The comparison between the reversible and irreversible clauses total scores showed a highly significant difference between TD and ASD children in the comprehension of reversible clauses ( p = 0.000), but not in irreversible clauses ( p = 0.834). 4.
Considering the semantic and grammatical complexity of the different clause types (for details see Table 3 ), markedly significant differences between ASD and TD children were observed for the more complex but not for the simpler sentences (i.e., verbal vs. nominal inflexions, projective vs. topological locatives, semantically improbable vs. probable and neutral active affirmative clauses, reversible vs. irreversible clauses) [ 33 ].