Table 5.
Consistency between Structured Photographic Expressive Language Test–Third Edition (SPELT-3; Dawson et al., 2003) and Index of Productive Syntax (IPSyn; Scarborough, 1990) across 18 morphosyntactic structures.
| Form (IPSyn no.) | SPELT-3 | IPSyn | Consistency |
|---|---|---|---|
| Prepositional phrase (V3) | |||
| DLD | Scarce Evidence | Evident | Neutral |
| LD-ASD | Scarce Evidence | Evident | Neutral |
| Plural –s (N7) | |||
| DLD | Scarce Evidence | Evident | Neutral |
| LD-ASD | Evident | Evident | Consistent |
| Progressive –ing (V7) | |||
| DLD | Scarce Evidence | Evident | Neutral |
| LD-ASD | Scarce Evidence | Evident | Neutral |
| Third-person singular –s ◊ (V10) | |||
| DLD | Evident | Scarce Evidence | Neutral |
| LD-ASD | Not Evident | Evident | Contradictory |
| Past tense –ed (V12) | |||
| DLD | Evident | Evident | Consistent |
| LD-ASD | Scarce Evidence | Scarce Evidence | Consistent |
| Past tense copula BE (V16) | |||
| DLD | Scarce Evidence | Evident | Neutral |
| LD-ASD | Scarce Evidence | Scarce Evidence | Consistent |
| Infinitive (S8) | |||
| DLD | Scarce Evidence | Evident | Neutral |
| LD-ASD | Not Evident | Evident | Contradictory |
| Infinitive (two subjects) ◊ (S17) | |||
| DLD | Not Evident | Not Evident | Consistent |
| LD-ASD | Not Evident | Not Evident | Consistent |
| Wh-clause ◊ (S13) | |||
| DLD | Not Evident | Evident | Contradictory |
| LD-ASD | Not Evident | Scarce Evidence | Neutral |
| Participle (S18) | |||
| DLD | Evident | Not Evident | Contradictory |
| LD-ASD | Not Evident | Not Evident | Consistent |
| Negative (Q5N) | |||
| DLD | Scarce Evidence | Evident | Neutral |
| LD-ASD | Scarce Evidence | Evident | Neutral |
| Y/N interrogative (Q8) | |||
| DLD | Scarce Evidence | Not Evident | Neutral |
| LD-ASD | Scarce Evidence | Scarce Evidence | Consistent |
| Wh-question (Q9) | |||
| DLD | Scarce Evidence | Not Evident | Neutral |
| LD-ASD | Not Evident | Not Evident | Consistent |
| Direct/indirect object ◊ (S14) | |||
| DLD | Evident | Not Evident | Contradictory |
| LD-ASD | Evident | Not Evident | Contradictory |
| Copula BE ◊ (V4) | |||
| DLD | Evident | Evident | Consistent |
| LD-ASD | Not Evident | Evident | Contradictory |
| Propositional clause ◊ (S11) | |||
| DLD | Not Evident | Scarce Evidence | Neutral |
| LD-ASD | Not Evident | Evident | Contradictory |
| Relative clause ◊ (S16) | |||
| DLD | Not Evident | Scarce Evidence | Neutral |
| LD-ASD | Not Evident | Scarce Evidence | Neutral |
| Embedded clause ◊ (S19) | |||
| DLD | Evident | Not Evident | Contradictory |
| LD-ASD | Not Evident | Not Evident | Consistent |
Note. DLD = developmental language disorder; LD-ASD = language disorder associated with autism spectrum disorder; Y/N = yes/no.
◊
Structures that are assessed by only one item on the SPELT-3.