Of all of the areas in research integrity, research misconduct may be the most familiar. Research misconduct, namely, fabrication, falsification, and plagiarism, involve research choices made by a scientist or engineer where the act of wrongdoing is often the most clear and in which there is little ethical ambiguity. One can certainly fabricate or falsify more or less data, or plagiarize a little or a lot, but just the mere fact of doing so makes the action a violation of the basic ethical expectation of responsible research.
The ORI defines Research Misconduct as follows:
Research misconduct means fabrication, falsification, or plagiarism in proposing, performing, or reviewing research, or in reporting research results.