intraindividual

adjective
in·​tra·​in·​di·​vid·​u·​al | \ -ˌin-də-ˈvij-(ə-)wəl, -ˈvij-əl How to pronounce intraindividual (audio) \

Medical Definition of intraindividual

: being or occurring within the individual intraindividual changes in performance on cognitive tasks— L. J. Harris