Stimulus enhancement (SE): In addition to selecting resources according to their expected reward and the tendency to explore a given resource type asocially, SE increases a forager’s probability to consume resource type r by: 7\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document} $$ P_{S} = P(r | \gamma_{i}, d) = d \gamma_{i} $$ \end{document}PS=P(r|γi,d)=dγi