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Assertion (A): Validity is a prerequisite for a test to be sound Reason (R): Validity indicates the extent to which the test measures what it intends to measure, when compared with some outside independent criterion
Which of the following is a disadvantage of "Naturalistic observation"
'T'h'e' 'P'e'r's'o'n'-'E'n'v'i'r'o'n'm'e'n't' '('P'-'E')' 'F'i't' 'i's'
Escape learning means:
In india, the first institution for mentally retarded was started in Bombay in