 In the Schrenck-Notzing experiments with Carrière the scientific controls were scarce and there was evidence that she had freed her hands in the séance room.Harry Price wrote the photographs of her ectoplasm taken with Schrenck-Notzing look artificial and two-dimensional made from cardboard and newspaper portraits and that there were no scientific controls as both her hands were free.In 1920 Carrière was investigated by the Society for Psychical Research in London.