Briefly define the following components of Campbell and Fiske's (1959) Multi-trait Multi- Method Matrix:
A) Heterotrait-heteromethod values
B) Monotrait-heteromethod values
C) Reliability diagonals
D) Heterotrait-monomethod values

Question

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B) Monotrait-heteromethod values: Correlations between the same trait measured by different methods.
C) Reliability diagonals: Correlations between the same trait measured by the same method at different times.
D) Heterotrait-monomethod values: Correlations between different traits measured by the same method.

Answer: Choice A and C
 The heterotrait-heteromethod values (A) are important for assessing convergent and discriminant validity, while the reliability diagonals (C) are essential for evaluating the consistency or stability of the measurement. These two components provide crucial information about the quality of the data and should be considered when interpreting the results. The monotrait-heteromethod values (B) can also provide some information about the validity of the measurement, but they are less informative than the other two components. The heterotrait-monomethod values (D) are often considered as a potential source of method bias but are not as important as the other components when evaluating the quality of the data.

Briefly Define the Following Components of Campbell and Fiske's (1959)