nonimprovement

English

Etymology

non- +‎ improvement

Noun

nonimprovement (countable and uncountable, plural nonimprovements)

1. (uncountable) Lack of improvement; failure to improve.
2. (countable) A change that is not an improvement.
   • 2013, The Psychology of Learning and Motivation, page 30:

     The rate of imitation was about the same among solutions that were improvements and nonimprovements, suggesting that improvements were often achieved by imitating a relatively successful participant's solution and then slightly tweaking this solution.