(B) Ten black and ten white cards
(C) Five black and white & five multi-coloured cards
(D) Ten multi-coloured cards
72. Which of the following terms is relevant to a qualitative study ?
73. Which of the following is a characteristic feature only of experimental studies ?
(B) Study of cause and effect relationship.
(C) Observing variation in the dependent variable.
(D) Manipulation of treatment variable.
74. When a researcher checks the genuineness and authenticity of the source material, it is known as
(A) External validity
(B) External criticism
(C) Concurrent validity
(D) Internal consistency
75. An investigator studied the census data for a given area and prepared a write up based on them. Such a write-up is called
(A) Research Paper
(D) Research Report