Splice site scores and p-values for the 5' and 3' sites of prevalent and non-prevalent splice forms. The table shows data that support two hypotheses: (i) non-prevalent splice sites are weaker than splice sites associated with the prevalent splice form; (ii) prevalent splice sites are weaker than splice sites associated with constitutive splicing. The "avg. score" columns provide the average score of splice site occurrences. For the comparison of non-prevalent with prevalent splice forms, the scores are computed with respect to a motif model of prevalent instances; for the comparison of prevalent and constitutive splicing the scores are computed with respect to a model of the constitutive splice sites.