Fork pressure test:
- Use the side of the fork to cut or cut food into smaller pieces
- Use your thumb to press the food with the bottom of the fork (the food sample should be about the same size as your fingernail, i.e. 1.5 x 1.5 cm) until your thumbnail turns white. The food will be flattened and changed in shape. Food does not return to its original shape after the fork is removed
 
References:
The International Dysphagia Diet Standardization Initiative (IDDSI)
https://iddsi.org/