Final answer:
The question refers to the Lovaas (1987) study on Applied Behavior Analysis (ABA) but the provided context does not contain relevant information on this study, thus it's not possible to provide a recovery rate without the correct data.
Step-by-step explanation:
The Lovaaas (1987) study you refer to is widely known as the Lovaas study on Applied Behavior Analysis (ABA) for children with autism. However, it appears that there has been a misunderstanding or typo in your question as 1987 Lovaas study is not mentioned within the provided context. Instead, the passages provided seem to be related to different studies on various subjects. None of them specify the results or recovery rates relating to the Lovaas (1987) study. Therefore, I cannot provide a recovery percentage without access to the appropriate information on the specific Lovaas (1987) study.