It fails to adequately address the possibility that many of the volunteers may not have understood what the psychological questionnaire was designed to measure.

It takes for granted that the volunteers with the highest levels of self-esteem had better social skills than did the other volunteers, even before the former volunteers had attained their high levels of self-esteem.

It overlooks the possibility that people with very high levels of self-esteem may tend to have a less accurate perception of the strength of their own social skills than do people with moderate levels of self-esteem.

It relies on evidence from a group of volunteers that is too small to provide any support for any inferences regarding people in general.

It overlooks the possibility that factors other than level of self-esteem may be of much greater importance in determining the strength of one's social skills.