If infants naturally improve in visual acuity and thus perform better at the end of an experiment than at the beginning, what threat is operating?

Question

Quizplus · Accepted Answer

Maturation refers to the natural changes that occur in individuals over time due to development, aging, and learning. In this scenario, the infants are improving in visual acuity due to maturation rather than any manipulation or external factor, which could be a threat to the validity of the experiment.

If Infants Naturally Improve in Visual Acuity and Thus Perform