The book delves into experimental gerontopsychology, focusing on how age-related behavioral changes can be studied through age-group manipulation. It introduces a treatment aimed at equating different age groups to assess behavioral assimilation. The outcomes can indicate whether age-related differences are causal or irrelevant. However, the author argues that demonstrating functional equalization is often challenging, suggesting that studies with younger subjects may offer more advantages for exploring hypotheses about aging behaviors. The applicability of this experimental approach is noted to be limited.
