Complex sentence: Between 1934 and 1936 Carington tested the trance mediumship of Eileen Garrett, Gladys Osborne Leonard and Rudi Schneider with word association and psychogalvanic reflex tests and from the results concluded their trance controls were secondary personalities, not spirits.
Split into simpler sentences: Between 1934 and 1936 Carington tested the trance mediumship of Eileen Garrett, Gladys Osborne Leonard and Rudi Schneider with psychogalvanic reflex and word association tests. Carington concluded from the results their trance controls were secondary personalities, not spirits.