POSITIVE REINFORCEMENT

\pˈɒzɪtˌɪv ɹˌiːɪnfˈɔːsmənt], \pˈɒzɪtˌɪv ɹˌiːɪnfˈɔːsmənt], \p_ˈɒ_z_ɪ_t_ˌɪ_v ɹ_ˌiː__ɪ_n_f_ˈɔː_s_m_ə_n_t]\
Sort: Oldest first
 
2010 - Medical Dictionary Database
By DataStellar Co., Ltd
 
1910 - Black's Law Dictionary (2nd edition)
By Henry Campbell Black