Ross says:
...four psalms (1, 32, 37, and 49) may legitimately be called Wisdom Psalms, four psalms (25, 92, 94, and 107) contain clearly identifiable wisdom elements of varying lengths, and another four (19B, 73, 119, and 139) reflect some of the concerns of Israelite wisdom. Other psalms that are classified as wisdom psalms on stylistic and thematic grounds contain relatively few Wisdom words: 34, 112, 127, 128, and 133.