Reinforcement learning about expected rewards: The rewards that foragers associate with each resource type r are updated via reinforcement as follows: 6\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document} $$ a_{ir}' = a_{ir} + \lambda_{i}(e_{ir} - a_{ir}) $$ \end{document}air′=air+λi(eir−air)