| Rank | Centrality | Count | Year | Keyword | Rank | Centrality | Count | Year | Keyword |
|---|---|---|---|---|---|---|---|---|---|
| 1 | 0.29 | 27 | 2000 | disability | 6 | 0.15 | 11 | 2006 | aggression |
| 2 | 0.26 | 60 | 1997 | challenging behavior | 7 | 0.15 | 33 | 2003 | disorder |
| 3 | 0.22 | 17 | 1997 | applied behavior analysis | 8 | 0.12 | 16 | 2006 | mental health |
| 4 | 0.19 | 12 | 2001 | people | 9 | 0.12 | 20 | 2002 | antisocial behavior |
| 5 | 0.16 | 14 | 1997 | developmental disability | 10 | 0.11 | 5 | 2004 | behavior problem |