Question 1
The most widely discussed threat to the accuracy of longitudinal findings is
◦ practice effects.
◦ cohort effects.
◦ selective attrition.
◦ biased sampling.
Question 2
The term sensitive period applies better to human development than the strict notion of a critical period because
◦ its boundaries are less well-defined than are those of a critical period.
◦ the capacity to acquire certain skills cannot occur later than the optimal period.
◦ there are more sensitive periods than critical periods in human development.
◦ sensitive periods, but not critical periods, have been empirically tested.