|We conducted the study||instead of||The study was conducted by us|
|We made mistakes||instead of||Mistakes were made|
|The dog bit the man||instead of||The man was bitten by the dog|
Be succinct. Avoid wordiness and redundancy.
||the reason is
Avoid bias. Avoid labeling people (the elderly, the schizophrenics, normal, etc.).
Use past tense when discussing another researcher's work.