An influential Harvard child psychiatrist told the drug giant Johnson & Johnson that planned studies of its medicines in children would yield results benefiting the company, according to court documents dating over several years that the psychiatrist wants sealed.

The psychiatrist, Dr. Joseph Biederman, outlined plans to test Johnson & Johnson’s drugs in presentations to company executives. One slide referred to a proposed trial in preschool children of risperidone, an antipsychotic drug made by the drug company. The trial, the slide stated, “will support the safety and effectiveness of risperidone in this age group.”

Dr. Biederman was the lead author of a trial published last year concluding that treatment with risperidone improved symptoms of attention deficit and hyperactivity disorder in bipolar children.

Dr. Biederman  who was director of the Johnson & Johnson Center for Pediatric Psychopathology Research at Massachusetts General Hospital, in Boston  is in the middle of two controversies: one involves the use of antipsychotic drugs in children, and the other relates to conflicts of interest in medicine.