A multi-trait multi-method matrix is used to investigate the validity of a dementia questionnaire (completed by cancies) The scores on this dementia questionnaire (both memory and language) are compared to a psychologistsbacterial cheraton the found correlations are show in the table below. Are the correlations as expected when completing this type of matrix for a good instrument? Questionnaire Language Behavioral Observation Behavioral observation Questionnaire Memory Language Memory Behavioral observation ,87(a) Memory 91 (a) 96 (a) 159 (d) 940) .64(6) 180 (0) Behavioral observation.67(b) Language Questionnaire .79 (c) Memory Questionnaire .61 (0) Language Gr. 1 Dunia 159 (0) 96 (a) .79 () 940) Language Questionnaire Memory Questionnaire Language .80 (c) .64(6) .61 (d)
· Yes, because a >c>b>d.
· No, because you expect the lowest correlations forb.
· No, because you expect the highest correlations for c.
· No, because you expect that correlations d>a.