for the five scales in the Rahmawati et al. (2020) study. As mentioned ear-lier, AVE is a measure of variance associated with the factor. If the square root of AVE is smaller than the correlation between factors, this means that there is poor discriminant validity (see Tables 5.6 and 5.7, below). As indi-cated in Table 5.6, Rahmawati et al. found good discriminant validity; in all cases the square root of AVE exceeded all between factor correlations.
Table 5.6. Discriminant Validity of Five Scales of Indonesian DMQ 18
COP GMP SPA SPC MP AVE
COP .81 .66
GMP .56 .77 .59
SPA .55 .50 .86 .74
SPC .46 .57 .58 .86 .74
MP .53 .56 .53 .48 .89 .79
Note. Data from Rahmawati et al. (2020).
Abbreviation: AVE = average variance extracted; COP = Cognitive/Object Persistence;
GMP = Gross Motor Persistence; SPA = Social Persistence with Adults; SPC = Social Per-sistence with Children; MP = Mastery Pleasure.
Amukune et al. (2020) also found good discriminant validity among the scales of DMQ 18. In all cases, the square root of AVE was larger than the correlations between the factor corresponding to that scale and all other fac-tors (see Table 5.7).
Table 5.7. Discriminant Validity of the Kenyan DMQ 18 Preschool Version
COP GMP SPA SPC MP NRC AVE
COP .78 .60
GMP .59 .78 .61
SPA .49 .63 .89 .79
SPC .62 .73 .79 .84 .70
MP .77 .61 .49 .72 .89 .80
NRC .71 .54 .37 .47 .61 .93 .86
.71 with Negative Reaction to Challenge. These high intercorrelations sug-gest that although the factors can be seen as distinct, a general mastery mo-tivation construct also underlies the scales, at least for this sample.
Conclusion
In summary, there is substantial evidence to support the convergent, crite-rion, factorial, and discriminant validity of DMQ 18 as well as most of these types of validity for its predecessor, DMQ 17. However, studies of factorial validity of DMQ 17 suggested difficulties with the social persistence scales and somewhat different constructs for the Chinese version, perhaps because of cultural and/or translation differences. Moreover, self-reports of DMQ 17 had lower factorial validity, and negatively worded (reversed) items on DMQ 17 did not have strongest loading from the factors they were intended to measure. However, there is some evidence that some of these negatively worded items are more successful in measuring negative/withdrawal re-sponses in mastery contexts. Factorial validity with DMQ 18 was much stronger than that with the full DMQ 17, especially for Chinese-speaking samples. Additional research is needed on the factorial validity of DMQ 18 when negative reaction items are included, particularly for English-speak-ing samples. To date, studies of factorial validity of DMQ 18 have not in-cluded NRC items.
The next chapter, Chapter 6, discusses cross-national and age compar-isons using the DMQ; it also presents data about the relationships between mastery motivation and school success.
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