![ti nspire cx cas ti nspire cx cas](https://i.redd.it/xe2daxq75rn31.jpg)
I do not just mean that they could feel better to press, I mean that they are not always clear which side of the button registered if one side did at all. The first issue I have is that these split buttons are unsatisfying to press. I am not sure why they decided to use that design but I believe that it fell short in several ways. The signifiers do not work if they do not communicate a clear point to the user.Īnother strange quirk of the button design is that Texas Instruments decided to use split buttons. I may mean something to somebody that knows more about math than I do, but to me and my friends, it was puzzling. On the TI-nspire there are many examples of unclear signifiers but I am going to call attention to the one that looks like “☐”. It is much less helpful when the signifier just doesn’t make sense. These signifiers are often helpful when the symbols are recognizable such is the case with addition (+), subtraction (-), multiplication (x), or division (÷). The buttons have written out or iconic signifiers to help the user discern what each button accomplishes. Lastly, I’d like to point out that the buttons are much larger and much easier to read because the larger size allows for larger signifiers on the buttons. Additionally, the act of pressing the button is much more satisfying which makes the entire experience more pleasurable. That shape helps make the buttons discoverable as their purpose is to be pressed inwards. If you look at the shape of the buttons on this calculator, you can see that they are concave inward to fit to the shape of a finger. My friend’s calculator made by the same company with differently shaped buttons