The effect of spatio-temporal distance between visual stimuli on information processing in children with Specific Language Impairment.
Kids with SLI lose the first picture when a second one crowds it—give them blank space and extra time.
01Research in Context
What this study did
Dispaldro et al. (2015) watched how kids with Specific Language Impairment handle two pictures shown close in time or space.
They used a simple computer task. Kids had to name the first picture while a second picture popped up nearby.
The team compared the SLI group to same-age peers without language problems.
What they found
Children with SLI made more mistakes when the second picture landed near the first.
The closer the pictures came in time or space, the harder it was for them to name the first one.
Typical kids shrugged off the second picture; the SLI group got tangled.
How this fits with other research
Leroy et al. (2014) saw the same fragile performance in SLI during an analogy game. When perceptual cues vanished, the kids crashed. Both papers point to a weak perceptual anchor, not just weak language.
Desmottes et al. (2016) took the story one step further. They showed that SLI learners can master a finger sequence at first, but the skill slips away after a day. Marco’s fleeting picture trace and Lise’s fading motor trace look like the same fragile learning system.
Choi et al. (2012) seems to disagree. They found slower visual orienting in kids with Down syndrome, not greater interference. The clash clears up once you see the groups differ: Down syndrome slows the eyes, SLI lets the second stimulus wipe out the first.
Why it matters
If you teach a child with SLI, keep visuals clean and slow. Put space between pictures and wait a beat before showing the next item. One distractor can erase the first image, so cut the clutter on your flash cards, tablets, or room displays.
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02At a glance
03Original abstract
The purpose of this study is to evaluate whether children with Specific Language Impairment (SLI) have a deficit in processing a sequence of two visual stimuli (S1 and S2) presented at different inter-stimulus intervals and in different spatial locations. In particular, the core of this study is to investigate whether S1 identification is disrupted due to a retroactive interference of S2. To this aim, two experiments were planned in which children with SLI and children with typical development (TD), matched by age and non-verbal IQ, were compared (Experiment 1: SLI n=19; TD n=19; Experiment 2: SLI n=16; TD n=16). Results show group differences in the ability to identify a single stimulus surrounded by flankers (Baseline level). Moreover, children with SLI show a stronger negative interference of S2, both for temporal and spatial modulation. These results are discussed in the light of an attentional processing limitation in children with SLI.
Research in developmental disabilities, 2015 · doi:10.1016/j.ridd.2015.07.008