Table 3: Correlation between changes in NPQ and interest score, difficulty score and understanding score.

Interest Difficulty Comprehension
Mean score 71.7 ± 17.0 61.2 ± 16.9 60.4 ± 17.1
Correlations between scores and
immediate changes in NPQ
r = 0.18 (p = 0.11) r = -0.002 (p = 0.49) r = 0.07 (p = 0.54)
Correlation between scores and
one-month changes in NPQ
r = 0.20 (p = 0.08) r = 0.04 (p = 0.35) r = 0.04 (p = 0.75)

Values are presented as mean ± standard deviation.