This is the report of a "human relations" lab which was held on a rural estate where the staff and participants lived for eight days. Both six months after and five weeks before participation in this intensive T-group experience, the participants were described by themselves, one intimate, and one colleague on a variety of personality measures which reduced--as anticipated from theory-- to independent measures of Self-Acceptance (SA) and Other-Acceptance (OA). Covariance analysis of perceived changes (postlab score minus prelab score) revealed significant gains on both dimensions as well as significant variations in Self-Acceptance gains by T-groups. Within-lab ratings of trainers by T-group members on effectiveness, Self-Disclosure, and Feedback-Seeking generally correlated positively and significantly with changes in both Self-Acceptance and Other-Acceptance by T-group units. Senior trainers who were Diplomats in clinical psychology were notably most effective. The need for a greater emphasis upon the acceptance of others was indicated by the much smaller overall gain in OA than in SA. (Author/BW)