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. 2021 Aug 17;16(8):e0255348. doi: 10.1371/journal.pone.0255348

Table 1. Descriptive information for academic adjustment variables at ages 11, 14, and 17.

Age 11 Age 14 Age 17
M SD N M SD N r11 M SD N r11 r14
Grade Point Average 3.10 .66 2492 3.06 .79 2357 .64 3.02 .77 3449 .56 .73
Academic Motivation 20.89 2.50 2502 19.83 2.94 2335 .47 19.76 3.08 3412 .41 .62
 Self/Parent Report
Academic Motivation 19.87 3.13 1754 19.64 3.40 1808 .58 19.67 3.42 2249 .53 .58
 Teacher Report
Disciplinary Problems .00 .61 2429 .00 .80 2357 .25 .00 .75 3512 .25 .48

Note. M = mean; SD = standard deviation; N = number of ratings; r11 = correlation with corresponding variable at age 11; r14 = correlation with corresponding variable at age 14.