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Table 3 Frequency of children with CdLS, FXS and RTS who fit the original Guttman sequence

From: The development of early social cognitive skills in neurogenetic syndromes associated with autism: Cornelia de Lange, fragile X and Rubinstein–Taybi syndromes

Sequence 0 1 2 3 4 Other patterns N N fit scale exactly
Helping  +   +   +   +     
Re-enactment of intended acts or Communication: Point  +   +   +     
Communication: Gaze OR Cooperation: Tubes  +   +     
Cooperation: Trampoline  +     
Syndrome         
 CdLS 2 3 7 2 2 6 22 16 (73%)
 FXS 0 0 7 5 2 5 19 14 (74%)
 RTS 0 2 5 2 5 4 18 14 (78%)
 AUT* 3 1 13 2 0 2 21 19 (90%)
 TD* 4 7 19 29 14 13 86 73 (85%)
  1. A plus sign indicates that a child passed a task, whereas a minus sign indicates that a child failed a task
  2. *As reported in Ellis et al. [27]