Let's explore intradimensional shifts for a bit. What are they? Well here's what the online encyclopedia Britannica has to say:
In an example of what is called "intradimensional" shift, initially the subject learns that GEK = GREEN; then, without warning, the experimenter changes the rule to GEK = RED. The same attribute or dimension (color) is still relevant, but the way in which it is used has been changed.
And here's the online encyclopedia of Psychopharmacology definition:
In the context of an ID/ED task, the intradimensional (ID) stage involves discriminating between two (generally novel) stimuli that differ from each other in at least two dimensions (e.g., color and shape) but for which the relevant discriminative dimension (e.g., color) has been primed by prior experience.
Well obviously these are under laboratory conditions, in controlled experiments. But what about the day-to-day intradimensional shifts all around us? Yes, they do occur naturally. But are they physical, or just perceived? Would the average person recognize one if they saw it? Would you? I really don't have answers to any of these questions, as I am just a songwriter. But thanks for listening.