mixed0 mixed1 mixed2 mixed3 RCR Study 1: rcr_study1 -> rcr_post -> rcr_span (ヒント条件交互割付) RCR Study 1: rcr_study1 -> rcr_post -> rcr_span (ヒントなし control) RCR Study 1: rcr_study1 -> rcr_post -> rcr_span (ヒントあり hint) 【単体テスト】逆唱スパン課題のみ (rcr_span only)