plus or minus 2. The test was developed by a psychologist whose name is George Miller. It was developed in 1956. It is currently one of the most often cited studies in this branch of psychology.
Answer:
India is said to be 'an unity in diversity', because there are so many castes, creeds, religions, languages and so on, but in a unique way India continues to be a strong nation state because we are united as a people. There is a proverb,'united we stand, divided we fall'; as long as Indians remain united foreign powers will not be able invade us. It is, therefore, absolutely necessary for the people of a country to remain united for them to be able to prevent foreign invasion.
Explanation:
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