Time-delay discrimination training: replication with different stimuli and different populations.
Pack time-delay trials with moving, feature-rich prompts—static cues teach little and can erase earlier learning.
01Research in Context
What this study did
The team ran time-delay discrimination training with two kinds of prompts.
One prompt set moved and changed shape: multiple dynamic distinctive-feature cues.
The other prompt stayed still: a single static nondistinctive cue like a colored field.
Kids with and without intellectual disability took part.
Each child got both prompt types in a single-case design.
What they found
The moving, changing prompts taught every child the new labels.
The single static prompt almost never worked.
Worse, the static cue sometimes wiped out what kids had already learned.
The authors call this strong evidence for dynamic cues.
How this fits with other research
Pritchard et al. (1987) showed that time delay beats least prompts for speed and errors.
Durand et al. (1990) now adds: once you pick time delay, load it with dynamic cues.
Sanford et al. (1980) found color-coded laces hurt shoe-tying transfer in autistic youth.
That paper looks like it clashes with the new one, but the tasks differ.
Self-care transfer needs cues that fade into real materials.
Discrimination here needs cues that spotlight the key difference.
Campos et al. (2023) tested static vs. dynamic signals in FCT.
They saw mixed results, yet their cues signaled schedule shifts, not new labels.
Taken together, dynamic wins for teaching new names, not for every context.
Why it matters
When you run time delay, skip the plain colored background or single arrow.
Use prompts that move, blink, or swap features.
Check that each cue points to the exact difference you want the child to see.
If a learner stalls, look at the prompt first—static cues can undo prior gains.
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02At a glance
03Original abstract
Two time-delay conditions for teaching complex visual discriminations to normal preschoolers and children with mild and moderate intellectual handicaps were compared. One condition involved spatially separating the distinctive components from the redundant parts of both stimuli (multiple dynamic distinctive-feature prompts). The other condition involved adding a colored field to the correct stimulus (single static nondistinctive-feature prompt). The effect of the latter condition was assessed with unlearned and learned tasks. The study consisted of four experiments. In one experiment, children were also required to use the prompts for self-monitoring responses given before prompting had occurred. The results indicated that for all populations and stimuli (a) time delay of multiple dynamic distinctive-feature prompts consistently produced learning, and (b) time delay of the single static nondistinctive-feature prompt almost never produced learning and frequently led to a complete loss of discriminative performance on previously learned tasks. The resistance to disruption was a function of the training history (i.e., with or without time delay) and IQ level. Self-monitoring increased the efficacy of time delay when multiple dynamic distinctive-feature prompts were used but not when the single static nondistinctive-feature prompt was used.
Research in developmental disabilities, 1990 · doi:10.1016/0891-4222(90)90036-8