While attitude similarity has been found to lead to high attraction, attitude dissimilarity has generally been found to lead to only slight disliking. It was hypothesized that this asymmetry is the result of a social desirability artifact caused by subjects’ reluctance to express negative evaluations. In a 2 by 2 factorial design, subjects evaluated either a 0% or a 100% similar stranger, and attraction toward the stranger was measured by either a typical rating procedure or by a “bogus pipeline” procedure expected to minimize socially desirable responding. The expected results appeared in the case of a “liking” measure but not in the case of a “work with” measure.