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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]