STEP-BY-STEP ANSWER:
Step [1]: Identify the nature of the adjustment. Accounting changes involve modifications to principles, policies, or estimates, while error corrections address mistakes from previous reporting periods.
Step [2]: Determine the method of application. Changes in accounting principles require retrospective adjustments (applying corrections to previously reported financial statements) whereas changes in estimates are recognized prospectively (only affecting future periods).
Step [3]: Assess the impact on comparability. Retrospective adjustments improve comparability over time, while error corrections ensure historical accuracy.
Final Answer: Accounting changes (especially in principles) require adjustments to prior periods using retrospective methods, whereas error corrections fix prior mistakes without changing the current accounting methodology.