Lee Spector

Explaining and Exploiting the Advantages of Down-sampled Lexicase Selection

2020

In genetic programming, parent selection is ordinarily based on aggregate measures of performance across an entire training set. Lexicase selection, by contrast, selects on the basis of performance...

Quality Diversity through Human Feedback: Towards Open-Ended Diversity-Driven Optimization

2023 · arXiv (Cornell University)

Reinforcement Learning from Human Feedback (RLHF) has shown potential in qualitative tasks where easily defined performance measures are lacking. However, there are drawbacks when RLHF is commonly used to optimize for average human preferences, especially …

DALex: Lexicase-like Selection via Diverse Aggregation

2024 · arXiv (Cornell University)

Lexicase selection has been shown to provide advantages over other selection algorithms in several areas of evolutionary computation and machine learning. In its standard form, lexicase selection filters a population or other collection based on …