A lot has been written on the psychology of  online shopping, however some things need to be tested to see if "your" clientele responds differently than others.  I understand that few companies or web developers have the time to do a split test, but sometimes it's just as important as writing the sales pitch or creating the graphics. 

Lucky for you, I have taken the time to test this in the apparel decorating industry and the results are (to me) shocking!

If you have a decorated apparel online store, please take the time to utilize this research I've done....and if it increases your sales, maybe you can send me a donation (LOL)

The test was posed as a question:  "Does it matter what wording I have for my call to action in getting someone to add a product to the cart"?

In this split-test, the only variable we changed was the text displayed on
the order button itself.

This test is based on a scientifically significant number of  81,650 total
page views or approximately 10,206  page views per version.

Here are the results based on their quantity of clicks:

   CONTROL: "Order Now" - 9 clicks - 0.9%
   TEST 1: "Add To Bag" - 98 clicks - 9.6%  
   TEST 2: "Add To Shopping Bag" - 93 clicks - 9.2%  
   TEST 3: "Add To Basket" - 61 clicks - 6.1%  
   TEST 4: "Add To Shopping Cart" - 48 clicks - 4.7%  
   TEST 5: "Buy" - 28 clicks - 2.8%  
   TEST 6: "Buy Now" - 15 clicks - 1.5%   

   And the winner is... (drum-roll, please)...

   WINNING TEST: "Add To Cart" - 180 clicks - 18.0%

Bottom Line Result: DON'T USE ANY OTHER WORDING THAN "Add to Cart"

This test winner outperformed the control by almost 20 Times.
So in other words, if your order links say "Order Now"...you're probably
leaving A LOT of money on the table.

It is important to notice that the add to cart text produced a 11.4%
higher cart abandonment rate than the more direct "Buy" text however
the net conversions using the "add to cart" text were more that 8X
times that of the more direct "Buy" button text.