Abstract: The effects of an anti-littering sign that read ?We treat litterbugs like all insects? were compared with those for a sign that read ?Please save our landscape; don't litter.? Subjects were 350 college students, studying the natural environment and 100 noncollege adults visiting a state park. The subjects analyzed the signs and responded to a seven-item attitude questionnaire (before or after analyzing the two signs). The results suggest that the ambiguously worded ?litterbug? sign was interpreted differently by individuals within the various groups and also that it did not encourage an anti-littering attitude, nor did it affect stated intentions to litter.
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↑ http://dx.doi.org/10.1080/00958964.1988.9942757