Table 1 contains the mean scores with standard deviations for each of the
13 tasks used in the study for 4- and 5-year-olds separately. A principal component
factor analysis on the 4-year-olds normalized scores for the music
tasks (same/different melody, same/different chord, chord analysis, same/different
rhythm, and rhythm production) revealed a single factor that accounted
for 48.2% of the variance (see Table 2 for weights). Thus a single
music macro-variable consisting of the factor-weighted average of the five
normalized music variables was constructed for use in regression analyses.
The same factor analysis on the 5-year-olds data revealed two factors, corresponding
to pitch perception (same/different melody, same/different chord,
and chord analysis) and rhythm perception (same/different rhythm, rhythm
production), which together accounted for 65.2% of the variance (see Table
2 for weights). Thus, by 5 years of age, separate pitch and rhythmic abilities
can be measured. Two music macro-variables, consisting of the factorweighted
averages of the normalized pitch and the normalized rhythm variables
were created for use in regression analyses.
Table 1 contains the mean scores with standard deviations for each of the13 tasks used in the study for 4- and 5-year-olds separately. A principal componentfactor analysis on the 4-year-olds normalized scores for the musictasks (same/different melody, same/different chord, chord analysis, same/differentrhythm, and rhythm production) revealed a single factor that accountedfor 48.2% of the variance (see Table 2 for weights). Thus a singlemusic macro-variable consisting of the factor-weighted average of the fivenormalized music variables was constructed for use in regression analyses.The same factor analysis on the 5-year-olds data revealed two factors, correspondingto pitch perception (same/different melody, same/different chord,and chord analysis) and rhythm perception (same/different rhythm, rhythmproduction), which together accounted for 65.2% of the variance (see Table2 for weights). Thus, by 5 years of age, separate pitch and rhythmic abilitiescan be measured. Two music macro-variables, consisting of the factorweightedaverages of the normalized pitch and the normalized rhythm variableswere created for use in regression analyses.
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