
For trainers, understanding the Forgetting Curve is crucial to designing programs that
promote knowledge retention. By leveraging strategies such as spaced repetition,
microlearning, and active recall, trainers can ensure that employees remember and
apply what they learn.
This article explores the science behind the Forgetting Curve, its implications for
trainers, and actionable strategies to improve knowledge retention in training programs.
Understanding the Forgetting Curve
The Forgetting Curve was developed by Hermann Ebbinghaus, a 19th-century
German psychologist who conducted experiments on memory retention. His research
revealed that:
● Memory retention declines rapidly after learning if the information is not
reinforced.
● Learners forget up to 50% of new information within an hour and about 70%
within a day without reinforcement.
● The rate of forgetting slows down if information is reviewed periodically over time.
Ebbinghaus’s findings highlight a fundamental challenge in training: how to combat
forgetting and improve long-term retention.
Why the Forgetting Curve Matters for Trainers
For trainers, the Forgetting Curve is a crucial concept because it explains why
traditional one-time training sessions often fail to achieve lasting results. If employees
forget most of what they learn within days, the time and resources invested in training
are wasted.
Challenges Trainers Face Due to the Forgetting Curve
1. Knowledge Decay – Employees may recall only a fraction of what they learned,
leading to gaps in performance.