Noncrowdsourced

In the past, similar but noncrowdsourced studies were limited to a small number of motivated participants that were willing to spend up to 12 h in order to place the large number of gauges.

Source: wiktionary

For this work on back pain, we decided that the opinions and perspectives of people with back pain—regardless of their health care access or utilization—would give valuable and potentially different insights from a sample derived using noncrowdsourced approaches.

Source: wiktionary

This experiment illustrated that the crowd can produce similar experimental findings to well-established experimental studies conducted with a noncrowdsourced sample.

Source: wiktionary