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Posted by on Tuesday, March 30, 2010 at 7:12pm.

* Rub your index fingers gently over a piece of very coarse sandpaper a few times and rate its coarseness on a scale from 1 (very soft) to 7 (very coarse).
* After a minute or two, rub the same finger over the paper and again rate its coarseness. Did your perception of the coarseness change? How? Record your reaction.

  • american intercontinental university - , Tuesday, March 30, 2010 at 7:24pm

    Multiple post.


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