During the first quarter of his freshman year in high school,Dinky received a very low score on a vocabulary test.Three months later Dinky took test again,and he scored much higher on the test.Dinky's improvement can be explained by:
A)maturation
B)regression toward the mean
C)testing effects
D)all of the above (all are good explanations)

Question

Quizplus · Accepted Answer

All the options provided can contribute to Dinky's improvement. Maturation could have played a role as Dinky naturally developed and improved his vocabulary over time. Regression toward the mean suggests that after an unusually low score, Dinky's performance would likely improve towards his average on a subsequent test. Testing effects imply that having taken the test once, Dinky would be more familiar with the test format or specific vocabulary, leading to better performance the second time.

During the First Quarter of His Freshman Year in High