I don’t have colour constancy so my brain is always trying to decide what colour something is. Are my pink trousers really pink today or are they red or are they orange? They haven’t changed much from yesterday but there is some subtle change to the hue which alerts my brain that I am now seeing a different colour.
I don’t have sound constancy so my brain is always trying to decide what sound something it. My heater is clicking in the corner of my room. Is it the same click as yesterday? Or is it slightly brighter, duller, louder, quieter? Again, not much change from yesterday but my brain still has this insatiable curiosity about the quality of sound.
I don’t have touch constancy so my brain is always trying to decide how something feels. Every day I touch the cushions on my settee and my brain wonders if they feel the same as yesterday. Are they a little softer, a little too soft, a little harsher? Again not much change from yesterday but my brain cannot help itself but ask the questions.
And then there is smell. Do the chips cooking smell the same as yesterday? And taste? Do my chips taste the same as yesterday? Yes, my brain will not be happy if it hasn’t considered these things.
Exhausting – you must think! Well, yes it is! But I have a solution.
I need to work out what the pattern is. How does my cushion feel in January, February, March . . . ? What does the kitchen tap sound like and how does it make me feel in January, February, March . . . ? What colour is my strawberry jam in January, February, March . . .?
Then when that time of year comes round again, I won’t be shocked. I will be expecting each variation of the stimuli as I move through the year. Constancy, any way you can get it, is comforting. Lack of constancy is disturbing and makes us feel insecure.
I don’t have constancy for any of my sensitivities so the only thing constant in my life is change.