"completed independently" is correct and usable in written English.
It can be used to describe an action or an object that was finished by an individual without assistance or guidance. For example, "The project was completed independently by the student".
The papers, completed independently of one another, use similar methods.
The study search and screening were completed independently by two reviewers (SLN and JP).
While the group project is a collaborative effort, all homeworks should be completed independently.
Students are more often than not passive listeners and practice problems are usually completed independently.
In both cases, the rankings and reviews were completed independently of the companies that paid for them.
Wen Liyuan, a Nike spokesman in Shanghai, said the "the stickman works of Nike were created and completed independently by a third party under the commission of Nike".
You complain when parents are expected to help with it and you complain when it's designed to be completed independently and your child struggles with this.
Network modeling was completed independently for distinct data subsets, representing periods of 'low' and 'high' water levels throughout in the wetland.
Activities in class and homework projects that need to be completed independently can help prepare children for the new world of homework timetables and detentions for not meeting deadlines.
Objective: To determine the internal consistency, reliability, and comparability of the Mayo-Portland Adaptability Inventory (MPAI-4) and subscales completed independently by people with acquired brain injury, family and significant others, and rehabilitation staff.
Credit may be awarded only for work done while a student was officially enrolled at such an institution, and cannot be given for any work completed independently of such formal enrollment.
